Immune function and micronutrient requirements change over the life course
Open accessAbstract
As humans age, the risk and severity of infections vary in line with immune competence according to how the immune system develops, matures, and declines. Several factors influence the immune system and its competence, including nutrition. A bidirectional relationship among nutrition, infection and immunity exists: changes in one component affect the others. For example, distinct immune features present during each life stage may affect the type, prevalence, and severity of infections, while poor nutrition can compromise immune function and increase infection risk. Various micronutrients are essential for immunocompetence, particularly vitamins A, C, D, E, B2, B6, and B12, folic acid, iron, selenium, and zinc. Micronutrient deficiencies are a recognized global public health issue, and poor nutritional status predisposes to certain infections. Immune function may be improved by restoring deficient micronutrients to recommended levels, thereby increasing resistance to infection and supporting faster recovery when infected. Diet alone may be insufficient and tailored micronutrient supplementation based on specific age-related needs necessary. This review looks at immune considerations specific to each life stage, the consequent risk of infection, micronutrient requirements and deficiencies exhibited over the life course, and the available evidence regarding the effects of micronutrient supplementation on immune function and infection.
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TL;DR
This narrative review describes how immune competence and infection risk change across infancy, childhood, adolescence/adulthood, and older age, and argues that micronutrient needs and deficiencies vary by life stage. It concludes that tailored micronutrient supplementation may restore immune function and reduce infection risk/severity, but more research on immune and clinical outcomes is needed.
Key findings
- Immune function follows a life-course pattern: immature in infants/children, mature in adolescence/young adulthood, and declining in older age (immunosenescence), with infection risk and severity varying accordingly. Children under 1 year average six colds per year, falling to about three per year at 10–14 years; older adults are 2–10 times more likely to die of infection than younger people, and 1.27 million deaths in people aged ≥70 were attributed to lower respiratory tract infections in 2015.
- Micronutrient deficiencies are common and age-patterned: an estimated 35% of people aged ≥50 in Europe, USA, and Canada have a demonstrable deficiency of one or more micronutrients; worldwide, iron, vitamin A, and iodine are the most common deficiencies, with zinc also common. European intake data show insufficient intakes of vitamin D (all ages), vitamin A (females 10+ years), vitamin E, folate, zinc (10+ years), iron (all ages), and selenium (all ages), while vitamins C, B6, B12, and copper were sufficient in the 4–14-year range.
- Supplementation evidence includes: zinc reduces morbidity and mortality from infectious diseases in infants/children in developing countries and can reduce pneumonia risk/duration, manage infantile diarrhea, lead to fewer malaria episodes, and shorten diarrhea; vitamin C shortens common cold duration/severity in children and adults; vitamin D protects against respiratory tract infections; in older people, multiple micronutrient supplementation may reduce antibiotic use and improve post-vaccination responses, and vitamin E improves NK cytotoxic activity, neutrophil chemotaxis, phagocytosis, lymphocyte proliferation, and IL-2 production.
- In older age, skin vitamin D synthesis is about 75% slower in people aged 65 years than in younger adults; marginal zinc deficiency is common, and zinc supplementation can restore thymulin activity, increase cytotoxic T cells, reduce activated Th cells, and increase NK cytotoxicity.
Methods
- Design: narrative review of life-stage-specific immunity, infection risk, micronutrient requirements/deficiencies, and effects of micronutrient supplementation, from the perspective of industrialized countries where possible.
- Data/sample: no primary sample; synthesizes published literature and tables, including European Nutrition and Health Report intake data compared with recommended dietary allowances (Table 2) and cited supplementation studies.
- Analysis: narrative synthesis by life stage (infants/children, adolescents/adults, older people); no systematic search, data extraction, or meta-analysis is described.
Limitations
- Stated: much more research is required into the effects of micronutrient supplementation on immune functions and clinical outcomes; no single biomarker accurately reflects supplementation effects on the immune response, so clinical outcomes are used instead.
- Stated: few data exist on micronutrient levels in infants from high-income countries; the full extent of sex on functional immune responses remains unclear; and genetic/environmental factors in healthy ageing “have yet to be described.”
- Evident: as a narrative review, it lacks a described systematic search strategy, formal study quality/risk-of-bias assessment, or quantitative pooling; conclusions rely on heterogeneous cited studies and may be subject to selection bias.
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Claims the paper makes
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- Findingreasoning
Only the intakes of vitamins C, B6 and B12 and copper were sufficient within this age range.
“Only the intakes of vitamins C, B6 and B12 and copper were sufficient within this age range.”
Quote in the paperNot a substantial claim - Findingnone given
In adults, there were insufficient dietary intakes for all micronutrients shown, apart from vitamin B6 and copper.
“In adults, there were insufficient dietary intakes for all micronutrients shown, apart from vitamin B6 and copper.”
Quote in the paperNot a substantial claim - Findingown data
Some children between the ages of 4 and 14 years had a surfeit of many micronutrients included in the table.
“It can be seen from the upper values that some children between the ages of 4 and 14 years had a surfeit of many micronutrients included in the table.”
Quote in the paperNot a substantial claim - Findingreasoning
Only the intakes of vitamins B6 and B12 and copper were sufficient in all cases.
“Only the intakes of vitamins B6 and B12 and copper were sufficient in all cases.”
Quote in the paperNot a substantial claim - Findingcitation
Data from Europe suggest that there is an insufficient intake of most micronutrients in older people, apart from vitamin B12, iron and copper.
“Overall, data from Europe [96] (Table 2) suggest that there is an insufficient intake of most micronutrients in older people, apart from vitamin B12, iron and copper [96].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [96] Elmadfa, 2009, European Nutrition and Health Report, Forum Nutr. source
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- Findingreasoning
Intakes were particularly low in female adults for folate, iron and selenium.
“Intakes were particularly low in female adults for folate, iron and selenium.”
Quote in the paperNot a substantial claim - Premisecitation
The innate immune system is functionally immature at birth.
“The innate system is still functionally immature at birth, to allow the fetus to tolerate non-shared maternal antigens, but also so that it is not constantly triggered by the considerable amount of stress and remodeling that take place during development [19].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [19] Simon, 2015, Evolution of the immune system in humans from infancy to old age, Proc. R. Soc. B source
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- Premisecitation
Various micronutrients are essential for immunocompetence, particularly vitamins A, C, D, E, B2, B6, and B12, folic acid, iron, selenium, and zinc.
“Various micronutrients are essential for immunocompetence, particularly vitamins A, C, D, E, B2, B6, and B12, folic acid, iron, selenium, and zinc.”
- Also stated in: § 1. Introduction · plain
“those most needed to sustain immunocompetence include vitamins A, C, D, E, B2, B6 and B12, folic acid, beta carotene, iron, selenium, and zinc [4].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
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- Also stated in: § 1. Introduction · plain
- Premisecitation
A bidirectional relationship exists among nutrition, infection and immunity, such that changes in one component affect the others.
“A bidirectional relationship among nutrition, infection and immunity exists: changes in one component affect the others.”
- Also stated in: § 1. Introduction · plain
“There is a bidirectional interaction among nutrition, infection and immunity: the immune response is compromised when nutrition is poor, predisposing individuals to infections, and a poor nutritional state may be exacerbated by the immune response itself to an infection [5].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
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- Also stated in: § 1. Introduction · plain
- Interpretationreasoning
Babies and children are more susceptible to infections until they are able to produce sufficient antibodies by themselves.
“babies and children are more susceptible to infections until they are able to produce sufficient antibodies by themselves.”
Quote in the paperNot a substantial claim - Premisecitation
Maternal antibodies are passed via the placenta before birth and in maternal colostrum and milk after birth, providing passive immunity.
“Passive immunity is where maternal antibodies (antigen-specific immunoglobulins) are passed via the placenta before birth, and in maternal colostrum and milk after birth [10].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
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- Premisecitation
Poor nutritional status predisposes to certain infections.
“poor nutritional status predisposes to certain infections.”
- Also stated in: § 1. Introduction · plain
“an individual’s nutritional status can predict the clinical course and outcome of certain infections such as diarrhea, pneumonia and measles [4].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
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- Also stated in: § 1. Introduction · plain
- Premisereasoning
Nutrition influences the immune system and its competence.
“Several factors influence the immune system and its competence, including nutrition.”
Quote in the paperSubstantial claim - Interpretationreasoning
Diet alone may be insufficient to achieve good nutritional status.
“Diet alone may be insufficient and tailored micronutrient supplementation based on specific age-related needs necessary.”
- Also stated in: § 1. Introduction · hedged
“However, it is not always possible to achieve good nutritional status via the diet alone.”
Quote in the paperSubstantial claim - Also stated in: § 1. Introduction · hedged
- Premisereasoning
Immune protection from pathogens immediately after birth relies on passive immunity and innate immunity.
“Therefore, immune protection from pathogens such as bacteria and viruses immediately after birth relies on two primary methods of defense, passive immunity and innate immunity.”
Quote in the paperNot a substantial claim - Interpretationreasoning
The risk and severity of infections vary over a lifetime in line with immune competence.
“Accordingly, the risk and severity of infections such as the common cold and influenza (the most common illnesses in humans [3]), pneumonia and diarrheal infections also vary over a lifetime.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [3] Maggini, 2017, Vitamins C., D and zinc: Synergistic roles in immune function and infections, Vitam. Miner. source
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- Premisecitation
Autoimmune disorders such as Sjogren syndrome, systemic lupus erythematosus and autoimmune thyroid disease are higher in women.
“autoimmune disorders such as Sjogren syndrome, systemic lupus erythematosus and autoimmune thyroid disease are higher in women [23].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [23] Brodin, 2017, Human immune system variation, Nat. Rev. Immunol. source
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- Premisecitation
In children under five years, symptoms of flu can cause severe illness, complications and even death.
“In this age group, symptoms of flu can cause severe illness, complications and even death [46].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] World Health Organization (2018, April 28). Influenza (Seasonal). Available online: http://www.who.int/mediacentre/factsheets/fs211/en/.
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- Premisecitation
Many of the most common chronic diseases associated with ageing, such as atherosclerosis, Alzheimer's disease, osteoporosis and diabetes, are related to low-grade inflammation.
“Many of the most common chronic diseases associated with ageing, such as atherosclerosis, Alzheimer’s disease, osteoporosis and diabetes [1], are related to low-grade inflammation [32].”
Quote in the paperNot a substantial claim0 of 2 sources checked - Premisecitation
Oxidative damage can compromise the integrity of immune cell membranes and alter transmission of signals within and between immune cells, leading to an impaired immune response.
“Thus, oxidative damage can compromise the integrity of immune cell membranes and alter transmission of signals both within and between different immune cells, leading to an impaired immune response [10].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
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- Premisecitation
The incidence of autoimmune diseases increases in later life as the ageing immune system becomes unable to fully tolerate self-antigens.
“The incidence of autoimmune diseases also increases in later life, as the ageing immune system becomes unable to fully tolerate self-antigens [19,37].”
Quote in the paperNot a substantial claim0 of 2 sources checked - Premisecitation
Adult levels of IgM are reached by the age of four years.
“adult levels of IgM (the first immunoglobulin made by the fetus and virgin B cells challenged with antigen) are reached by the age of four years [29].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [29] Berg, 1969, Immunoglobulin levels during childhood, with special regard to IgE, Acta Paediatr. source
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- Premisecitation
Defenses against intracellular pathogens and cell-mediated immunity rely on Th-1 responses, which reach adult levels only after around two years of age.
“Defenses against intracellular pathogens and cell-mediated immunity rely on Th-1 responses, which reach adult levels only after around two years of age [24].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [24] MacGillivray, 2014, The role of environmental factors in modulating immune responses in early life, Front. Immunol. source
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- Interpretationreasoning
Infants and young children are more susceptible to infections than adolescents and adults.
“These factors, combined with their greater potential for exposure to pathogens at nursery and school, means that infants and young children are more susceptible to infections than adolescents and adults [23].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [23] Brodin, 2017, Human immune system variation, Nat. Rev. Immunol. source
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- Premisecitation
Antibody production increases with age from infancy to childhood.
“Antibody production increases with age from infancy to childhood.”
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Increased levels of circulating pro-inflammatory cytokines characterize low-grade chronic inflammation in older people, a process known as inflamm-aging.
“Increased levels of circulating pro-inflammatory cytokines (e.g., tumor-necrosis factor alpha, IL-1, and IL-6 [1,25]) characterize low-grade chronic inflammation in older people, a process known as inflamm-aging [1].”
Quote in the paperNot a substantial claim0 of 2 sources checked - Premisecitation
In older people, functional activity of immune cells such as phagocytes and the intracellular respiratory burst necessary to kill pathogens are reduced.
“In older people, functional activity of immune cells such as phagocytes and the intracellular respiratory burst necessary to kill pathogens are reduced [1].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [1] Soveral, 2014, The immune system and aging: A review, Gynecol. Endocrinol. source
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- Interpretationcitation
Most older people over the age of 60-65 years experience some immune dysregulation that makes them less able to respond to immune challenges.
“most older people over the age of 60–65 years (although not all) experience some immune dysregulation that makes them less able to respond to immune challenges [33,34].”
Quote in the paperSubstantial claim0 of 2 sources checked - Interpretationcitation
Young, non-pregnant adults seem well equipped to cope with immune challenges.
“In general, young, non-pregnant adults seem to be well equipped to cope with immune challenges, which may reflect the procreative potential of young adults in the survival of the species [19].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [19] Simon, 2015, Evolution of the immune system in humans from infancy to old age, Proc. R. Soc. B source
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- Premisecitation
Infection with the seasonal influenza virus is more common in children under the age of five years.
“Infection with the seasonal influenza virus, which is caused by a different influenza type each year, is also more common in children under the age of five years [46].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] World Health Organization (2018, April 28). Influenza (Seasonal). Available online: http://www.who.int/mediacentre/factsheets/fs211/en/.
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- Premisecitation
As children grow, their immune systems continue to mature and acquire memory after exposure to multiple foreign challenges including pathogens, food, environmental components and vaccines.
“As children grow and develop, their immune systems continue to mature and acquire memory after exposure to multiple foreign challenges including from pathogens, food and other environmental components and vaccines [19].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [19] Simon, 2015, Evolution of the immune system in humans from infancy to old age, Proc. R. Soc. B source
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- Premisecitation
After 60 years of age, there is a decrease in secretory IgA, which forms part of the first line of defense against pathogens that invade mucosal surfaces.
“After 60 years of age, there is a decrease in secretory IgA, which forms part of the first line of defense against pathogens that manage to invade the mucosal surfaces [38].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [38] Jafarzadeh, 2010, Salivary IgA and IgE levels in healthy subjects: Relation to age and gender, Braz. Oral Res. source
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- Premisecitation
In older people, a lifetime of exposure to antigens and to numerous sources of oxidative stress can cause immune dysregulation that makes them more susceptible to infections than any other age group apart from young children.
“In older people, a lifetime of exposure to antigens and to numerous sources of oxidative stress can cause immune dysregulation that makes them more susceptible to infections than any other age group apart from young children [23,35,36].”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [23] Brodin, 2017, Human immune system variation, Nat. Rev. Immunol. source
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- cites [35] Ventura, 2017, Immunosenescence in aging: Between immune cells depletion and cytokines up-regulation, Clin. Mol. Allergy source
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- cites [36] Pawelec, 2017, Does the human immune system ever really become “senescent”?, F1000Research source
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- Premisecitation
Moderate amounts of polyphenol-rich alcoholic beverages potentially provide some immune protection.
“Alcohol consumption has variable effects on immunity; moderate amounts of polyphenol-rich alcoholic beverages potentially provide some immune protection while excessive consumption of alcohol can suppress many aspects of immune function and consequently increase the risk of infection [57].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [57] Romeo, 2007, Moderate alcohol consumption and the immune system: A review, Br. J. Nutr. source
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- Premisecitation
Common cold is more likely in those suffering from psychological stress.
“Common cold is also more likely in those suffering from psychological stress [59], while moderate physical exercise may decrease the risk [60].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [59] Cohen, 1991, Psychological stress and susceptibility to the common cold, N. Engl. J. Med. source
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- Premisecitation
The risk of many infections such as urinary tract infections, lower respiratory tract infections, skin and soft tissue infections is greatly increased in older people.
“Although certain infections are less likely in older people (for example, the incidence of common cold has been shown to be the lowest those aged over 60 years [45]), the risk of many others such as urinary tract infections, lower respiratory tract infections, skin and soft tissue infections, for example, is greatly increased [65].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [65] Yoshikawa, 2000, Epidemiology and unique aspects of aging and infectious diseases, Clin. Infect. Dis. source
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- Interpretationreasoning
The risk of common cold is likely to be greater in those who come into close contact with children, who are at highest risk.
“The incidence of common cold is lowest in adolescents compared with all other age groups, but increases in adults aged 20–30 years [45]; the risk is likely to be greater in those who come into close contact with children, who are at highest risk.”
Quote in the paperNot a substantial claim - Premisecitation
Around two-thirds of older patients with common cold develop lower respiratory illness.
“Around two-thirds of older patients with common cold develop lower respiratory illness [66], while older individuals are 2–10 times more likely to die of infection than younger people [11].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [66] Heikkinen, 2003, The common cold, Lancet source
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- Premisecitation
Sleep disturbances and deprivation are therefore likely to have adverse effects on the immune system, including dysregulation of NK cells and pro-inflammatory and anti-inflammatory cytokines.
“Sleep disturbances and deprivation are therefore likely to have adverse effects on the immune system, including dysregulation of NK cells and pro-inflammatory and anti-inflammatory cytokines [58].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [58] Besedovsky, 2012, Sleep and immune function, Eur. J. Physiol. source
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- Premisecitation
Infection with influenza viruses other than the seasonal variety (e.g., H1N1) is more prevalent in young to middle-aged, previously healthy adults.
“Infection with influenza viruses other than the seasonal variety (e.g., H1N1) is more prevalent in young to middle-aged, previously healthy adults [61].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [61] Risk Management Solutions (2018, April 28). Learning from the 2009 H1N1 Influenza Pandemic. Available online: http://static.rms.com/email/documents/liferisks/reports/learning-from-the-2009-h1n1-influenza-pandemic.pdf.
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- Premisecitation
Chronic, psychological stress is another factor that can impact immune function, suppressing cellular and humoral responses.
“Chronic, psychological stress is another factor that can impact immune function, suppressing cellular and humoral responses [56].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [56] Segerstrom, 2004, Psychological stress and the human immune system: A meta-analytic study of 30 years of inquiry, Psychol. Bull. source
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- Premisenone given
Infection and undernutrition have a synergistic relationship.
“Infection and undernutrition have a synergistic relationship”
Quote in the paperSubstantial claim - Premisecitation
Moderate physical exercise may decrease the risk of common cold.
“Common cold is also more likely in those suffering from psychological stress [59], while moderate physical exercise may decrease the risk [60].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [60] Nieman, 1994, Exercise, upper respiratory tract infection, and the immune system, Med. Sci. Sports Exerc. source
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- Premisecitation
Micronutrient deficiencies have immunological consequences in infants and young children and can increase morbidity and mortality from many diseases, including pneumonia, diarrheal disease, and measles.
“Micronutrient deficiencies also have immunological consequences in infants and young children, and can increase morbidity and mortality from many diseases, including pneumonia, diarrheal disease, and measles [4,49].”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
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- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
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- Premisecitation
Immune memory can be very long lasting, providing protection against many infections for decades.
“Immune memory can be very long lasting, providing protection against many infections for decades; however, people are living much longer than before, and the pool of antigen-specific T cells may diminish over time [36].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [36] Pawelec, 2017, Does the human immune system ever really become “senescent”?, F1000Research source
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- Premisecitation
Pollution and cigarette smoke certainly compromise immune function, particularly when combined with poor nutrition.
“Pollution and cigarette smoke certainly compromise immune function, particularly when combined with poor nutrition [10].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
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- Premisecitation
Older individuals are 2-10 times more likely to die of infection than younger people.
“Around two-thirds of older patients with common cold develop lower respiratory illness [66], while older individuals are 2–10 times more likely to die of infection than younger people [11].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [11] Maggini, 2008, Feeding the immune system: The role of micronutrients in restoring resistance to infections, CAB Rev.
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- Premisecitation
The pool of antigen-specific T cells may diminish over time.
“Immune memory can be very long lasting, providing protection against many infections for decades; however, people are living much longer than before, and the pool of antigen-specific T cells may diminish over time [36].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [36] Pawelec, 2017, Does the human immune system ever really become “senescent”?, F1000Research source
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- Premisecitation
The incidence of common cold has been shown to be the lowest in those aged over 60 years.
“Although certain infections are less likely in older people (for example, the incidence of common cold has been shown to be the lowest those aged over 60 years [45]), the risk of many others such as urinary tract infections, lower respiratory tract infections, skin and soft tissue infections, for example, is greatly increased [65].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [45] Monto, 1974, Acute respiratory illness in an American community: The Tecumseh study, JAMA source
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- Premisecitation
Infection with seasonal influenza viruses is normally greatest in older people and young children.
“Infection with seasonal influenza viruses is normally greatest in older people and young children [46].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] World Health Organization (2018, April 28). Influenza (Seasonal). Available online: http://www.who.int/mediacentre/factsheets/fs211/en/.
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- Premisecitation
Influenza vaccination can reduce severe illnesses and complications in people aged 65 years or older.
“Nevertheless, influenza vaccination can reduce severe illnesses and complications in people aged 65 years or older [46].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] World Health Organization (2018, April 28). Influenza (Seasonal). Available online: http://www.who.int/mediacentre/factsheets/fs211/en/.
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- Premisecitation
During weaning and in the first years of life, both vitamin A and zinc play major roles in immunity to infectious disease.
“During weaning and in the first years of life, both vitamin A and zinc play major roles in immunity to infectious disease [77].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [77] Pettifor, J., and Zlotkin, S. (2004). Impact of micronutrient deficiencies on immune function. Micronutrient Deficiencies during the Weaning Period and the First Years of Life, Proceedings of the 54th Nestlé Nutrition Workshop, Pediatric Program, São Paulo, Brazil, 26–30 October 2003, Nestlé Nutrition Institute Workshop Series. source
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- Premisecitation
Vitamin D content of human milk is low and usually insufficient to meet requirements in exclusively-breastfed infants if the infant's sunlight exposure is limited.
“Furthermore, vitamin D content of human milk is low and usually insufficient to meet requirements in exclusively-breastfed infants if the infant’s sunlight exposure is limited [72,76].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [72] Butte, N., Lopez-Alarcon, M., and Garza, C. (2017, December 12). Nutrient Adequacy of Exclusive Breastfeeding for the Term Infant during the First Six Months of Life. Available online: http://apps.who.int/iris/handle/10665/42519.
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- cites [76] Dawodu, 2012, Maternal vitamin D status: Effect on milk vitamin D content and vitamin D status of breastfeeding infants, Adv. Nutr. source
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- Premisecitation
The development, maintenance and optional functioning of immune cells is dependent on adequate nutrition, evident at all stages of life.
“The development, maintenance and optional functioning of immune cells is dependent on adequate nutrition, evident at all stages of life [4,5,33,49,69].”
Quote in the paperSubstantial claim0 of 5 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
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- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
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- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
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- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
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- cites [69] Albers, R., Bourdet-Sicard, R., Braun, D., Calder, P., Herz, U., Lambert, C., Lenoir-Wijnkoop, I., Meheurst, A., Ouwehand, A., and Phothirath, P. (2013). Monitoring immune modulation by nutrition in the general population: Identifying and substantiating effects on human health. Br. J. Nutr., S110–S130. source
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- Premisecitation
Infection can cause a significant increase in the demand for micronutrients, met by endogenous or exogenous (i.e., the diet) supplies.
“In turn, infection can cause a significant increase in the demand for micronutrients, met by endogenous or exogenous (i.e., the diet) supplies [5,50].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
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- cites [50] Bresnahan, 2014, Undernutrition, the acute phase response to infection, and its effects on micronutrient status indicators, Adv. Nutr. source
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- Interpretationreasoning
These factors may explain why older people have a poorer response to vaccines than the young.
“This is the case in many older people, and these factors may explain why they have a poorer response to vaccines than the young [1,36].”
Quote in the paperSubstantial claim0 of 2 sources checked - Premisecitation
The greater morbidity and mortality associated with influenza in older people occur because dysregulation in the immune response predisposes them to secondary bacterial infection of the respiratory tract (e.g., bronchitis and bacterial pneumonia).
“The greater morbidity and mortality associated with influenza in this age group occur because dysregulation in the immune response predisposes them to secondary bacterial infection of the respiratory tract (e.g., bronchitis and bacterial pneumonia) [68].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [68] Ballinger, 2010, Postinfluenza bacterial pneumonia: Host defenses gone awry, J. Interferon Cytokine Res. source
Not checked in the free run.
- Interpretationreasoning
An inadequate intake of micronutrients at any stage of life affects various functions within the immune system, manifesting in decreased resistance to infections and an increase in the severity of symptoms.
“An inadequate intake of micronutrients at any stage of life affects various functions within the immune system, manifesting in decreased resistance to infections and an increase in the severity of symptoms (Table 3).”
Quote in the paperSubstantial claim - Premisecitation
Older people lose their ability to produce endogenous antioxidants compared with younger adults.
“However, older people lose their ability to produce endogenous antioxidants compared with younger adults [103].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [103] Karaouzenea, 2011, Effects of the association of aging and obesity on lipids, lipoproteins and oxidative stress biomarkers: A comparison of older with young men, Nutr. Metab. Cardiovasc. Dis. source
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- Premisecitation
Older women are often at higher risk of deficiency, especially for vitamins B12, A, C, and D, iron and zinc.
“Older women, who usually have a longer life expectancy compared to men, are often at higher risk of deficiency, especially for vitamins B12, A, C, and D, iron and zinc [99].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [99] Montgomery, 2014, Micronutrient needs of the elderly, Nutr. Clin. Pract. source
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- Premisecitation
The risk of all types of infection (bacterial, viral, and fungal), but especially diarrhea and pneumonia, is increased by zinc deficiency.
“As a result, the risk of all types of infection (bacterial, viral, and fungal), but especially diarrhea and pneumonia, is increased [49].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
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- Premisecitation
Micronutrient deficiencies have been recorded in adolescents and adults in Europe.
“Micronutrient deficiencies have been recorded in adolescents and adults in Europe [96] (Table 2).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [96] Elmadfa, 2009, European Nutrition and Health Report, Forum Nutr. source
Not checked in the free run.
- Interpretationreasoning
A sufficient supply of antioxidants (e.g., vitamin C, selenium, and zinc) is required to combat the oxidative stress that is a major factor in immune dysregulation in older people.
“As in younger adults, a sufficient supply of antioxidants (e.g., vitamin C, selenium, and zinc) is required to combat the oxidative stress that is a major factor in immune dysregulation in older people.”
Quote in the paperSubstantial claim - Premisecitation
Impaired immunity in older people, often caused by multiple micronutrient deficiencies, is evident in the increased incidence and severity of common infections that affect the upper and lower respiratory tracts, as well as the urinary and genital tracts.
“Impaired immunity in older people, often caused by multiple micronutrient deficiencies, is evident in the increased incidence and severity of common infections that affect the upper and lower respiratory tracts, as well as the urinary and genital tracts [33,116].”
Quote in the paperSubstantial claim0 of 2 sources checked- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
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- cites [116] Hamer, 2009, Micronutrient deficiencies are associated with impaired immune response and higher burden of respiratory infections in elderly Ecuadorians, J. Nutr. source
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- Premisecitation
As no single biomarker exists that accurately reflects the effects of supplementation on the immune response, clinical outcomes are instead used to determine the effectiveness of supplementation.
“As no single biomarker exists that accurately reflects the effects of supplementation on the immune response, clinical outcomes are instead used to determine the effectiveness of supplementation [49,69].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
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- cites [69] Albers, R., Bourdet-Sicard, R., Braun, D., Calder, P., Herz, U., Lambert, C., Lenoir-Wijnkoop, I., Meheurst, A., Ouwehand, A., and Phothirath, P. (2013). Monitoring immune modulation by nutrition in the general population: Identifying and substantiating effects on human health. Br. J. Nutr., S110–S130. source
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- Premisecitation
Micronutrient deficiencies are closely linked to infectious diseases that can cause substantial morbidity and mortality in infants and children.
“Micronutrient deficiencies are closely linked to infectious diseases that can cause substantial morbidity and mortality in infants and children [49].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
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- Premisecitation
Increased production of ROS during the immune response to pathogens may decrease vitamin C levels further.
“Increased production of ROS during the immune response to pathogens may decrease vitamin C levels further [105].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [105] Hemilä, H., and Chalker, E. (2013). Vitamin C for preventing and treating the common cold. Cochrane Database Syst. Rev., Available online: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD000980.pub4/full. source
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- Premisecitation
The duration and severity of common cold symptoms can be reduced by zinc supplementation in children when taken within 24 h of symptom onset.
“The duration and severity of common cold symptoms can be reduced by zinc supplementation in children when taken within 24 h of symptom onset [108].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [108] 2011, Zinc lozenges may shorten the duration of colds: A systematic review, Open Respir. Med. J. source
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- Premisecitation
Benefits of vitamin D supplementation are particularly apparent in those who are very vitamin D deficient.
“Benefits are particularly apparent in those who are very vitamin D deficient [115].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [115] Martineau, 2017, Vitamin D supplementation to prevent acute respiratory infections: Systematic review and meta-analysis of individual participant data, BMJ source
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- Premisecitation
Supplementation with modest amounts of a combination of micronutrients can have beneficial effects in older people.
“Supplementation with modest amounts of a combination of micronutrients can have beneficial effects [33].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
Not checked in the free run.
- Premisecitation
Zinc supplementation reduces morbidity and mortality from infectious diseases among infants and children in developing countries.
“Zinc supplementation reduces morbidity and mortality from infectious diseases among infants and children in developing countries [77].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [77] Pettifor, J., and Zlotkin, S. (2004). Impact of micronutrient deficiencies on immune function. Micronutrient Deficiencies during the Weaning Period and the First Years of Life, Proceedings of the 54th Nestlé Nutrition Workshop, Pediatric Program, São Paulo, Brazil, 26–30 October 2003, Nestlé Nutrition Institute Workshop Series. source
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- Premisecitation
When used in combination with zinc, vitamin C supplementation can relieve symptoms such as rhinorrhea in common cold.
“When used in combination with zinc, vitamin C supplementation can relieve symptoms such as rhinorrhea in common cold [110], which is commonly regarded as the most frequent and troublesome symptoms of the infection (along with nasal congestion) [111].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [110] Maggini, 2012, A combination of high-dose vitamin C plus zinc for the common cold, J. Int. Med. Res. source
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- Premisecitation
In low-birthweight infants, supplementary zinc can partly restore cell-mediated immunity.
“In low-birthweight infants, supplementary zinc can partly restore cell-mediated immunity [33].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
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- Premisecitation
Significantly fewer adults who received the micronutrient supplement reported headache, sore eyes, nasal congestion, throat inflammation, tiredness/pain, diarrhea or symptoms associated with an acute respiratory tract infection, such as cough.
“Significantly fewer adults who received the micronutrient supplement reported headache, sore eyes, nasal congestion, throat inflammation, tiredness/pain, diarrhea or symptoms associated with an acute respiratory tract infection, such as cough [10].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
Not checked in the free run.
- Premisecitation
Supplementation with vitamin C reduces the duration and severity of common cold symptoms in adults.
“Supplementation with vitamin C reduces the duration and severity of common cold symptoms in adults [105].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [105] Hemilä, H., and Chalker, E. (2013). Vitamin C for preventing and treating the common cold. Cochrane Database Syst. Rev., Available online: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD000980.pub4/full. source
Not checked in the free run.
- Premisecitation
Not all studies have reported beneficial effects on respiratory tract infections with vitamin E supplementation in older people.
“However, not all studies have reported beneficial effects on respiratory tract infections with vitamin E supplementation in older people [14].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [14] Micronutrient Information Center (2018, April 17). Immunity in Depth. Available online: http://lpi.oregonstate.edu/mic/health-disease/immunity.
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- May combine two claims. 86
- Classified as probably not a substantial claim. 13
May combine two claims.
FindingcitationIntakes were low for vitamin D (females), vitamin E (males and females) and folate (males and females).
“In particular, intakes were low for vitamin D (females), vitamin E (males and females) and folate (males and females).”
Quote in the paperNot a substantial claimMay combine two claims.
FindingcitationSome adolescents had an insufficient intake of vitamin C (males 15-18 years), vitamin D, vitamin A (males 15-18 years; females 10-18 years), vitamin E, folate, zinc (10-18 years), iron and selenium.
“The lower ranges indicate that some adolescents had an insufficient intake of vitamin C (males 15–18 years), vitamin D, vitamin A (males 15–18 years; females 10–18 years), vitamin E, folate, zinc (10–18 years), iron and selenium.”
Quote in the paperSubstantial claimMay combine two claims.
Findingown dataThere were children who had an insufficient intake of vitamin D (all ages), vitamin A (females 10+ years), vitamin E, folate, zinc (10+ years), iron (all ages) and selenium (all ages).
“However, the lower ranges indicate that there were children who had an insufficient intake of vitamin D (all ages), vitamin A (females 10+ years), vitamin E, folate, zinc (10+ years), iron (all ages) and selenium (all ages).”
Quote in the paperNot a substantial claimMay combine two claims.
Findingown dataThe reported micronutrient intake data in Table 2 suggest that over-supplementation is unlikely with most micronutrients, perhaps with the exception of vitamin A in children.
“Although this is theoretically possible, the reported micronutrient intake data in Table 2 suggest that over-supplementation is unlikely with most micronutrients, perhaps with the exception of vitamin A in children.”
Quote in the paperSubstantial claimMay combine two claims.
InterpretationreasoningMicronutrient requirements and deficiencies vary over the life course, with certain micronutrients more likely to be insufficient at different stages.
“certain micronutrients may be more likely to be insufficient at different stages of the life course.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationPoor nutrition compromises immune function and increases infection risk.
“while poor nutrition can compromise immune function and increase infection risk.”
- Also stated in: § 1. Introduction · plain
“the immune response is compromised when nutrition is poor, predisposing individuals to infections”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
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- Also stated in: § 1. Introduction · plain
May combine two claims.
PremisecitationMicronutrient deficiencies and suboptimal intakes are common worldwide.
“Micronutrient deficiencies are a recognized global public health issue”
- Also stated in: § 1. Introduction · plain
“It is recognized that micronutrient deficiencies and suboptimal intakes are common worldwide [7]”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [7] Ottaway, P.B. (2008). 3—Vitamin and mineral fortification of foods. Food Fortification and Supplementation, Woodhead Publishing. source
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- Also stated in: § 1. Introduction · plain
May combine two claims.
PremisecitationEven in industrialized nations, social, economic, educational, ethnic and cultural backgrounds influence diet and may adversely affect an individual's micronutrient status.
“Even in industrialized nations, where it may be presumed that healthy, nutritious food is easier to obtain, social, economic, educational, ethnic and cultural backgrounds influence the diet and may adversely affect an individual’s micronutrient status [8].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [8] Schaefer, 2016, Micronutrient deficiency in women living in industrialized countries during the reproductive years: Is there a basis for supplementation with multiple micronutrients?, J. Nutr. Disord. Ther. source
Not checked in the free run.
May combine two claims.
PremisecitationThe neonatal innate immune system comprises different protective cell populations compared with adults, as well as qualitative differences in the responses by shared cell populations.
“The neonatal innate immune system comprises different protective cell populations compared with adults, as well as qualitative differences in the responses by shared cell populations [23].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [23] Brodin, 2017, Human immune system variation, Nat. Rev. Immunol. source
Not checked in the free run.
May combine two claims.
PremisecitationPrior to birth, babies lack significant antigenic exposure, have not acquired immunological memory, and their adaptive immunity is not fully developed.
“Prior to birth, babies lack significant antigenic exposure and so have not yet acquired immunological memory and their adaptive immunity is not fully developed [5,10,11,19].”
Quote in the paperSubstantial claim0 of 4 sources checked- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
Not checked in the free run.
- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
Not checked in the free run.
- cites [11] Maggini, 2008, Feeding the immune system: The role of micronutrients in restoring resistance to infections, CAB Rev.
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- cites [19] Simon, 2015, Evolution of the immune system in humans from infancy to old age, Proc. R. Soc. B source
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May combine two claims.
InterpretationcitationImmune function changes over the life course, developing in infants and children, potentially optimal in adolescents and young adults, and declining in older people.
“As humans age, the immune system evolves from the immature and developing immune responses in infants and children, through to immune function that is potentially optimal in adolescents and young adults, followed by a gradual decline in immunity (particularly adaptive processes) in older people [1].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [1] Soveral, 2014, The immune system and aging: A review, Gynecol. Endocrinol. source
Not checked in the free run.
May combine two claims.
InterpretationcitationRestoring deficient micronutrients to recommended levels may improve immune function, thereby increasing resistance to infection and supporting faster recovery when infected.
“Immune function may be improved by restoring deficient micronutrients to recommended levels, thereby increasing resistance to infection and supporting faster recovery when infected.”
- Also stated in: § 1. Introduction · hedged
“Resistance to infection may be enhanced by adding the deficient nutrient back into the diet and restoring immune function [4].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
Not checked in the free run.
- Also stated in: § 1. Introduction · hedged
May combine two claims.
PremisecitationAdult levels of IgG are reached by the age of 11-12 years, with a further increase during puberty.
“adult levels of IgG (expressed on the surface of mature B cells, and the most prevalent immunoglobulin in serum) are reached by the age of 11–12 years, with a further increase during puberty”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [29] Berg, 1969, Immunoglobulin levels during childhood, with special regard to IgE, Acta Paediatr. source
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May combine two claims.
PremisecitationFemales generate higher proinflammatory cytokine and chemokine responses to the influenza virus and experience greater morbidity and mortality than males.
“females generating higher proinflammatory cytokine and chemokine responses to the influenza virus and experiencing greater morbidity and mortality than males [31].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [31] Klein, 2012, Mechanisms of sex disparities in influenza pathogenesis, J. Leukoc. Biol. source
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May combine two claims.
PremisecitationWith increasing age, there is a loss of lymphoid tissue, particularly in the thymus, and the ability to respond to pathogens, antigens and mitogens decreases.
“There is a loss of lymphoid tissue, particularly in the thymus, with increasing age [25], and the ability to respond to pathogens, antigens and mitogens decreases [5,33].”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [25] Valiathan, 2016, Effects of ageing on the immune system: Infants to elderly, Scand. J. Immunol. source
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- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
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- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
Not checked in the free run.
May combine two claims.
PremisecitationChildren less than one year old experience an average of six colds per year; the frequency decreases with age to about three colds per year in older children (10-14 years).
“children less than one year old have been noted to experience an average of six colds per year; the frequency decreases with age to about three colds per year in older children (10–14 years) [45].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [45] Monto, 1974, Acute respiratory illness in an American community: The Tecumseh study, JAMA source
Not checked in the free run.
May combine two claims.
PremisecitationThe development of long-term immune memory is impaired with age, with a diminished response to vaccination.
“The development of long-term immune memory is also impaired, with a diminished response to vaccination [5].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
Not checked in the free run.
May combine two claims.
PremisecitationWomen initiate a higher humoral immune response to the influenza vaccine and experience more adverse reactions than men.
“Women also initiate a higher humoral immune response to the influenza vaccine, and experience more adverse reactions than men [31].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [31] Klein, 2012, Mechanisms of sex disparities in influenza pathogenesis, J. Leukoc. Biol. source
Not checked in the free run.
May combine two claims.
Interpretationnone givenThe immune system reaches maturity by adulthood, and small decreases or increases in single selected markers of immune function may not be clinically important after that.
“It should be noted that the immune system reaches maturity by adulthood, and small decreases or increases in single selected markers of immune function may not be clinically important after that.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationSome older people age without any major health problems (healthy ageing), and immune system dysfunction appears to be mitigated in this population.
“Some older people age without any major health problems, known as healthy ageing, and immune system dysfunction appears to be mitigated in this population [1].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [1] Soveral, 2014, The immune system and aging: A review, Gynecol. Endocrinol. source
Not checked in the free run.
May combine two claims.
PremisecitationMicrobial antigens are essential for the education of the immune system and development of Th-1 type responses, and breakdown in such immune education may predispose to allergic, inflammatory and autoimmune diseases.
“Microbial antigens are essential for the education of the immune system and development of Th-1 type responses and breakdown in such immune education may predispose to allergic, inflammatory and autoimmune diseases [5,10].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
Not checked in the free run.
- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationMany children in industrialized countries experience more than one episode of infective gastroenteritis per year, usually caused by rotavirus.
“many children in industrialized countries experiencing more than one episode of infective gastroenteritis per year, usually caused by rotavirus [47].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [47] (2018, April 28). National Institute for Health and Care Excellence Diarrhoea and Vomiting Caused by Gastroenteritis in under 5s: Diagnosis and Management. Available online: https://www.nice.org.uk/guidance/cg84.
Not checked in the free run.
May combine two claims.
PremisecitationImmunosenescence mostly affects adaptive immunity but also the innate immune system to a lesser extent.
“This is commonly referred to as immunosenescence, which mostly seems to affect adaptive immunity but also the innate immune system to a lesser extent [32].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [32] Robert, 2014, On the immunological theory of aging, Aging: Facts and Theories source
Not checked in the free run.
May combine two claims.
PremisecitationOlder people are more likely to suffer prolonged infections, severe symptoms and secondary complications.
“Furthermore, this age group is more likely to suffer prolonged infections, severe symptoms and secondary complications [33].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationIn contrast to children, sickness and diarrhea in adults are often caused by norovirus and campylobacter.
“In contrast to children, sickness and diarrhea in adults are often caused by norovirus [62] and campylobacter [63].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [62] Marshall, 2011, The dynamics of norovirus outbreak epidemics: Recent insights, Int. J. Environ. Res. Public Health source
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- cites [63] Man, 2011, The clinical importance of emerging Campylobacter species, Nat. Rev. Gastroenterol. Hepatol. source
Not checked in the free run.
May combine two claims.
PremisecitationMicronutrients have essential roles in the immune system and an inadequate intake may have deleterious effects.
“As outlined in Table 1, micronutrients have essential roles in the immune system and an inadequate intake may have deleterious effects [4].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
Not checked in the free run.
May combine two claims.
PremisecitationProlonged bouts of exercise and heavy training regimens in adults may create an imbalance between ROS and antioxidant defenses, leading to oxidative stress that alters signal transmission in the immune system and impairs the immune response.
“Nevertheless, prolonged bouts of exercise and heavy training regimens in adults may create an imbalance between ROS and antioxidant defenses [54], leading to oxidative stress that alters signal transmission in the immune system and impairs the immune response [10].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [54] Nieman, 2008, Immunonutrition support for athletes, Nutr. Rev. source
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- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
Not checked in the free run.
May combine two claims.
PremisecitationA poor diet may be combined with a sedentary lifestyle, leading to obesity, suboptimal immune response, and increased risk of infection.
“A poor diet may be combined with a sedentary lifestyle, leading to obesity, suboptimal immune response, and increased risk of infection [51].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [51] Milner, 2012, Micronutrients, immunology and inflammation. The impact of obesity on the immune response to infection, Proc. Nutr. Soc. source
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May combine two claims.
PremisecitationReactive oxygen species in, and caused by, pollution can also upset the oxidant-antioxidant balance within the body and cause oxidative stress, which must be counteracted by an adequate supply of antioxidants.
“Reactive oxygen species in, and caused by, pollution can also upset the oxidant–antioxidant balance within the body and cause oxidative stress, which must be counteracted by an adequate supply of antioxidants [10].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
Not checked in the free run.
May combine two claims.
PremisecitationThymic involution and the relative paucity of naïve lymphocytes in older people means that they are less able to mount an adequate defense against neoantigens and thus exposure to them is more hazardous than in younger people.
“In addition, thymic involution and the relative paucity of naïve lymphocytes in older people means that they are less able to mount an adequate defense against neoantigens and thus exposure to them is more hazardous than in younger people [36].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [36] Pawelec, 2017, Does the human immune system ever really become “senescent”?, F1000Research source
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Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
Interpretationnone givenNutritional status can be compromised by a poor diet, which is often observed in adults with a hectic and stressful lifestyle and ready access to fast food or energy-dense, micronutrient-poor convenience food.
“In particular, nutritional status can be compromised by a poor diet, which is often observed in adults with a hectic and stressful lifestyle and ready access to fast food or energy-dense, micronutrient-poor convenience food.”
Quote in the paperNot a substantial claimMay combine two claims.
InterpretationreasoningSeveral lifestyle-related factors affect immune competence in healthy adults and increase their risk of infection.
“Nevertheless, several lifestyle-related factors affect immune competence in healthy adults and increase their risk of infection (Figure 2).”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationImmunological maturity is achieved by adolescence, and young adults should be well fortified against attack by pathogens.
“Immunological maturity is achieved by adolescence, and young adults should be well fortified against attack by pathogens [19].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [19] Simon, 2015, Evolution of the immune system in humans from infancy to old age, Proc. R. Soc. B source
Not checked in the free run.
May combine two claims.
PremisecitationExcessive consumption of alcohol can suppress many aspects of immune function and consequently increase the risk of infection.
“Alcohol consumption has variable effects on immunity; moderate amounts of polyphenol-rich alcoholic beverages potentially provide some immune protection while excessive consumption of alcohol can suppress many aspects of immune function and consequently increase the risk of infection [57].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [57] Romeo, 2007, Moderate alcohol consumption and the immune system: A review, Br. J. Nutr. source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationLower respiratory tract infections are more common in children under five years old than any other age group worldwide, with risk factors including air pollution and suboptimal breastfeeding.
“Lower respiratory tract infections (e.g., bronchitis and pneumonia) are more common in children under five years old than any other age group worldwide, and risk factors include air pollution and suboptimal breastfeeding [48].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [48] GBD 2015 LRI Collaborators (2017). Estimates of the global, regional, and national morbidity, mortality, and aetiologies of lower respiratory tract infections in 195 countries: A systematic analysis for the Global Burden of Disease Study 2015. Lancet Infect. Dis., 17, 1133–1161.
Not checked in the free run.
May combine two claims.
PremisecitationMicronutrient deficiencies cause specific immune impairments that affect both the innate and adaptive immune systems, such as impaired phagocyte and lymphocyte activity with zinc deficiency, or compromised development of neutrophils, macrophages and NK cells with vitamin A deficiency.
“micronutrient deficiencies cause specific immune impairments that affect both the innate and adaptive immune systems, such as impaired phagocyte and lymphocyte activity with zinc deficiency, or compromised development of neutrophils, macrophages and NK cells with vitamin A deficiency [50].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [50] Bresnahan, 2014, Undernutrition, the acute phase response to infection, and its effects on micronutrient status indicators, Adv. Nutr. source
Not checked in the free run.
May combine two claims.
PremisecitationThe incidence of common cold is lowest in adolescents compared with all other age groups, but increases in adults aged 20-30 years.
“The incidence of common cold is lowest in adolescents compared with all other age groups, but increases in adults aged 20–30 years [45]; the risk is likely to be greater in those who come into close contact with children, who are at highest risk.”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [45] Monto, 1974, Acute respiratory illness in an American community: The Tecumseh study, JAMA source
Not checked in the free run.
May combine two claims.
InterpretationreasoningThese factors, alone or in combination, weaken the immune system in adults and can increase the risk of infection.
“These factors, alone or in combination, weaken the immune system in adults and can increase the risk of infection.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationSleep is an important homeostatic regulator of immune function and plays a specific role in immunological memory.
“Sleep is an important homeostatic regulator of immune function and plays a specific role in immunological memory [58].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [58] Besedovsky, 2012, Sleep and immune function, Eur. J. Physiol. source
Not checked in the free run.
May combine two claims.
PremisecitationBreastmilk contains various immunological components such as antibodies (e.g., antigen-specific IgA), anti-inflammatory cytokines and other antimicrobial factors, but also most of the micronutrients necessary to support neonatal development, including of the immune system.
“Breastmilk contains various immunological components such as antibodies (e.g., antigen-specific IgA), anti-inflammatory cytokines and other antimicrobial factors, but also most of the micronutrients necessary to support neonatal development, including of the immune system [49,71].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
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- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationIn industrialized countries, influenza-associated deaths occur most often among people aged 65 years or older.
“Although influenza is not a life-threatening illness in most adults [67], in industrialized countries, influenza-associated deaths occur most often among people aged 65 years or older [46].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [46] World Health Organization (2018, April 28). Influenza (Seasonal). Available online: http://www.who.int/mediacentre/factsheets/fs211/en/.
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May combine two claims.
PremisecitationMicronutrient deficiencies are prevalent in infants and preschool children in developing and low- to middle-income countries, and this age group is at the highest risk of multiple micronutrient deficiencies.
“Nevertheless, micronutrient deficiencies are prevalent in infants and preschool children in developing and low- to middle-income countries (e.g., [17,79,80,81,82]), and this age group is at the highest risk of multiple micronutrient deficiencies [83].”
Quote in the paperNot a substantial claim0 of 6 sources checked- cites [17] World Health Organization, and Food and Agricultural Organization of the United Nations (2006). Part 2. Evaluating the public health significance of micronutrient malnutrition. Guidelines on Food Fortification with Micronutrients, World Health Organization.
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- cites [79] Marasinghe, 2015, Micronutrient status and its relationship with nutritional status in preschool children in urban Sri Lanka, Asia Pac. J. Clin. Nutr.
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- cites [80] Luo, 2015, Micronutrient deficiencies and developmental delays among infants: Evidence from a cross-sectional survey in rural China, BMJ Open source
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- cites [81] Özden, T.A., Gökçay, G., Cantez, M.S., Durmaz, Ö., İşsever, H., Ömer, B., and Saner, G. (2015). Copper, zinc and iron levels in infants and their mothers during the first year of life: A prospective study. BMC Pediatr., 15. source
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- cites [82] 2016, Micronutrient deficiencies in normal and overweight infants in a low socio-economic population in north-east Brazil, Paediatr. Int. Child Health source
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- cites [83] Bailey, 2015, The epidemiology of global micronutrient deficiencies, Ann. Nutr. Metab. source
Not checked in the free run.
May combine two claims.
PremisecitationHuman milk is a poor source of iron and zinc and the needs of the child cannot be met by breast milk alone for zinc, or beyond six months for iron.
“However, human milk is a poor source of iron and zinc and the needs of the child cannot be met by breast milk alone for zinc, or beyond six months for iron [72].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [72] Butte, N., Lopez-Alarcon, M., and Garza, C. (2017, December 12). Nutrient Adequacy of Exclusive Breastfeeding for the Term Infant during the First Six Months of Life. Available online: http://apps.who.int/iris/handle/10665/42519.
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May combine two claims.
PremisecitationThe concentrations of certain micronutrients in breastmilk (e.g., calcium, magnesium, and copper) are regulated by maternal homeostatic mechanisms (i.e., independent of maternal nutritional status and diet) to ensure they are sufficient to meet infant needs and to protect them against deficiency or excess.
“The concentrations of certain micronutrients in breastmilk (e.g., calcium, magnesium, and copper) are regulated by maternal homeostatic mechanisms (i.e., independent of maternal nutritional status and diet) to ensure they are sufficient to meet infant needs [72] and to protect them against deficiency or excess [71,73,74,75].”
Quote in the paperNot a substantial claim0 of 5 sources checked- cites [72] Butte, N., Lopez-Alarcon, M., and Garza, C. (2017, December 12). Nutrient Adequacy of Exclusive Breastfeeding for the Term Infant during the First Six Months of Life. Available online: http://apps.who.int/iris/handle/10665/42519.
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- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
- cites [73] Vahter, 2012, Metals and trace element concentrations in breast milk of first time healthy mothers: A biological monitoring study, Environ. Health
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- cites [74] Lowe, 2010, Nutritional requirements during lactation. Towards European alignment of reference values: The EURRECA network, Matern. Child Health
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- cites [75] Kominiarek, 2016, Nutrition recommendations in pregnancy and lactation, Med. Clin. N. Am. source
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May combine two claims.
PremisecitationChildren do not need micronutrients in the same intakes as adults, and lower amounts are adequate to fulfill their various roles throughout the body, including within the immune system.
“Children do not need micronutrients in the same intakes as adults [78] (Table 2), and lower amounts are adequate to fulfill their various roles throughout the body, including within the immune system.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [78] Institute of Medicine (2011). Dietary Reference Intakes for Calcium and Vitamin D, The National Academies Press.
Not checked in the free run.
May combine two claims.
PremisecitationIn babies and infants, breast milk is the major nutritional influence and is formulated to ensure that nutritional needs are met.
“In babies and infants, breast milk is the major nutritional influence and is formulated to ensure that nutritional needs are met [49,71].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [49] Calder, P., Prescott, S., and Caplan, M. (2007). Scientific Review: The Role of Nutrients in Immune Function of Infants and Young Children, Mead Johnson & Company. Emerging Evidence for Long-Chain Polyunsaturated Fatty Acids.
Not checked in the free run.
- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
May combine two claims.
PremisecitationThe excretion of fat- and water-soluble micronutrients (e.g., vitamin A, and vitamins B1, B2, B6, B12, and C, respectively) into breast milk is dependent on maternal intake and varies worldwide.
“In contrast, the excretion of fat- and water-soluble micronutrients (e.g., vitamin A, and vitamins B1, B2, B6, B12, and C, respectively) into breast milk is dependent on maternal intake and varies worldwide [71,74,75].”
Quote in the paperNot a substantial claim0 of 3 sources checked- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
- cites [74] Lowe, 2010, Nutritional requirements during lactation. Towards European alignment of reference values: The EURRECA network, Matern. Child Health
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- cites [75] Kominiarek, 2016, Nutrition recommendations in pregnancy and lactation, Med. Clin. N. Am. source
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May combine two claims.
PremisecitationVitamins A (and beta carotene), C, D, B2, and B12, folic acid, iron, zinc and selenium are just some micronutrients that have immunomodulatory and/or antioxidant effects and thus influence the susceptibility of a host to infectious diseases, as well as the course and outcome of infection.
“Vitamins A (and beta carotene), C, D, B2, and B12, folic acid, iron, zinc and selenium are just some micronutrients that have immunomodulatory and/or antioxidant effects and thus influence the susceptibility of a host to infectious diseases, as well as the course and outcome of infection [70].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [70] Bhaskaram, 2002, Micronutrient malnutrition, infection, and immunity: An overview, Nutr. Rev. source
Not checked in the free run.
May combine two claims.
PremisecitationImmune defenses can be impaired by undernutrition, which increases susceptibility to infection.
“Immune defenses can be impaired by undernutrition, which increases susceptibility to infection [4,5,70].”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [4] Alpert, 2017, The role of vitamins and minerals on the immune system, Home Health Care Manag. Pract. source
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- cites [5] Calder, 2013, Conference on ‘Transforming the nutrition landscape in Africa’. Plenary Session 1: Feeding the immune system, Proc. Nutr. Soc. source
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- cites [70] Bhaskaram, 2002, Micronutrient malnutrition, infection, and immunity: An overview, Nutr. Rev. source
Not checked in the free run.
May combine two claims.
PremisecitationAlthough the recommended dietary allowances for older people indicate that their energy needs are lower than their younger counterparts, micronutrient requirements are mostly the same.
“Although the recommended dietary allowances for older people indicate that their energy needs are lower than their younger counterparts, micronutrient requirements are mostly the same [78] (Table 2).”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [78] Institute of Medicine (2011). Dietary Reference Intakes for Calcium and Vitamin D, The National Academies Press.
Not checked in the free run.
May combine two claims.
PremisecitationMany older people have chronic health conditions requiring hospitalization, live in care homes, or tend to eat less and make different food choices (e.g., choosing low nutrient density, often cheaper, and foods).
“Many older people have chronic health conditions requiring hospitalization, live in care homes, or tend to eat less and make different food choices (e.g., choosing low nutrient density, often cheaper, and foods) [99,100].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [99] Montgomery, 2014, Micronutrient needs of the elderly, Nutr. Clin. Pract. source
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- cites [100] Drenowski, 2001, Impact of aging on eating behaviors, food choices, nutrition, and health status, J. Nutr. Health Aging
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May combine two claims.
PremisecitationAn adequate supply of micronutrients that affect the thymus is also important; for example, even marginal zinc deficiency is known to result in thymic atrophy and can increase the risk of infection.
“An adequate supply of micronutrients that affect the thymus is also important; for example, even marginal zinc deficiency is known to result in thymic atrophy and can increase the risk of infection [97].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [97] Savino, 2010, Nutritional imbalances and infections affect the thymus: Consequences on T-cell-mediated immune responses, Proc. Nutr. Soc. source
Not checked in the free run.
May combine two claims.
PremisecitationA low vitamin C status also increases susceptibility to infections such as pneumonia, possibly because low levels of antioxidants such as vitamin C are unable to counteract the oxidative stress observed in pneumonia.
“A low vitamin C status also increases susceptibility to infections such as pneumonia [71], possibly because low levels of antioxidants such as vitamin C are unable to counteract the oxidative stress observed in pneumonia [104].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
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- cites [104] Hemilä, H. (2017). Vitamin C and infections. Nutrients, 9. source
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Classified as probably not a substantial claim.
PremisecitationIt is especially important to ensure that antioxidant levels (e.g., vitamins C, E, and A) and micronutrients that are components of antioxidant enzymes (e.g., zinc, copper, iron, and selenium) are sufficient to combat the oxidative stress that is induced by many lifestyle factors common in this group, and which has great impact on immune function.
“It is especially important to ensure that antioxidant levels (e.g., vitamins C, E, and A) and micronutrients that are components of antioxidant enzymes (e.g., zinc, copper, iron, and selenium) are sufficient to combat the oxidative stress that is induced by many lifestyle factors common in this group, and which has great impact on immune function [10,23,35,36,44].”
Quote in the paperSubstantial claim0 of 5 sources checked- cites [10] Haryanto, 2015, Multivitamin supplementation supports immune function and ameliorates conditions triggered by reduced air quality, Vitam. Miner.
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- cites [23] Brodin, 2017, Human immune system variation, Nat. Rev. Immunol. source
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- cites [35] Ventura, 2017, Immunosenescence in aging: Between immune cells depletion and cytokines up-regulation, Clin. Mol. Allergy source
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- cites [36] Pawelec, 2017, Does the human immune system ever really become “senescent”?, F1000Research source
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- cites [44] Fulop, 2017, Immunosenescence and inflamm-aging as two sides of the same coin: Friends or foes?, Front. Immunol. source
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May combine two claims.
PremisecitationZinc deficiency can increase thymic atrophy, decrease lymphocyte number and activity, and increase oxidative stress and inflammation by altering cytokine production.
“For example, zinc deficiency can increase thymic atrophy, decrease lymphocyte number and activity, and increase oxidative stress and inflammation by altering cytokine production [14,97].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [14] Micronutrient Information Center (2018, April 17). Immunity in Depth. Available online: http://lpi.oregonstate.edu/mic/health-disease/immunity.
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- cites [97] Savino, 2010, Nutritional imbalances and infections affect the thymus: Consequences on T-cell-mediated immune responses, Proc. Nutr. Soc. source
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May combine two claims.
PremisecitationAn adequate amount of all micronutrients is required for optimal immune function in adolescents and adults (and throughout life), but in higher amounts compared with infants and children.
“An adequate amount of all micronutrients is required for optimal immune function in adolescents and adults (and throughout life), but in higher amounts compared with infants and children [78] (Table 2).”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [78] Institute of Medicine (2011). Dietary Reference Intakes for Calcium and Vitamin D, The National Academies Press.
Not checked in the free run.
May combine two claims.
PremisecitationMenopause affects utilization of micronutrients; for example, vitamin C gradually decreases as menopause advances, correlated negatively to body mass index.
“Furthermore, menopause affects utilization of micronutrients; for example, vitamin C gradually decreases as menopause advances, correlated negatively to body mass index [102].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [102] Wiacek, 2013, Menopause and age-driven changes in blood level of fat- and water-soluble vitamins, Climacteric source
Not checked in the free run.
May combine two claims.
PremisecitationThe skin of older adults is less able to synthesize vitamin D, and synthesis is about 75% slower in people aged 65 years than in younger adults.
“The skin of older adults is less able to synthesize vitamin D, and synthesis is about 75% slower in people aged 65 years than in younger adults [17].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [17] World Health Organization, and Food and Agricultural Organization of the United Nations (2006). Part 2. Evaluating the public health significance of micronutrient malnutrition. Guidelines on Food Fortification with Micronutrients, World Health Organization.
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
PremisecitationWorldwide, the three most common deficiencies are for iron, vitamin A and iodine, but zinc deficiencies are also common.
“Worldwide, the three most common deficiencies are for iron, vitamin A and iodine [84], but zinc deficiencies are also common [83].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [84] Allen, L., de Benoist, B., Dary, O., and Hurrell, R. (2006). Food and Agricultural Organization of the United Nations. Part I. The role of food fortification in the control of micronutrient malnutrition. Guidelines on Food Fortification with Micronutrients, World Health Organization.
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- cites [83] Bailey, 2015, The epidemiology of global micronutrient deficiencies, Ann. Nutr. Metab. source
Not checked in the free run.
May combine two claims.
PremisecitationMicronutrient deficiencies are common in older people; it has been estimated that 35% of those aged 50 years or older in Europe, USA and Canada have a demonstrable deficiency of one or more micronutrients.
“However, micronutrient deficiencies are common in older people; it has been estimated that 35% of those aged 50 years or older in Europe, USA and Canada have a demonstrable deficiency of one or more micronutrients [33].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
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May combine two claims.
PremisecitationThe available data suggest that, even in industrialized countries, some infants who are breastfed may not be receiving optimal amounts of certain micronutrients, as the levels found in breastmilk, maternal serum or urine did not always reach recommended levels in all women.
“The available data suggest that, even in industrialized countries, some infants who are breastfed may not be receiving optimal amounts of certain micronutrients, as the levels found in breastmilk, maternal serum or urine did not always reach recommended levels in all women [73,85,86,87,88,89,90,91,92,93,94,95].”
Quote in the paperNot a substantial claim0 of 10 sources checked- cites [73] Vahter, 2012, Metals and trace element concentrations in breast milk of first time healthy mothers: A biological monitoring study, Environ. Health
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- cites [85] Mackey, 1999, Maternal folate status during extended lactation and the effect of supplemental folic acid, Am. J. Clin. Nutr. source
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- cites [86] Houghton, 2007, How well do blood folate concentrations predict dietary folate intakes in a sample of Canadian lactating women exposed to high levels of folate? An observational study, BMC Pregnancy Childbirth source
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- cites [87] Gellert, 2017, Breastfeeding woman are at higher risk of vitamin D deficiency than nonbreastfeeding women - insights from the German VitaMinFemin study, Int. Breastfeed. J.
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- cites [88] Milman, 2012, Vitamin D status during normal pregnancy and postpartum. A longitudinal study in 141 Danish women, J. Perinat. Med. source
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- cites [89] Dawodu, 2014, Heightened attention to supplementation is needed to improve the vitamin D status of breastfeeding mothers and infants when sunshine exposure is restricted, Matern. Child Health
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- cites [90] Hannan, 2009, Maternal milk concentration of zinc, iron, selenium, and iodine and its relationship to dietary intakes, Biol. Trace Elem. Res. source
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- cites [91] Charlton, 2012, Poor knowledge and practices related to iodine nutrition during pregnancy and lactation in australian women: Pre- and post-iodine fortification, Nutrients source
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- cites [92] Mulrine, 2010, Breast-milk iodine concentration declines over the first 6 mo postpartum in iodine-deficient women, Am. J. Clin. Nutr. source
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- cites [93] Valent, 2011, Maternal diet and selenium concentration in human milk from an Italian population, J. Epidemiol. source
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Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.
InterpretationreasoningIn young children, mainly in industrialized countries, deficiencies may occur because many micronutrients (e.g., vitamin C and B vitamins) are found in fruit and green, leafy vegetables and children are often fussy about what they eat.
“In young children, mainly in industrialized countries, deficiencies may occur because many micronutrients (e.g., vitamin C and B vitamins) are found in fruit and green, leafy vegetables and children are often fussy about what they eat.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationAn insufficient intake of micronutrients in older people has been reported both in the community (vitamins A, B12, D and zinc) and at a higher prevalence in long-term care facilities (vitamins A, D, and E), while lower food intake has been associated with lower intakes of calcium, iron, zinc, B vitamins and vitamin E in older people.
“An insufficient intake of micronutrients in older people has been reported both in the community (vitamins A, B12, D and zinc) and at a higher prevalence in long-term care facilities (vitamins A, D, and E) [101], while lower food intake has been associated with lower intakes of calcium, iron, zinc, B vitamins and vitamin E in older people [100].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [101] High, 2001, Nutritional strategies to boost immunity and prevent infection in elderly individuals, Clin. Infect. Dis. source
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- cites [100] Drenowski, 2001, Impact of aging on eating behaviors, food choices, nutrition, and health status, J. Nutr. Health Aging
Not checked in the free run.
May combine two claims.
PremisecitationVitamin D intake is usually inadequate in most age groups worldwide, even in countries with mandatory food fortification, which can increase the risk of infection, especially respiratory tract infections.
“Vitamin D intake is usually inadequate in most age groups worldwide, even in countries with mandatory food fortification [98], which can increase the risk of infection, especially respiratory tract infections [71].”
Quote in the paperNot a substantial claim0 of 2 sources checked- cites [98] Palacios, 2014, Is vitamin D deficiency a major global public health problem?, J. Steroid Biochem. Mol. Biol. source
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- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
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May combine two claims.
PremisecitationMarginal zinc deficiency is common in older people, as their dietary intakes are generally lower and plasma zinc concentrations decline with age, possibly connected to impaired absorption, alterations in cellular uptake, and epigenetic dysregulation of DNA methylation or the methionine/transsulfuration pathway.
“Marginal zinc deficiency is common in older people, as their dietary intakes are generally lower and plasma zinc concentrations decline with age, possibly connected to impaired absorption, alterations in cellular uptake, and epigenetic dysregulation of DNA methylation or the methionine/transsulfuration pathway, for example [14].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [14] Micronutrient Information Center (2018, April 17). Immunity in Depth. Available online: http://lpi.oregonstate.edu/mic/health-disease/immunity.
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May combine two claims.
PremisecitationImmunological benefits of zinc supplementation help to reduce the incidence of infections such as common cold, cold sores and influenza, as well as the incidence and morbidity of pneumonia.
“immunological benefits that help to reduce the incidence of infections such as common cold, cold sores and influenza [120], as well as the incidence and morbidity of pneumonia [121].”
Quote in the paperSubstantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationIn young males with marginal vitamin C deficiency, supplementation was shown to reduce the incidence of common cold and the duration of cold symptoms compared with placebo, accompanied by improved activity levels.
“For example, in young males with marginal vitamin C deficiency, supplementation was shown to reduce the incidence of common cold and the duration of cold symptoms compared with placebo, accompanied by improved activity levels [109].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [109] Johnston, 2014, Vitamin C supplementation slightly improves physical activity levels and reduces cold incidence in men with marginal vitamin C status: A randomized controlled trial, Nutrients source
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May combine two claims.
PremisecitationMicronutrient supplementation with higher levels of vitamins C, E and beta-carotene increased the number of various subsets of T-cells, enhanced lymphocyte response to mitogen, increased IL-2 production and NK-cell activity, increased the response to the influenza virus vaccine, and led to fewer days of infection.
“while micronutrient supplementation with higher levels of vitamins C, E and beta-carotene increased the number of various subsets of T-cells, enhanced lymphocyte response to mitogen, increased IL-2 production and NK-cell activity, increased the response to the influenza virus vaccine, and led to fewer days of infection [118].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [118] Chandra, 1992, Effect of vitamin and trace-element supplementation on immune responses and infection in elderly subjects, Lancet source
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May combine two claims.
PremisecitationSupplementation with a complex micronutrient formulation in older people increased the number of various types of immune cells, including total lymphocytes, and induced a shift from memory T cells to naïve T cells.
“Supplementation with a complex micronutrient formulation in older people increased the number of various types of immune cells, including total lymphocytes, and induced a shift from memory T cells to naïve T cells [119].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [119] Schmoranzer, 2009, Influence of a complex micronutrient supplement on the immune status of elderly individuals, Int. J. Vitam. Nutr. Res. source
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May combine two claims.
PremisecitationSupplementation with vitamin D can protect against respiratory tract infections and reduce the risk of acute respiratory illness and influenza, especially with once-daily dosing.
“Supplementation with vitamin D can protect against respiratory tract infections and reduce the risk of acute respiratory illness and influenza, especially with once-daily dosing [112,113,114,115].”
Quote in the paperSubstantial claim0 of 4 sources checked- cites [112] Yamshchikov, 2009, Vitamin D for treatment and prevention of infectious diseases: A systematic review of randomized controlled trials, Endocr. Pract. source
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- cites [113] Charan, 2012, Vitamin D for prevention of respiratory tract infections: A systematic review and meta-analysis, J. Pharmacol. Pharmacother. source
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- cites [114] Bergman, P., Lindh, Å., Björkhem-Bergman, L., and Lindh, J. (2013). Vitamin D and respiratory tract infections: A systematic review and meta-analysis of randomized controlled trials. PLoS ONE, 8. source
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- cites [115] Martineau, 2017, Vitamin D supplementation to prevent acute respiratory infections: Systematic review and meta-analysis of individual participant data, BMJ source
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Probably not a substantial claim: may not pass S2 (checkable). May combine two claims.
InterpretationreasoningThere is a rationale for micronutrient supplementation to restore concentrations to recommended levels, especially after an infection, and to support immune function and maintenance.
“Considering the importance of micronutrients in immunity, and the fact that many people of all ages have single or multiple micronutrient deficiencies that can have detrimental immunological effects, there is a rationale for micronutrient supplementation to restore concentrations to recommended levels, especially after an infection, and to support immune function and maintenance.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationVitamin C shortened the duration of a cold in children (especially with higher doses) and reduced the severity of symptoms; a greater effect was observed in children compared with adults, including a greater prophylactic effect of vitamin C.
“Similar results have been observed with vitamin C, which shortened the duration of a cold in children (especially with higher doses) and reduced the severity of symptoms; a greater effect was observed in children compared with adults, including a greater prophylactic effect of vitamin C [105].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [105] Hemilä, H., and Chalker, E. (2013). Vitamin C for preventing and treating the common cold. Cochrane Database Syst. Rev., Available online: https://www.cochranelibrary.com/cdsr/doi/10.1002/14651858.CD000980.pub4/full. source
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May combine two claims.
PremisecitationBoth zinc and vitamin C may also improve the outcome of pneumonia, malaria and diarrheal infections in children.
“Both zinc and vitamin C may also improve the outcome of pneumonia, malaria and diarrheal infections in children [9].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [9] Wintergerst, 2006, Immune-enhancing role of vitamin C and zinc and effect on clinical conditions, Ann. Nutr. Metab. source
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May combine two claims.
PremisecitationZinc can reduce both the risk and duration of pneumonia in children, help to manage infantile diarrhea, lead to fewer episodes of malaria, and reduce the duration of diarrhea.
“Zinc can also reduce both the risk and duration of pneumonia in children, help to manage infantile diarrhea, lead to fewer episodes of malaria, and reduce the duration of diarrhea [3,17,71].”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [3] Maggini, 2017, Vitamins C., D and zinc: Synergistic roles in immune function and infections, Vitam. Miner. source
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- cites [17] World Health Organization, and Food and Agricultural Organization of the United Nations (2006). Part 2. Evaluating the public health significance of micronutrient malnutrition. Guidelines on Food Fortification with Micronutrients, World Health Organization.
Not checked in the free run.
- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
May combine two claims.
PremisecitationMultiple micronutrient supplementation in older people may also reduce antibiotic usage and lead to higher post-vaccination immune responses.
“Multiple micronutrient supplementation in older people may also reduce antibiotic usage and lead to higher post-vaccination immune responses [33].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [33] Chandra, 2002, Nutrition and the immune system from birth to old age, Eur. J. Clin. Nutr. source
Not checked in the free run.
May combine two claims.
PremisecitationIn those under physical stress (e.g., at work, during sports, and under extreme temperatures), or in cases where vitamin C levels are slightly below recommended levels, vitamin C supplementation reduces common cold incidence.
“In those under physical stress (e.g., at work, during sports, and under extreme temperatures) [104], or in cases where vitamin C levels are slightly below recommended levels, vitamin C supplementation reduces common cold incidence.”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [104] Hemilä, H. (2017). Vitamin C and infections. Nutrients, 9. source
Not checked in the free run.
May combine two claims.
PremisecitationVitamin D deficiency increases the risk of infection and autoimmune diseases such as multiple sclerosis and diabetes, probably related to activity of vitamin D receptors, which are found throughout the immune system.
“Vitamin D deficiency increases the risk of infection and autoimmune diseases such as multiple sclerosis and diabetes, probably related to activity of vitamin D receptors, which are found throughout the immune system [106,107].”
Quote in the paperNot a substantial claim0 of 2 sources checkedMay combine two claims.
PremisecitationIn children with vitamin A deficiency, supplementation can decrease the risk of morbidity and mortality from infectious diseases, and reduce the incidence of diarrhea and measles.
“In children with vitamin A deficiency, supplementation can decrease the risk of morbidity and mortality from infectious diseases [77], and reduce the incidence of diarrhea and measles [14,71].”
Quote in the paperSubstantial claim0 of 3 sources checked- cites [77] Pettifor, J., and Zlotkin, S. (2004). Impact of micronutrient deficiencies on immune function. Micronutrient Deficiencies during the Weaning Period and the First Years of Life, Proceedings of the 54th Nestlé Nutrition Workshop, Pediatric Program, São Paulo, Brazil, 26–30 October 2003, Nestlé Nutrition Institute Workshop Series. source
Not checked in the free run.
- cites [14] Micronutrient Information Center (2018, April 17). Immunity in Depth. Available online: http://lpi.oregonstate.edu/mic/health-disease/immunity.
Not checked in the free run.
- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
May combine two claims.
InterpretationreasoningDistinct immune features are present during each life stage, and specific factors differentially affect immune function, with a resulting difference in the type, prevalence and severity of infections with age.
“Distinct immune features are present during each life stage, and specific factors differentially affect immune function, with a resulting difference in the type, prevalence and severity of infections with age.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationSupplementation with vitamin E in older people has been shown to significantly improve NK cytotoxic activity, neutrophil chemotaxis and the phagocytic response, and enhance mitogen-induced lymphocyte proliferation and IL-2 production.
“Supplementation with vitamin E in older people has been shown to significantly improve NK cytotoxic activity, neutrophil chemotaxis and the phagocytic response, and enhance mitogen-induced lymphocyte proliferation and IL-2 production [123].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [123] Hernanz, 2008, Vitamin E ingestion improves several immune functions in elderly men and women, Free Radic. Res. source
Not checked in the free run.
Probably not a substantial claim: may not pass S3 (load-bearing).
PremisecitationThere are some reports that an adequate zinc supply could prevent degenerative age-related diseases including infection and cancer.
“There are some reports that an adequate zinc supply could prevent degenerative age-related diseases including infection and cancer [122].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [122] Mocchegiani, 2013, Zinc: Dietary intake and impact of supplementation on immune function in elderly, Age (Dordr.) source
Not checked in the free run.
May combine two claims.
PremisecitationVitamin E can also improve T-cell-mediated immunity and increase the production of antibodies in response to the hepatitis B and tetanus vaccines.
“Vitamin E can also improve T-cell-mediated immunity and increase the production of antibodies in response to the hepatitis B and tetanus vaccines [124].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [124] Meydani, 1997, Vitamin E supplementation and in vivo immune response in healthy elderly subjects. A randomized controlled trial, JAMA source
Not checked in the free run.
May combine two claims.
Interpretationnone givenThe available clinical data suggest that micronutrient supplementation can reduce the risk and severity of infection and support a faster recovery.
“The available clinical data suggest that micronutrient supplementation can reduce the risk and severity of infection and support a faster recovery.”
Quote in the paperNot a substantial claimProbably not a substantial claim: may not pass S2 (checkable).
InterpretationreasoningCurrent knowledge regarding the importance of micronutrients in immunity, the effects of micronutrient deficiencies on the risk and severity of infection, and the worldwide prevalence of an inadequate micronutrient status form a sound basis for the use of a targeted multiple micronutrient supplement to support immunity over a person's lifetime.
“Nevertheless, current knowledge regarding the importance of micronutrients in immunity, the effects of micronutrient deficiencies on the risk and severity of infection, and the worldwide prevalence of an inadequate micronutrient status form a sound basis for the use of a targeted multiple micronutrient supplement to support immunity over a person’s lifetime.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationAdequate vitamin C intakes can optimize cell and tissue levels and help to protect against respiratory and systemic infections (e.g., reduced duration and severity of pneumonia).
“Adequate vitamin C intakes can optimize cell and tissue levels and help to protect against respiratory and systemic infections (e.g., reduced duration and severity of pneumonia [71]), while higher levels are required during infection to compensate for the increased inflammatory response and metabolic demand induced by the pathogen, and thus help to reduce the duration and severity of symptoms [12]”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [71] Prentice, 2017, They are what you eat: Can nutritional factors during gestation and early infancy modulate the neonatal immune response?, Front. Immunol. source
Not checked in the free run.
Probably not a substantial claim: may not pass S2 (checkable).
InterpretationreasoningTailored supplementation based on the specific needs of each age group may help to provide an adequate basis for optimal immune function.
“Tailored supplementation based on the specific needs of each age group may help to provide an adequate basis for optimal immune function.”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationThe risk of upper respiratory tract infections, especially common cold, was significantly lower after vitamin E supplementation in nursing home residents, although there was no apparent effect on lower respiratory tract infections.
“The risk of upper respiratory tract infections, especially common cold, was significantly lower after vitamin E supplementation in nursing home residents, although there was no apparent effect on lower respiratory tract infections [125].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [125] Meydani, 2004, Vitamin E and respiratory tract infections in elderly nursing home residents: A randomized controlled trial, JAMA source
Not checked in the free run.
May combine two claims.
Interpretationnone givenA common factor throughout life is the need for an adequate supply of micronutrients, which play key roles in supporting immune function.
“A common factor throughout life is the need for an adequate supply of micronutrients, which play key roles in supporting immune function.”
Quote in the paperSubstantial claimMay combine two claims.
PremisecitationSufficient vitamin C is also important in older people, who are at risk of vitamin C deficiency, especially females.
“Sufficient vitamin C is also important in older people, who are at risk of vitamin C deficiency, especially females [96].”
Quote in the paperNot a substantial claim0 of 1 sources checked- cites [96] Elmadfa, 2009, European Nutrition and Health Report, Forum Nutr. source
Not checked in the free run.
Probably not a substantial claim: may not pass S4 (based). May combine two claims.
Interpretationnone givenMultiple micronutrient deficiencies are common throughout the world, with the likelihood increasing with age.
“Multiple micronutrient deficiencies are common throughout the world, with the likelihood increasing with age.”
Quote in the paperNot a substantial claimMay combine two claims.
Interpretationnone givenThe immune system undergoes many changes over the life course-developing and maturing during childhood, potentially achieving peak function in early adulthood, and gradually declining in most people in older age.
“The immune system undergoes many changes over the life course—developing and maturing during childhood, potentially achieving peak function in early adulthood, and gradually declining in most people in older age (Figure 3).”
Quote in the paperNot a substantial claimMay combine two claims.
PremisecitationHigher levels of vitamin C are required during infection to compensate for the increased inflammatory response and metabolic demand induced by the pathogen, and thus help to reduce the duration and severity of symptoms.
“while higher levels are required during infection to compensate for the increased inflammatory response and metabolic demand induced by the pathogen, and thus help to reduce the duration and severity of symptoms [12].”
Quote in the paperSubstantial claim0 of 1 sources checked- cites [12] Carr, A., and Maggini, S. (2017). Vitamin C and immune function. Nutrients, 9. source
Not checked in the free run.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
There is a mutual interaction between nutrition, intake of particular bioactive dietary components, immune function, and inflammatory status, hence a close relation with the hallmarks of immunosenescence.
“There is a mutual interaction between nutrition, intake of particular bioactive dietary components, immune function, and inflammatory status, hence a close relation with the hallmarks of immunosenescence (78, 79).”
From Immunosenescence and Its Hallmarks: How to Oppose Aging Strategically? A Review of Potential Options for Therapeutic Intervention (2019) · cites this paper as [78]
Vitamin supplementation studies in older adults have demonstrated a role for vitamin E in the production of IL-2 and activation-induced T cell proliferation in naïve but not memory T cells.
“Vitamin supplementation studies in older adults have demonstrated a role for vitamin E in the production of IL-2 as well as the activation induced T cell proliferation in naïve but not in memory T cells (78, 113–115).”
From Immunosenescence and Its Hallmarks: How to Oppose Aging Strategically? A Review of Potential Options for Therapeutic Intervention (2019) · cites this paper as [78]
Zinc deficiency can cause decreased levels of serum thymulin, a zinc-dependent peptide hormone produced by thymic epithelial cells, whose activity is progressively reduced with age and peaks in pre-adolescence.
“Zinc deficiency can cause decreased levels of serum thymulin, a zinc dependent peptide hormone produced by thymic epithelial cells, with an activity that is progressively reduced with age, with a peak in pre-adolescence (78, 104, 108).”
From Immunosenescence and Its Hallmarks: How to Oppose Aging Strategically? A Review of Potential Options for Therapeutic Intervention (2019) · cites this paper as [78]
Micronutrients, such as vitamins and minerals, are essential for the efficient performance of the immune system.
“Micronutrients, such as vitamins and minerals, are essential for the efficient performance of the immune system.”
From Immunosenescence and Its Hallmarks: How to Oppose Aging Strategically? A Review of Potential Options for Therapeutic Intervention (2019) · cites this paper as [78]
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
Each contradiction between two passages listed here was confirmed by an independent check.
Two age groups are each said to have the lowest common-cold incidence
MinorThe paper says common-cold incidence is lowest in adolescents compared with all other age groups, but later says it is lowest in people over 60.
“The incidence of common cold is lowest in adolescents compared with all other age groups, but increases in adults aged 20–30 years [45]”
“the incidence of common cold has been shown to be the lowest those aged over 60 years [45]”
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Vitamin E ingestion improves several immune functions in elderly men and women
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- Authors
- Maggini, S., Pierre, A., & Calder, P. C.
- Affiliations
- Bayer (Switzerland) (CH)
- University Hospital Southampton NHS Foundation Trust (GB)
- Corresponding author
- Maggini, Silvia
- ORCID
- Calder, Philip C.
- Venue
- Nutrients
- Publisher
- MDPI AG
- Published
- 2018-10-17
- Volume
- 10
- Issue
- 10
- Pages
- 1531
- ISSN
- 2072-6643 (ISSN-L)
- PMC
- PMC6212925
- OpenAlex
- W2896405623
- Semantic Scholar
- b93fafebc799638441e7ae3092a570553f272f87
- Cited by
- 710
- References
- 116
- Citations by year
- 2026: 36 · 2025: 73 · 2024: 88 · 2023: 102 · 2022: 150 · 2021: 131 · 2020: 107 · 2019: 21 · 2017: 1 · 2016: 1
- FWCI
- 11.76
- Type
- journal article
- Language
- en
- Open access
- gold
- dx.doi.org
- Licence
- Locations
- Nutrients (publishedVersion, cc-by)
- Europe PMC (PubMed Central) (publishedVersion, other-oa)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- ePrints Soton (University of Southampton) (acceptedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Topics
- Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutrition and Health Studies
- Health Sciences › Nursing › Nutrition and Dietetics › Trace Elements in Health
- Health Sciences › Medicine › Physiology › Nutrition and Health in Aging
- Keywords
- immune function, micronutrient requirements, micronutrient deficiency, infection risk, aging, life course, immunocompetence, vitamin supplementation, iron, selenium, zinc, folic acid, B vitamins, vitamin C, vitamin D, vitamin E, nutritional status
- MeSH terms
- Aging, Humans, Immunity, Infections, Nutritional Requirements, Nutritional Status, Trace Elements, Vitamins, Micronutrients, Dietary Supplements
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-10.
Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-10.
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