Cited by 137Probiotics and Fermented FoodsInfant Nutrition and HealthConsumer Attitudes and Food Labeling

Invited review: Probiotic yogurt quality criteria, regulatory framework, clinical evidence, and analytical aspects

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Nyanzi, Richard, Jooste, Piet J., Buys, Elna M.·2021·Journal of Dairy Science

Abstract

Yogurt is a milk-based product manufactured by lactic acid fermentation enabled by symbiotic yogurt cultures. Yogurt is largely considered to be a health product, and it is employed to deliver probiotics and prebiotics to the consumer. However, not all yogurts are probiotic, neither are they all functional products. There is increasing demand for health-promoting beverages, which is prompting the dairy industry to develop functional probiotic yogurts to meet the demand. However, there seems to be a scarcity of reviews providing critical information on regulatory frameworks in regions of the world, clinical trial outcomes, and methodological approaches for enumerating multiprobiotic strains in yogurt. This review, relating to functional probiotic yogurt, covers the newest information on the topic for the period mostly between 2014 and 2019. Conformance to regulations is paramount and hence, global regulatory frameworks for probiotic yogurt and prebiotic and nonprebiotic ingredients included in yogurt are reviewed. The paper emphasizes the need for convincing clinical trial outcomes that provide the dairy industry with an opportunity to market products with substantiated beneficial claims. The paper also discusses probiotic strains in functional yogurt, which is required to have population levels above the recommended therapeutic minimum during shelf life. The multiprobiotic species added to yogurt may present challenges relating to methodological and analytical approaches needed to determine viability of each strain contained in such yogurt. Hence, the review also presents the pros and cons of the culture-dependent and culture-independent approaches for the enumeration of probiotic cells in yogurt. The review is arguably valuable to the dairy industry, functional food developers, related scientists, and researchers, as well as policy makers.

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  • Yogurt health benefits include preventing osteoporosis and reducing the risk of high blood pressure, antibiotic-associated diarrhea and acute diarrhea in children, vaginal yeast and bacterial infections, and urinary tract infections.

    “The health benefits include preventing osteoporosis and reducing the risk of high blood pressure, antibiotic-associated diarrhea and acute diarrhea in children, vaginal yeast and bacterial infections, and urinary tract infections [187].”

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Research works printed but not linked: 5

  1. Chandan, R. C., A. Gandhi, and N. P. Shah. 2017. Yoghurt: Histori- cal background, health benefits and global trade. In Yoghurt in Health and Disease Prevention. N. P. Shah, ed. Academic Press, London, UK.
  2. Hill, D., R. Ross, E. Arendt, and C. Stanton. 2017. Microbiology of yogurt and bio-yogurts containing probiotics and prebiotics. In Yoghurt in Health and Disease Prevention. N. P. Shah. Academic Press, London, UK. · DOI
  3. IDF (International Dairy Federation). 1995. Fermented and non-fer- mented milk products -detection and enumeration of Lactobacil- lus acidophilus -culture media. Bulletin IDF 306:23-33.
  4. US FDA (Food and Drug Administration). 2019. Code of Federal Reg- ulations Title 21, Volume 2, Revised as of April 1, 2019. Chapter
  5. WHO/FAO. 2011. Codex alimentarius: Codex standards for fermented milks 243-2003. Pages 6-16 in Milk and Milk Products, second edi- tion, World Health Organisation, Food and Agriculture Organisa- tion of the United Nations, Rome, Italy.

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Authors
Nyanzi, R., Jooste, P. J., & Buys, E. M.
Affiliations
  • University of Pretoria (ZA)
  • Tshwane University of Technology (ZA)
Corresponding author
Buys, Elna M.
Venue
Journal of Dairy Science
Published
2021-01
Volume
104
Issue
1
Pages
1-19
ISSN
0022-0302 (ISSN-L)
OpenAlex
W3111413085
Cited by
137
References
106
Citations by year
2026: 13 · 2025: 24 · 2024: 18 · 2023: 37 · 2022: 32 · 2021: 13
FWCI
1.74
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • UpSpace Institutional Repository (University of Pretoria) (submittedVersion, cc-by-nc-nd)
Funders
University of Pretoria
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Health Sciences › Nursing › Nutrition and Dietetics › Infant Nutrition and Health
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Consumer Attitudes and Food Labeling
Keywords
probiotic yogurt, functional foods, probiotic regulation, prebiotics, probiotic viability, lactic acid fermentation, dairy industry
MeSH terms
Animals, Beverages, Fermentation, Humans, Milk, Yogurt, Probiotics, Prebiotics

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