Cited by 468Nutritional Studies and DietAgriculture Sustainability and Environmental ImpactNutrition and Health Studies

Intake and adequacy of the vegan diet. A systematic review of the evidence

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Bakaloudi, Dimitra Rafailia, Halloran, Afton, Rippin, Holly L., Oikonomidou, Artemis Christina, Dardavesis, Theodoros I., Williams, Julianne, Wickramasinghe, Kremlin, Breda, Joao +1 more·2021·Clinical Nutrition

Abstract

Background: Vegan diets, where animal-and all their by-products are excluded from the diet, have gained popularity, especially in the last decade.However, the evaluation of this type of diet has not been well addressed in the scientific literature.This study aimed to investigate the adequacy of vegan diets in European populations and of their macro-and micronutrient intakes compared to World Health Organization recommendations.Methods: A systematic search in PubMed, Web of Science, IBSS, Cochrane library and Google Scholar was conducted and 48 studies (12 cohorts and 36 cross-sectional) were included.Results: Regarding macronutrients, vegan diets are lower in protein intake compared with all other diet types.Veganism is also associated with low intake of vitamins B 2 , Niacin (B 3 ), B 12 , D, iodine, zinc, calcium, potassium, selenium.Vitamin B 12 intake among vegans is significantly lower (0.24e0.49mg, recommendations are 2.4 mg) and calcium intake in the majority of vegans was below recommendations (750 mg/d).No significant differences in fat intake were observed.Vegan diets are not related to deficiencies in vitamins A, B 1 , В 6 , C, E, iron, phosphorus, magnesium, copper and folate and have a low glycemic load.Conclusions: Following a vegan diet may result in deficiencies in micronutrients (vitamin B 12 , zinc, calcium and selenium) which should not be disregarded.However, low micro-and macronutrient intakes are not always associated with health impairments.Individuals who consume a vegan diet should be aware of the risk of potential dietary deficiencies.

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Crossref · 10.1016/j.clnu.2020.11.035

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  • A vegan dietary pattern can sometimes limit specific nutrients, such as vitamin B12, iron, and calcium.

    “However, sometimes a vegan dietary pattern can limit specific nutrients, such as vitamin B12, iron, and calcium.15,16”
  • In the general population, individuals following a vegan diet consume fewer calories compared with individuals following omnivorous/vegetarian diets.

    “However, a recent systematic review concluded that in the general population, individuals following a vegan diet consume fewer calories compared with individuals following omnivorous/vegetarian diets [48].”

    From Nutritional Considerations for the Vegan Athlete (2023) · cites this paper as [48]

  • Vegans consume greater amounts of PUFAs compared with omnivores.

    “Vegans consume greater amounts of PUFAs compared with omnivores [48].”

    From Nutritional Considerations for the Vegan Athlete (2023) · cites this paper as [48]

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Research works printed but not linked: 2

  1. Chen Z, Zuurmond MG, van der Schaft N, Nano J, Wijnhoven HAH, Ikram MA, et al. Plant versus animal based diets and insulin resistance, prediabetes and type 2 diabetes. Rotterdam Study 2018;33:883e93.
  2. Prasad AS. Clinical, endocrinological and biochemical effects of zinc defi- ciency. Clin Endocrinol Metabol 1985;14:567e89.

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Authors
Bakaloudi, D. R., Halloran, A., Rippin, H. L., Oikonomidou, A. C., Dardavesis, T. I., Williams, J., Wickramasinghe, K., Breda, J., & Chourdakis, M.
Affiliations
  • Aristotle University of Thessaloniki (GR)
  • University of Copenhagen (DK)
  • World Health Organization Regional Office for Europe (DK)
Corresponding author
  • Bakaloudi, Dimitra Rafailia
  • Halloran, Afton
  • Rippin, Holly L.
  • Oikonomidou, Artemis Christina
  • Dardavesis, Theodoros I.
  • Williams, Julianne
  • Wickramasinghe, Kremlin
  • Chourdakis, Michail
Venue
Clinical Nutrition
Publisher
Elsevier BV
Published
2021-05
Volume
40
Issue
5
Pages
3503-3521
ISSN
0261-5614 (ISSN-L)
OpenAlex
W3112845174
Cited by
466
References
129
Citations by year
2026: 72 · 2025: 110 · 2024: 101 · 2023: 96 · 2022: 68 · 2021: 19
FWCI
7.66
Type
journal article
Language
en
Open access
Locations
  • Clinical Nutrition (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Research at the University of Copenhagen (University of Copenhagen) (publishedVersion, cc-by-nc-nd)
Funders
World Health Organization
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Physical Sciences › Environmental Science › Ecology › Agriculture Sustainability and Environmental Impact
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutrition and Health Studies
Keywords
vegan diet, nutritional adequacy, micronutrient intake, macronutrient intake, vitamin B12 deficiency, calcium intake, zinc, selenium, dietary fat, glycemic load, dietary deficiency, European populations
MeSH terms
Diet, Vegan, Nutrients, Adolescent, Adult, Aged, Europe, Female, Humans, Male, Middle Aged, Nutritive Value, Vitamins, Young Adult

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