Study of vegan food surveys

Vegan Food Consumption Surveys

They are few scientific surveys upon the real food consumption of the vegans, but two of them stand out for their relevance & methodology

  • The EPIC-Oxford survey : following the daily diets of 65 500 adult persons (including 18 900 vegans) over 2 years (Key & Al -2006 – health effect of vegetarian & vegan diets)
  • The Peter Clarys & al (Free University of Brussels and EVA – Ethical Vegetarian Alternative) in 2012 with a panel of 1475 people (Vegans et Omnivorous)

Oxford Epic : daily consumption per type (abstract)

Univ Bruxelles
Daily Consumption

Based upon those two scientific surveys, we observe for the Vegan consumers (vs the omnivorous)

  • A higher/better HEI -Healthy Eating Index- (not a surprise !) see for explanation:
  • A higher/better fiber consumption
  • A lower Protein intake. Enough in average to cover the basic adult requirement. however approximately 1/3 of the vegan consumers have a lower intake than the recommendation. this proportion may be higher for people with specific needs : seniors, youngs etc.
  • A significant deficit in Vit B 12
  • Average intakes of Calcium lower than the almost 1gr/day target (taking into account the individual variations, this also mean that 30/40% of the Vegans have a structural too low supply of calcium, a serious long term risk for adults, a true issue for youngs, seniors and pregnant women)
  • The Iron paradox : Vegans have higher intakes of iron than omnivores, which is largely sufficient in theory. However, because of the low digestibility of non-blood iron (difficult to predict) (only 10% of intake on average), this level of ingestion is not a guarantee of satisfactory levels of iron in the body . This is why an annual check of iron levels in the blood is strongly recommended and a supplementation equivalent to the RDA useful, without risk.

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