[moistbar]

> In all, 52% of vegans, 7% of vegetarians and one omnivore were classified as vitamin B12 deficient (defined as serum vitamin B12 < 118 pmol/l). [0]

[0] http://www.epic-oxford.org/publications/1554/serum-concentra...

No, they are not "clearly deficient while eating meat" as you claim. There's a documented B12 deficiency in vegans and vegetarians that isn't present in meat eaters.

[kapp_in_life]

Cherry picking one vitamin deficiency in vegans. Omnivores are deficient in other vitamins. The answer is supplementing, not changing foods you eat.

> Omnivores had the lowest intake of Mg, vitamin C, vitamin E, niacin and folic acid. Vegans reported low intakes of Ca and a marginal consumption of the vitamins D and B12.

https://pubmed.ncbi.nlm.nih.gov/26502280/

[moistbar]

I wasn't talking about those vitamins. I was talking about B12, which we largely get from meat...meat being the original topic.