Does anyone know if there are studies showing the statistics of Vitamin B deficiency in vegans THAT DO TAKE SUPPLEMENTS (pills or fortified food)?
I searched in Google and in this Forum, but all the studies I find were done with vegans that weren't taking supplements (it's possible that I have overlooked, though)
This information is necessary because some people say that the B12 supplements may as well not be bioavailable/active for humans and that only the "natural" vitamin B12 - the one you get from meat - can be effectively used by the body.
Thank you
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