Earlier quoted context omitted.
And now for the science: neither people nor animals make their own B12. Instead, we employ good bacteria in our gut to do that (and so do cows). After the discovery of antibiotics, many people in the western world became B12 deficient - especially vegetarians. However cows and other animals are just as incapable of making it - and in the last 30 years or so, just as deficient as humans, as they've also been getting l…
I think if anyone reasonable researches this they'll see that there is still some controversy on the issue (Studies show both sides). I don't have an axe to grind in this argument, so I'm not even going to bother digging that deep, but I'm not entirely convinced. I'm not a meat eater for the sole purpose of getting B12 and dont' try to convince vegans to eat meat with such sad arguments, so I hardly care what the tru…
I've never heard of a study claiming B12 in animals in vivo is not synthesized by bacteria (or archaea). Care to give a reference?
> sorry, It's a fallacy, but I don't like getting my "facts" from programmers and Wikipedia
Programmers, ok. Wikipedia - why? and "dieticians and health professionals" - sorry, most of them have no idea what they are talking about - they are just parroting what they learned. You admit yourself it is a fallacy. What's the point then?
> Anyway, my guess is you are in your early to mid twenties, and probably have only been a vegan for a handful of years, am I right? Give it 20, 30 years and lets see if your B12 levels are still good.
Your guess is very wrong. Been vegetarian for over 35 years (only a few years of those vegan, but not having a B12 source in almost any). And my B12 levels are very good, although they weren't in the past.