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Wrong.

B12 is produced in nature only by prokaryotes in the form of certain bacteria and archaea; it is not made by any multicellular or single-celled eukaryotes.

Grazing animals pick up B12 and bacteria that produce it from the soil at the roots of the plants they eat.

https://en.wikipedia.org/wiki/Vitamin_B12#Bacteria

my point was that humans source for B12 is animal meat consumption not where B12 is produced

Do you know how there's B12 in animals? Because of SUPPLEMENTS. This is because the natural way of getting B12 is through dirt - dirt on veg, or second hand dirt that animals ate, but mostly through first hand dirt because we didn't actually eat that much meat back in the day. However, because of all out hyper-clean food now, even the animals people eat have to be given it through supplements. That doesn't sound very natural either to me. Vegans just get their supplements first hand.

Wrong. Simply put - B12 is found in bacteria in soil (where herbivores continue to get it). You would too, if you grew your own veg. But now all your lettuce gets washed in chlorine, packed in plastic and sold in supermarkets. So yeah, unless you grow your own, supplements are advised. But that proves nothing about the intentions of nature. Show me please the length of your small intestine compared with that of a cat, teeth, agility.... looking a lot like herbivores aren't we?

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