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RE: You Can't Be A Vegetarian
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.
my point was that humans source for B12 is animal meat consumption not where B12 is produced