Quote:
Originally Posted by Baraka_Guru
Where does the bacteria come from?
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Gut flora generally comes from two sources: the environment and initial colonization via colostrum and milk. However, where the bacteria comes from is not nearly as relevant as what these animals have that we do not: a rumen. Until we have a stomach that allows us to ferment what we eat, we're not going to be able to produce our own B12. Further, a cow must eat a food source with cobalt in it to be able to produce B12.