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And, our metabolism depends on Vitamin B12, which is ONLY made by bacteria. Every plant and animal that needs B12 has to get it by eating something else with B1

And, our metabolism depends on Vitamin B12, which is ONLY made by bacteria. Every plant and animal that needs B12 has to get it by eating something else with B12 in it, or having the bacteria responsible in it's digestive tract. https://en.wikipedia.org/wiki/Vitamin_B12 https://en.wikipedia.org/wiki/Vitamin_B12

alexmingoia 6y ago
It’s far from being fully understood. The Wikipedia article isn’t accurate. Many animals including humans have been found to have B12 producing bacteria in the small intestine. B12 producing bacteria has been found in human small intestine as far back as 1980: https://pubmed.ncbi.nlm.nih.gov/7354869/ https://pubmed.ncbi.nlm.nih.gov/7354869/