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Handling unapproved research chemicals without clinical oversight carries severe health and regulatory risks
BMC Genomics 17 , 740 (2016)
Your body doesn't make B12 on its own, you get it from animal foods (meat, fish, eggs, dairy) or from supplementation
B12 is Found Naturally in Animal Products Vitamin B12 is produced almost exclusively by bacteria and is concentrated in animal foods: beef and lamb (highest density), fish and shellfish (especially salmon, trout, clams), dairy, and eggs
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