Should people on vegetarian and vegan diets use a B12 supplement?
A. Probably. Vitamin B12 is found in significant quantities only in animal foods which include all varieties of meat, organ meat, fish and dairy products. Fermented foods like tempeh, common in vegetarian diets, claim to contain B12 however scientists aren’t convinced that these foods have a useable form of vitamin B12. People on vegetarian and vegan diets should consider supplementing with vitamin B12 and/or a vitamin B complex product.