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BMJ 2011;343:d5928

Because of its role in energy metabolism, its sometimes called the energy vitamin. Most Popular The best sources of B12 are organ meats like liver and kidney, as well as beef, fish, shellfish, chicken, dairy products and eggs, Yourman says

Loss of Msr B1 perturbs spatial learning and long-term potentiation/long-term depression in mice

Chronic niacin deficiency leads to pellagra, a condition now rare in developed countries due to its association with poor nutrition, resulting from low intake of niacin or tryptophan (, , )