cobalamin (vitamin B12)

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cobalamin (vitamin B12)

obtained from seafood, meat and milk products. Intestinal absorption of vitamin B12 requires the presence of the protein known as intrinsic factor, secreted by the stomach. Red blood cell formation depends on vitamin B12 and in the absence of intrinsic factor, B12 deficiency causes pernicious anaemia. Vitamin B12 is promoted as an ergogenic aid to enhance DNA synthesis and increase muscle growth in strength training, but research indicates no effect.