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Vitamin B12Energy and Metabolism500 mcg Per CapsuleVitamin SupplementPromote energy and cardiovascular health with Swanson Vitamin B12! This essential vitamin helps form red blood cells that deliver oxygen to all parts of the body which in turn promotes energy. It also supports cardiovascular health by working with vitamin B6 and folic acid to help neutralize harmful homocysteine. While adequate B12 intake is important for everyone supplementation may be particularly helpful for some people because the vitamin is found primarily in animal-based foods.