The vitamin for vascular health, vim and vigor is Swanson Vitamin B12! Vitamin B12 is commonly associated with energy because it plays a vital role in the formation of the red blood cells that deliver oxygen to all parts of the body. It also supports cardiovascular health by working with vitamin B6 and folic acid to help neutralize 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.