Nature Made® Super B-Complex is a combination of eight essential B vitamins (thiamin, riboflavin, niacin, B6, folic acid, biotin, pantothenic acid and B12), which help support the production of cellular energy in the body. B vitamins are also necessary for the normal functioning of the nervous system. Nature Made's Super B-Complex formula also contains vitamin C for antioxidant support and to help support the immune system.