Folic add or riboflavin is vitamin B2 and has iron. Cyanocobalamin or cobalamin is vitamin B12 and has cobalt in its structure. Cytochrome is any of a group of proteins each with an iron containing haem group. Ascorbic acid or vitamin C is a colourless, crystalline water soluble vitamin found spedally in ritrus fruits and green vegetables. Its defiriency can lead to scurvy. Its chemical composition is C6H8O6. It does not consist of any metal.