Zinc is a component of many body enzymes. It contributes to the normal function of the immune system and to the maintenance of normal skin, hair and nails. Iron contributes to normal formation of red blood cells and haemoglobin and to normal Oxygen transport in the body. Folic acid has a role in the process of normal cell division and contributes to normal blood formation. It contributes to maternal tissue growth during pregnancy. Iodine contributes to the normal production of thyroid hormones and normal thyroid function, as well as to maintenance of normal skin.