[Vitamin C] Necessary for the normal structure and maintenance of the connective tissue, necessary for the absorption of iron, necessary for protection of cell from free radicals. [Vitamin B1] Necessary for the normal carbohydrates and energy metabolism. [Vitamin B2] Necessary for the energy production in the body. [Vitamin B6] Necessary for the utilization of proteins and amino acids, necessary for the maintenance of normal blood homocysteine levels. [Zinc] Necessary for normal immune function, necessary for normal cell division.