SUPER KIDS MULTIVITAMIN LOLLIPOP A, C, D, B12 Vitamins, selenium and zinc contribute to the normal function of the immune system. Vitamins B1, B2 and B6 contribute to normal energy-yielding metabolism. Biotin, zinc, niacin contribute to the maintenance of normal skin, while vitamin C contributes to the normal collagen formation necessary for the normal function of the skin. Vitamin D contributes to the maintenance of normal muscle function, bones and teeth.