Adler Ortho Active No. 8 Cartilage Plus 60 capsulesBiotin, niacin contribute to the maintenance of normal mucous membranes Vitamin A contributes to the maintenance of normal mucous membranes, skin, vision and normal function of the immune system Vitamin C contributes to normal collagen formation for normal cartilage function Zinc contributes to normal vitamin A metabolism and the maintenance of normal vision; helps protect cells from oxidative stress Manganese contributes to the maintenance of normal