* With Manganese and Vitamin C * Supports Joint Health * Dietary Supplement Glucosamine + Chondroitin Combination provides efficacious quantities of glucosamine sulfate and chondroitin sulfate, combined with vitamin C and manganese for optimizing joint health. Glucosamine and chondroitin sulfate are essential components of joint tissue involved in the production of hyaluronic acid, which is an important component of the synovial fluid that lubricates the joints, and major component of the connective tissue in the skin. Vitamin C and Manganese are required for the synthesis of collagen and cartilage. Jarrow Formulas Glucosamine + Chondroitin Combination is Joint Sustain nutrition, providing a Sodium Free form of GS stabilized with only potassium chloride (KCI).