Glucosamine helps support healthy cartilage and maintain structural integrity of joints and connective tissue. Glucosamine is a building block for joint fluid, cartilage, tendons, ligaments, membrane, and blood vessels. Just three tablets of Schiff Glucosamine HCI provides the clinically tested amount of 1500 milligrams of glucosamine HCl, the highest potency of active glucosamine. While most brands use glucosamine sulfate that is only 65 percent glucosamine, Schiff Glucosamine HCI uses nearly 83 percent glucosamine for a stronger dose of joint support.