Superior formulation, Glucosamine 500mg 2kcl combined with Chondroitin 400mg is cited as being the optimal ingredient balance. Glucosamine is essential to playing a role in the smooth working of cartilage, tendons and ligaments. Combined with Chondroitin, which is found naturally in the cartilage. It helps form a sponge-like substance that acts as a shock absorber. Our Chondroitin is the best quality marine sourced, which is 90% pure.