Glucosamine Sulphate and Chondroitin Sulphate are naturally occurring bio-chemical constituents found in the body and help to maintain the elasticity and fluidity needed for good joint mobility by stimulating the uptake of water and nutrients into the cartilage. Good joint mobility depends on healthy collagen and, consequently healthy cartilage. Collagen is the main component of ligaments, tendons, cartilages and spinal discs.