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