Quest Glucosamine Sulphate 1500mg is a high strength glucosamine supplement. Glucosamine is key to the maintenance of healthy joints, bones, muscles, tendons and ligaments. Glucosamine is used by the body to form cartilage. Cartilage prevents the joints and bones from rubbing together. Serious exercise and old age can cause our natural levels of glucosamine to deplete. It is therefore necessary to supplement this deficiency. It is particularly important for serious sports competitors who wish to avoid injury. This supplement is gluten, wheat and yeast free.