Glucosamine and Choindroitin are well known and important substances in the body. These substances are mostly found in the tissues of the the tendons, cartilage and muscles (ligaments). Glucosamine is often combinated with MSM (organic form of sulfur) and chondoitin. Together they are a real powerhouse. Normally the body produces enough of these substances, but when the body get older it gets less efficient in producing it. We sell many high quality products with natural substances. Keep in mind that we also sell many other nutritional supplements, all the supplements you need on a daily basis.