GOOD HEALTH GUIDES: Published regularly to give you the newest and best available information on health topics of major importance, written by leading physicians and other health practitioners, researchers and expert reporters. Glucosamine and the chondroitin sulfates are chondroprotective agents. They improve the repair of cartilage, protect against damage, and arrest and can even reverse the many conditions afflicting the parts of the body that depend on cartilage for their health and integrity, especially the joints. This guide is for those who suffer from arthritic conditions, joint pains, or joint injuries.