Hard glucosamine can be used as precursors for the synthesis and compounds to be named. Glycosaminoglycan This is a key component of cartilage structure. For this reason, the body of people who have been hard glucosamine can produce cartilage to replace the cartilage with a damaged condition. When the cartilage back to the same well. It acts like a cushion to support and protect the bones at the joints that are stiff due to friction. As a result, reduce erosion of the bone and cause of the properties.