I saw the Back pain and figured I'd post this. alot of people know about this stuff, but alot dont. My knees lack some cartilage, and this stuff works great its called Glucosamine Chondroitin, it contains a blend of ingredients including Glucosamine Sulfate and Chondroitin Sulfate to repair damaged joints, replenish essential fatty acids which reduce inflammation and Vitamin C and Manganese to assist in building collagen. You can either buy it at GNC for a BUT LOAD, or go to walmart and save like 50 % for the same stuff!!