Glucosamine is a compound naturally found within the cartilage of our joints, made from chains of sugars and proteins bound together. It acts as one of natural shock-absorbents and joint lubricants, allowing us to move around without or less joint, bone and muscle pains. Taking this joint supplement may reduce damage that joints suffers naturally with age. Bone pain, low bone density and a history of fractures can benefit from taking glucosamine HCL, which assists in bone healing. Some evidence suggests that glucosamine helps preserve articular cartilage surrounding bones, decreases pain, increases physical function, and enhances activities in people with bone pains.