Should I take glucosamine supplement for bone injuries like, stress changes to the bone?

Not really for bone. Glucosamine is a component of joint cartilage and some studies have shown natural anti-inflammatory effects and lessened joint pains due to this and other supplements. It may even have some healing effects for cartilage injury. Stress injuries to the bone and decreased bone density have more to do with bone mineralization (calcium and phosphate) and wouldn't be affected directly by glucosamine.
Won't help. Some people feel glucosamine might benefit osteoarthritis or cartilage problems with the joints. Has nothing to do with the bone structure or mass of the bone or healing of bone.

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