Glucosamine, M S M, Chondroitin Sulphate, Calcium Carbonate, Vitamin D3 which are the essential nutrients synthesised by our body to maintain the bone strength and flexibility of joints. Rebone is the only formulation containing all essential bone nutrients and minerals in single tablet.Chondroitin Sulphate : Contains large no.of aminosugar, protects the existing cartilages from premature breakdown.