Abstract: The present invention relates to the use of an organic glucosamine salt selected from glucosamine glucuronate, glucosamine ascorbate, glucosamine malate, glucosamine hydrogen malate, glucosamine citrate, glucosamine hydrogen citrate, and glucosamine dihydrogen citrate for the preparation of a medicament for the treatment of arthrosis and inflammation and pain associated with arthrosis. The present invention also relates to the use of an organic glucosamine salt, selected from the ones mentioned above, for the preparation of a nutritional supplement acting as a chondroprotector, to nourish the cartilage, protect the joints, prevent water deficit in the tissues that form the joint, improve the joints' functional capacity, elasticity, and flexibility, and prevent and revert the physical overexertion syndrome in athletes, and the effects associated therewith.