process level: (glucosamine sulfate capsules) crystals, the international leading and most advanced technology. (glucosamine hydrochloride capsule) is backward in technology in the 199s, and tends to decrease < P > Clinical efficacy: (glucosamine sulfate capsule) has been proved to be effective by a large number of medical consultations. There was no significant difference (glucosamine hydrochloride capsule) compared with placebo group < P > Application abroad: Crystalline glucosamine sulfate is the mainstream in developed countries. (glucosamine hydrochloride capsule) is backward in technology and has been eliminated.