Glucosamine (C6H13NO5) is also called as glucosamine, glucamine, or aminoglucose, which is a kind of compound after a hydroxyl of glucose is replaced by amidogen. Glucosamine is an important precursor in protein or fat glycosylation reaction. Glucosamine derivative N-acetylglucosamine is a monomer of chitin, and chitin is widely existed in exoskeleton and fungal cell wall of arthropods. Another derivative N- acetyl muramic acid is the basis of bacterial cell wall. Glucosamine is one of monosaccharide with the most abundant content in nature. In industry, glucosamine is formulated with the use of exoskeleton of shellfishes. Glucosamine is generally used as food for cure of osteoarthritis.

Glucosamine hydrochloride is extracted from natural chitin, and it a kind of marine organism agent and the basis of chondroitin sulfate. It can promote composition of human body’s mucopolysaccharide, enhance viscidity of synovial fluid, and improve metabolism of cartilago articularis, which is in favor of repairing cartilago articularis, with obvious diminish inflammation and abirritatic effects. It can promote injection effects of antibiotics, be treated as nutrition assistant of diabetic patients, cure enteritis in place of cortisol, and have certain curative effects on curing rheumatic arthritis and hepatitis B. In addition, it can be used as additives of cosmetics, feed, and food. Therefore, glucosamine hydrochloride is popular in the international market.