Hondroitin sulfate is acid mucopolysaccharide(AMPS) extracted from animals cartilage.(shark,bovine,porine,chicken) 
Specific functions as following: 
Chondroitin sulfate is used to treat Neuralgia, nervous hemicrania, arthritis,shoulder joint pain, celiac pain after operation, wound anti blood Coaqulation etc. 
Prevent and treat hearing obstacle caused by streptomycin, have prominent effect for hearing handicap and tinnitus caused by all kinds of noise. 
It is used for auxiliary treatment of chronic nephritis,chronic hepatitis,keratitis and helcoma. 
Chondroitin sulfate is long-term used to prevent and treat coronary disease, angina, miocardial infarction, coronary atherosclerosis,myocardial ischemia, it has no obvious side effect, can evidently reduce morbidity and mortality of coronary disease. It’s found out by long-term clinic usage that the fat on arterial wall and venous wall could be eliminated or reduced effectively, can evidently reduce plasma cholesterol so as to prevent forming atherosclerosis. 
Chondroitin Sulfate(shark) is used in health food, it could active human tissue and cell so as to improve immunity and decelerate aging.