Jiaxing Hengjie Biopharmaceutical CO.,Ltd is the GMP Manufacturer of Chondroitin Sulfate Sodium、 Gluconsamine、Collagen、Hyaluronic Acid and Shark Cartilage powder for more than 15 years. http://www.chondroitinpowder.com/ Our lab can do all the items tests by ourself, we supply good quality and service.