Glucosamine sulfate (GS) __La GS, substance present naturally in the body, is the main precursor of constituents essential cartilage. It has a role in the maintenance and the resistance of the cartilage. Arthrobiane GS is extracted from chitin present in the shells of crustaceans: shrimps (Penaeus merguiensis, ou Penaeus indicus, Penaeidae, Natantia) and wild lobsters (Panulirus stimpsoni) not OGM.___La chondroitin sulfate (CS) __La CS is a constituent of the cartilaginous matrix, participates in its elasticity and hydration. It is present in the natural state in the cartilage of shark or Ray. The CS of Arthrobiane comes from shark cartilage (not protected species: Greatblue shark, Alopias vulpinus-max, Sphyrna zygaena).