MASTERDOG GSM-AKTIVE Carefully composed components support the metabolism of the joints and provide for strong joints. Additional protein from linseed expeller supports the energy supply and improves the performance efficiency. GSM-Active doesn’t contain any doping relevant ingredients making it an optimal nutrient provision for sport dogs. An optimal supply of natural glycosaminoglycans from the green lipped mussel, improve joint metabolism. Mussel concentrate and linseed ensures a supply of omega-3 fatty acids. Additional silica encourages the growth and production of healthy cartilage-, connective- and tendon tissue and the production of synovial fluid; vitamin C supports the structure of collagen and vitamin E supports cell metabolism.