premium 90% grade material not the 20% used by others,bovine sourced chondroitin, rather than from endangered shark species , we use a well-regulated, highly refined material ,made to gmp standards and usp standardschondroitin, a compound found naturally in the body, helps to attract fluid into the cartilage, the tough protein that lines the surfaces of bones. chondroitin is an expensive nutrient, and you have to read labels carefully to check the amount of chondroitin that is present in a product. at nature\'s best, we insist on a premium 90% grade material for our chondroitin, (many companies are still using a low grade 20% material). happily this highly concentrated form means that each of our tablets contains a relevant level at 540mg. chondroitin is typically sourced from shark species but we\'re not entirely satisfied that this is a renewable resource. so to save our shark species, we\'ve chosen to use bovine chondroitin for all our chondroitin supplements as this is simply a by-product of the beef industry and a well-regulated, high quality material.|//b250|