Glyco-Flex® II softchews are a nutritional supplement used for rebuilding and maintaining healthy joints, specially formulated for dogs that are moderately arthritic. (Pet is sore after exercising and often has difficulty exerting itself after periods of rest.) Contains Perna (green lipped) mussel which is a good source of protein, minerals, and chondroitin sulfates. Glyco-Flex has all the joint maintenance and rebuilding ingredients a pet needs for a healthy and active lifestyle. (Perna Canaliculus , Methylsulfonylmethane , Glucosamine HCl , Brewers Yeast , Stearic Acid , Cellulose , Manganese Amino Acid Chelate , Silicon Dioxide)