"DOUBLE STRENGTH!! CHEWABLE!!! MSM TOO!!! 1-800-PetMeds Super Joint Enhancer is a natural daily dietary supplement to ease joint pain and improve joint function. Active ingredients 400 mg chondroitin, 500 mg glucosamine, 100 mg MSM, and 5 mg manganese improve flexibility and mobility as a part of the joint rebuilding formula. Joint Enhancer comes in a bone shaped pork liver flavor tablet dogs love."