No Wheat No Corn No Artificial Ingredients** 5 Beneficial Ingredients Including All the Health Benefits of the Perna Mussel For Use in Dogs Only For All Dogs Quality Seal - NASC - National Animal Supplement Council Why It Works Glucosamine - Supports lubrication of the joints, flexibility and mobility Perna - Ingredients naturally found in perna enhance the healthy functions of joint and connective tissue MSM - A source of sulfur, which supports maintenance of connective tissue function Chondroitin Sulfate - Supports the proper structure and function of healthy connective tissues and joints **No artificial colors, dyes or harmful preservatives.