Joint Support Palatable Soft Chews for Dogs. Recommended to support healthy joint function in dogs. Active Ingredients per soft chew: BIOVAFLEX™ Egg Shell Membrane (chicken egg shells) 66 mg Hyaluronic Acid (as Sodium Hyaluronate) 8 mg Boswellia serrata Extract (containing 65% Boswellic Acids) 5 mg Vitamin D3 (cholecalciferol) 50 IU