MSM is beneficial for improved joint health as it reduces pain and inflammation. MSM also promotes healing of skin, bones, muscles and connective tissue. Glucosamine HCI is a vital building block for producing cartilage. Glucosamine can reduce joint swelling and inflammation and increase mobility especially when combined with Chondroitin. Chondroitin Sulfate is a natural substance that acts like a sponge to draw water into the canine joint cartilage, which helps to cushion the joints.