This supplement includes glucosamine (from animal tissues) and methylsulfonyldisulfide (MSM) to support joint function and mobility. It also contains hyaluronic acid, which is absorbable when administered orally, to properly maintain synovial fluid, and endogenous type II collagen to support the immune response. It is recommended for restoring normal joint function and supporting the metabolism of your small friend's joints, especially in cases of osteoarthritis.