NUPRO Joint & Immunity Support Dog Health Supplement adds Glucosamine Complex, MSM, and Ester-C to enrich our Original 'Gold' Formula, especially for the Active and/or Senior animal. Your dog now has the benefit of a scientifically balanced combination of select ingredients specifically formulated to support normal joint structure, function and flexibility as well as promote optimal overall health and well-being. NUPRO Joint & Immunity Support helps to maintain the health and resiliency of joints, muscles and connective tissues, and to ease discomfort associated with normal daily exercise and active lifestyles.NUPRO Joint & Immunity Support is not just for Senior Dogs or those who may have joint issues! Active athletes (agility dogs, surfing dogs, dock-diving dogs, weight pulling dogs), show dogs, working dogs (police, arson, search and rescue K-9s), sled dogs, hunting dogs, herding dogs, AND large breed dogs, as well, will benefit from the addition of Glucosamine to their daily regimen. NUPRO Joint & Immunity Support's combination of raw, unprocessed ingredients with the added extras makes for a superior product from which ALL adult dogs will reap the rewards!