The Joint Max® Triple Strength proprietary blend was selected to target every aspect of joint health: lubrication, cushioning of tissues, and support of cartilage, connective tissues, and bones. It contains active ingredients Glucosamine, Chondroitin, Vitamin C, Manganese, and Zinc. This powerful joint supplement is intended for older or middle aged large dogs or smaller dogs with maximum joint support needs. Joint MAX carries a 100% product guarantee. You may return the product for a full refund if you are not satisfied for any reason.