Sardine Oil with Green Lipped Mussel & Shark Cartilage consists of Sardine Oil wild-caught, green-lipped mussel and shark cartilage. These are both natural sources of glucosamine and chondroitin which help against osteoarthritis, ED & HD. It also contains pure omega 3 which is good for joint function. This supplement is specially designed for dogs with joint problems. The natural sources of glucosamine sulfate may be able to repair damaged cartilage. The chondroitin sulfate has a positive influence on the shock absorption of the joints and the stimulation of cartilage production. In addition, it may have an anti-inflammatory and analgesic effect.