Cosequin is the #1 veterinarian recommended joint health supplement brand*. Cosequin ASU is veterinarian formulated with avocado/soybean unsaponifiables (ASU), glucosamine, chondroitin sulfate, methylsulfonylmethane (MSM), and boswellia serrata extract to provide joint health support for equine athletes regardless of discipline or performance level. When performance matters, choose Cosequin. Joint Health Support for Horses: This supplement is formulated with glucosamine, chondroitin sulfate, methylsulfonylmethane (MSM), and avocado/soybean unsaponifiables (ASU) to support joint health. Powered by ASU: The combination of ASU, glucosamine, and chondroitin found in Cosequin ASU have been shown to be more effective supporting joint health than either glucosamine or chondroitin sulfate alone in cell culture studies. Easy to Serve: Cosequin?ASU Pellets combine our scientifically researched, proprietary ingredients into a tasty, tiny pellet preferred by horses and horse owners. Formulated for Your Horse: ASU complements the positive effects of the glucosamine and chondroitin sulfate in Cosequin ASU, providing broad spectrum joint support for the equine athlete. Backed by Science: Nutramax Laboratories Veterinary Sciences supplements are veterinarian formulated with high-quality ingredients to support your horse's joint health, no matter their discipline or performance level.*Survey conducted among equine veterinarians who recommended oral joint health supplements.