Cosequin is the number 1 veterinarian recommended joint health supplement brand*. Cosequin A.S.U. is veterinarian formulated with avocado/soybean unsaponifiables (A.S.U.) 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.