UltraCruz Equine MSM Supplement for Horses is a natural source of non-metallic sulfur that supports both bone and joint health. Horses in training and competition, as well as those requiring additional joint support, may benefit from this supplement. MSM is a source of organic sulfur, which is required for a number of functions in the body. It has been shown that MSM helps aid in the health of collagen and cartilage. For additional joint support, we recommend adding UltraCruz Equine Glucosamine Sulfate Supplement for Horses and UltraCruz Equine Chondroitin Sulfate Supplement for Horses to your horse's supplement routine. All of these supplements may be safely fed together to support equine joint health.