Ultra Cruz Equine MSM 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 enhance the functions of joint and connective tissue and possibly stimulates the production of proteoglycans, which help maintain the health and resiliency of joints and connective tissue. Msm is a popular dietary supplement for Horses that can be fed as a single agent or in combination with other supplements.