MSM Supplements for Horses

View a list of the best MSM supplements for horses in Mad Barn’s equine feed database. MSM, or methylsulfonylmethane, is a source of organic sulfur commonly used to support joint health, connective tissue integrity, normal inflammatory balance, mobility, and antioxidant status. These products may come as powders, pellets, liquids, or blended joint formulas and can vary widely in MSM concentration, serving size, supporting ingredients, and cost per serving. Ingredients used alongside MSM may include glucosamine, chondroitin sulfate, hyaluronic acid, omega-3 fatty acids, collagen, vitamin C, Boswellia, and antioxidant nutrients. Compare products, dosages, and cost per serving to find a supplement that fits your horse’s nutritional needs.