Magnesium Supplements for Horses

View a list of the best magnesium supplements for horses in Mad Barn’s equine feed database. Magnesium is an essential mineral commonly used to support muscle function, nervous system health, relaxation, metabolic health, and normal insulin sensitivity. These products may come as powders or pellets and can vary widely in elemental magnesium concentration, source, serving size, and form. Ingredients used may include magnesium oxide, magnesium citrate, magnesium sulfate, magnesium chloride, and chelated magnesium. Compare products, dosages, and cost per serving to find a supplement that fits your horse’s nutritional needs.