Med-Vet Magnesium 5,000™ SupplementThis muscle supplement is high in magnesium to aid in muscle and nerve function while also having positive effects on bones, the immune system and heart. Features Include: Helps support healthy muscle function and glucose metabolism Maintains muscle and nerve function, heart, immune system, and bone health A symptom of magnesium deficiency is anxiety, so this can have a calming effect on horses Magnesium is also involved in energy metabolism and