The Hygain Regain Horse Supplement makes it easy to replace the electrolytes that your horse loses during exercise. This supplement includes sodium， chloride， potassium， magnesium and calcium， which your horse loses through sweating. Sodium and chloride are essential electrolytes， while potassium and magnesium play important roles in how your horse’s body functions. You can feed this supplement daily for horses in training or in hot climates， and you can also use it to support a dehydrated horse.