This supplement has been specially developed to replenish the losses of moisture/sweat in horses in the right proportions. Sodium plays an important role in fluid balance. Chlorides are also present in this mixture (sodium chloride, potassium chloride and calcium chloride). These are very important because a horse loses a lot of chlorides while sweating. Chlorides attract positive ions such as sodium and potassium. It regulates the acid-base balance in the body. Potassium is administered in the form of potassium chloride. This is important for maintaining cell pressure and, together with sodium, affects nerve and muscle function. Calcium, in the form of calcium chloride, plays an important role in muscle contractions. In addition, this mixture also contains two important pillars that make this mixture more unique than a standard electrolyte mixture. The first of these is betaine. Betaine activates important body substances, is important for the nervous system and is also important for the synthesis of carnitine (which has an influence on endurance). The second pillar is the addition of zinc, copper and manganese in the form of glycinates.