An accurately balanced electrolyte formula based on actual electrolyte loss in performance horses! Reflects proportions of sodium, chloride, potassium and phosphorus lost through sweat and provides extra amounts of crucial calcium and magnesium for additional protection during prolonged exercise. Improves cationic/anionic balance to help control exercise-induced acidity, which can cause early fatigue and also contains encapsulated direct-fed microbial cultures to help replenish beneficial gut microflora.