Equivit Endura-Max is a dietary electrolyte supplement for endurance horses. When endurance horses sweat, they lose a significant amount of essential electrolytes (particularly sodium, chloride, potassium, calcium and magnesium) that are necessary for top performance and prevention of metabolic disorders. Endura-Max is formulated with readily available sources of key electrolytes lost in sweat during exercise, especially in hot, humid environments.