From Optimum Nutrition
Top up your electrolyte levels with this replenishing formula, powered by sodium, potassium▲ and magnesium*. Perfect for use during intense training sessions. Optimum Nutrition Electrolyte powders mix easily in water for a convenient boost to your workouts.* Magnesium contributes to normal muscle function & electrolyte balance▲ Potassium contributes to normal muscle function^ per serving