Top up your electrolyte levels with this replenishing formula, powered by sodium, potassium? and magnesium*. Perfect for use during intense training sessions. In two refreshing flavours - lemon and forest berries - 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