you sweat - nuun active replenishes packed with electrolytes, light flavor, no sugars or carbs, and portable, nuun active hydration is the perfect sports drink Contains 12 tablets. each tablet makes one 16 oz. drink and contains 40mg of caffeine.   active ingredients sodium (bicarbonate + carbonate)  potassium (bicarbonate)  magnesium (sulfate)  calcium (carbonate)  vitamin c (as ascorbic acid) Features & benefits packed with electrolytes, light flavor, no sugars or carbs, and portable, nuun active hydration is the perfect sports drink. the electrolytes found in nuun will help alleviate cramps, help muscles function, communicate and burn energy efficiently. nuun active hydration comes in 12 flavors: orange, lemon lime, strawberry lemonade, fruit punch, kona cola, lemon tea, tri-berry, grape, tropical, citrus fruit, watermelon, and lemonade.