None of the things you DONT need to stay hydrated as Nuun puts it. Each tube holds 12 tablets containing 360 mg Sodium / 100 mg Potassium / 25 mg Magnesium / 13 mg Calcium. Less than 1g of carbs, fewer than 8 calories. No sugar. No high-fructose corn syrup. No artificial flavors or colors. And they come in dozens of flavors. Pick up a tube at Rye Running Company and try em’ out for your next run or workout.