Effervescent Electrolyte Supplement. Natural flavor. 1 g sugar. 15 calories. Vegan. Gluten free. Non GMO Project verified. nongmoproject.org. For exercise. Packed with complete electrolytes, Nuun is your go-the-extra-mile water. Packed with complete electrolytes, Nuun is your go-the-extra-mile water. Plop. Fizz. Drink. Go! Hydration you can feel. Complete electrolytes. (These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.)