Sports Nutrition What are Nuun Electrolyte Tablets? By Elizabeth Quinn, MS Elizabeth Quinn, MS Elizabeth Quinn is an exercise physiologist, sports medicine writer, and fitness consultant for corporate wellness and rehabilitation clinics. Learn about our editorial process Updated on November 26, 2020 Medically reviewed Verywell Fit articles are reviewed by board-certified physicians and nutrition and exercise healthcare professionals. Medical Reviewers confirm the content is thorough and accurate, reflecting the latest evidence-based research. Content is reviewed before publication and upon substantial updates. Learn more. by Jonathan Valdez, RDN, CDCES, CPT Medically reviewed by Jonathan Valdez, RDN, CDCES, CPT Facebook Twitter Jonathan Valdez, RDN, CDCES, CPT is a New York City-based telehealth registered dietitian nutritionist and nutrition communications expert. Learn about our Medical Review Board Print Amazon Table of Contents View All Table of Contents What is Nuun? Ingredients Taste Nuun Active Hydration electrolyte replacement tablets offer athletes a unique carbohydrate-free fluid replacement. For athletes who prefer a non-sugary sports drink that contains only the electrolytes you need to replace, without the calories, sugar, or carbs of other sports drinks, nuun may be the best choice. Drop one nuun tablet into a standard-sized water bottle and you will replace the key electrolytes without the calories of most other sports drinks. Nuun Provides Hydration Without Calories You may prefer nuun to other sports drinks on the days that you exercise at a moderate or high intensity for an hour or two. You may not want or need to add as many carbs or sugar as are in the typical sports drink, but you should replace electrolytes, particularly if it's hot and humid and you are sweating quite a bit. Sports drinks can be a bit too sugary sweet you may prefer to decide when and what calories you consume during training or racing. You may want to eat your calories during a long-distance bike ride and wash them down with some nuun rather than have a completely liquid diet of another sugary sports drink. Nuun tablets provide a light flavor and no sugar. That makes it work well in plastic water bottles or hydration packs because it rinses clean and doesn't build up a sticky residue in the bottles. Keeping Hydrated During Your Runs What's in Nuun Tablets? Each nuun tablet contains the following active ingredients: Sodium (carbonates): 360.0 milligrams Potassium (bicarbonate): 100.0 milligrams Calcium (carbonate): 12.5 milligrams Magnesium (sulfate): 25.0 milligrams Vitamin C: 37.5 milligrams Vitamin B2: 500 micrograms Calories: 10 Sugar: 1 gram The American College of Sports Medicine recommends that athletes replace sweat losses with fluids during activity. But, because individual sweat rates vary so much, it's hard to recommend a specific amount of sodium or other electrolytes. At baseline, sweat rates are between 0.5-2 liters every hour. In order to avoid hyponatremia, replacing lost sodium is also recommended in long bouts of exercise. The recommendation is 300-600 mg of sodium per hour or 1.7-2.9 g of salt for longer durations of exercise. Nuun provides 700 mg of sodium per liter (as two tablets are suggested per liter) so it should be able to meet the sodium needs for the average exerciser over a long workout. Because nuun doesn't contain much carbohydrate, which slows the rate of stomach emptying, it is absorbed faster into the body than sports drinks with added carbohydrates. Keep in mind that people who are active for more than 60-90 minutes may also need to replace depleted carbohydrates (glycogen stores), which could result in 'the dreaded bonk, or "hitting the wall" during exercise. Taking nuun alone won't meet this need—you'll still require adequate calories to fuel your working muscles. Also, be aware if you are on a low-sodium diet that you may need to check with your physician before adding nuun to your diet. How Does It Taste? Nuun is light and refreshing. None of the flavors are too heavy or sweet, and compared to traditional carbohydrate-loaded drinks, nuun is easy to drink no matter how long you've been exercising. Besides the original lemon+lime, nuun offers citrus fruit, tri-berry, tropical fruit, watermelon, strawberry lemonade, orange, lime, grape, wild berry, mango orange, and cherry limeade. One tube contains 12 tablets and costs approximately $7.00 and you can generally get a discount when you buy in bulk. All in all, nuun is a great alternative to other calorie-loaded sports drinks. The Best Sports Drinks, According to a Dietitian 1 Source Verywell Fit uses only high-quality sources, including peer-reviewed studies, to support the facts within our articles. Read our editorial process to learn more about how we fact-check and keep our content accurate, reliable, and trustworthy. Kerksick, C.M., Wilborn, C.D., Roberts, M.D. et al. ISSN exercise & sports nutrition review update: research & recommendations. J Int Soc Sports Nutr 15, 38 (2018). https://doi.org/10.1186/s12970-018-0242-y Additional Reading Simpson MR, Howard T. Selecting and Effectively Using Hydration for Fitness. American College of Sports Medicine. 2011. By Elizabeth Quinn, MS Elizabeth Quinn is an exercise physiologist, sports medicine writer, and fitness consultant for corporate wellness and rehabilitation clinics. See Our Editorial Process Meet Our Review Board Share Feedback Was this page helpful? Thanks for your feedback! What is your feedback? Other Helpful Report an Error Submit