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Coconut water benefits come mostly from what is in it: a cup of fresh coconut water has about 46 calories and 600 milligrams of potassium, around 13% of the Daily Value, plus some sodium and magnesium, according to USDA data. Small trials in young, active adults found it rehydrated about as well as a sports drink after exercise, with no performance edge and more bloating for some people. Its potassium is also its main caution, because people with kidney disease or on certain blood pressure medicines can build up too much. Below are the USDA coconut water nutrition facts, the sports drink research and who should be careful.
Peptide Labs does not sell coconut water. This article is general nutrition information, not medical advice.
Key Takeaways
- One cup of fresh coconut water has about 46 calories, 6 grams of sugars and 600 milligrams of potassium in USDA data.
- Packaged unsweetened coconut water in USDA data has less sodium and potassium than fresh, so labels vary.
- Five small trials found coconut water rehydrated about as well as sports drinks or water, without better performance.
- People with kidney disease or who take ACE inhibitors, ARBs or potassium-sparing diuretics should ask before drinking it often.
- Coconut water is not coconut milk or coconut oil; it is the clear liquid inside young coconuts.
Coconut water nutrition per cup
Coconut water is the thin, clear liquid inside a coconut, usually taken from young green coconuts. It is different from coconut milk, which is made from the grated flesh, and from coconut oil or MCT oil, which are fats. The table compares two USDA FoodData Central entries per 1-cup serving, with percent Daily Values (%DV) based on the FDA Daily Values used on Nutrition Facts labels.
| Nutrient per cup | Fresh coconut water (FDC 170174) | Packaged, unsweetened (FDC 174831) |
|---|---|---|
| Calories | 46 | 44 |
| Carbohydrate | 8.9 g (3% DV) | 10.4 g (4% DV) |
| Sugars | 6.3 g | 9.6 g |
| Potassium | 600 milligrams (13% DV) | 404 milligrams (9% DV) |
| Sodium | 252 milligrams (11% DV) | 64 milligrams (3% DV) |
| Magnesium | 60 milligrams (14% DV) | 15 milligrams (4% DV) |
| Calcium | 58 milligrams (4% DV) | 17 milligrams (1% DV) |
| Vitamin C | 5.8 milligrams (6% DV) | 24 milligrams (27% DV) |
The two entries differ more than you might expect. Coconut water composition changes with coconut variety and maturity, and some brands add vitamin C, so the label on your carton is the number to trust. Coconut water potassium is the standout in both: a cup ranks alongside many fruits on our list of potassium-rich foods. The sugars are naturally present in unsweetened versions; sweetened and flavored versions add more.
Coconut water benefits for hydration: what trials found
The most studied use is rehydration after exercise. These trials are small, short and mostly in young men, so they show how coconut water performs in a lab setting rather than in every situation.
- Kalman and colleagues, 2012 (Journal of the International Society of Sports Nutrition): 12 trained men lost about 2% of body weight on a treadmill, then drank bottled water, coconut water, coconut water from concentrate or a sports drink. Fluid retention and later exercise time did not differ, but the men reported more bloating and stomach upset with coconut water.
- Ismail and colleagues, 2007: 10 men exercised in the heat. Fresh coconut water rehydrated slightly less than a sports drink (65% vs 68% on the study’s index), while coconut water with added sodium matched the sports drink and caused less nausea.
- Peart and colleagues, 2017: in 10 cyclists, coconut water did not improve hydration markers or time-trial performance compared with plain water, and participants drank less of it because of the taste.
- O’Brien and colleagues, 2023: 19 cyclists drank coconut water or a sports drink with matched calories during a long ride; performance and physiology did not differ meaningfully.
- Bell and Spriet, 2026: in 8 recreational athletes, coconut water and a sports drink both led to less urine output than flavored water, but overall fluid status afterward was not significantly different among the three drinks.
Taken together, coconut water appears to be a reasonable rehydration drink, not a superior one. Sweat is mostly sodium, and packaged coconut water is far higher in potassium than sodium, which is one reason one research team tested a sodium-enriched version. For more on what each mineral does, see our electrolyte guide.
Coconut water vs sports drinks
The comparison below uses USDA values for 1 cup (8 fluid ounces) of each drink. The sports drink entries date from the 2018 USDA database, and formulas change, so check current labels.
| Drink (USDA entry) | Calories | Carbohydrate | Sugars | Sodium | Potassium |
|---|---|---|---|---|---|
| Fresh coconut water (170174) | 46 | 8.9 g | 6.3 g | 252 milligrams | 600 milligrams |
| Packaged coconut water, unsweetened (174831) | 44 | 10.4 g | 9.6 g | 64 milligrams | 404 milligrams |
| Gatorade G, ready-to-drink (173660) | 63 | 15.7 g | 12.8 g | 95 milligrams | 37 milligrams |
| Powerade lemon-lime (175108) | 78 | 19.1 g | 14.9 g | 102 milligrams | 44 milligrams |
In the coconut water vs sports drinks matchup, coconut water has fewer calories and less sugar, and about ten times the potassium. Sports drinks are formulated with more carbohydrate for fuel and, in the packaged comparison, more sodium. Neither is needed for most short, easy workouts, and for long or very hot sessions a sports dietitian or clinician can help you plan fluids.
Is coconut water good for you? Potassium cautions
For most healthy people, yes, coconut water is a low-calorie drink that adds potassium, a nutrient many diets fall short on. The National Academies set Adequate Intakes of 3,400 milligrams a day for men and 2,600 for women; the label Daily Value is 4,700. Our potassium guide explains those numbers.
The exception matters. According to the NIH Office of Dietary Supplements, in people whose kidneys do not clear potassium well because of chronic kidney disease, or who take medicines such as ACE inhibitors or potassium-sparing diuretics, even dietary potassium below the Adequate Intake can cause high blood potassium (hyperkalemia). MedlinePlus adds ARBs and spironolactone to the list. Hyperkalemia can disturb heart rhythm.
- A 2014 case report titled “Death by coconut” (Circulation: Arrhythmia and Electrophysiology) described hyperkalemia with a slowed heart rhythm linked to drinking coconut water during physical exertion.
- A later case report described a 78-year-old man who drank several servings of king coconut water almost daily for a week, among other factors, and arrived with a dangerously high potassium level and heart rhythm changes; he recovered after emergency care.
If you have kidney disease, heart failure or take a medicine that raises potassium, ask your clinician before drinking coconut water regularly, and seek urgent care for muscle weakness, palpitations or an irregular heartbeat.
Labels, sugar and allergies
- Unsweetened vs sweetened: check the ingredient list for added sugar or juice blends; flavored versions can approach soft drink territory.
- Pasteurization: some fresh or raw bottled coconut water is not pasteurized. FDA advises children, older adults, pregnant women and people with weakened immune systems to choose pasteurized juice or juice processed to kill germs, a useful rule of thumb here too.
- Allergy: since January 2025 FDA no longer lists coconut as a tree nut for allergen labeling, but coconut must still be named in the ingredient list. Follow your allergist’s advice.
- Sugar-free sports drinks: some use sugar alcohols or sweeteners; see our sugar alcohols guide.
Coconut water is sometimes blended into juice shots as well; our sibling guide to ginger shots covers that trend. Claims that coconut water cleanses, detoxifies or boosts metabolism are not supported by trials.
Frequently Asked Questions
What are the main coconut water benefits?
It is a low-calorie drink with potassium, some magnesium and sodium. Small trials found it rehydrates about as well as a sports drink after exercise.
How much potassium is in coconut water?
About 600 milligrams per cup of fresh coconut water and about 404 per cup of a packaged unsweetened version in USDA data. Brands vary, so read the label.
Is coconut water better than a sports drink?
Not in the trials so far. Rehydration and performance were similar, and coconut water caused more bloating for some people. It has less sugar and sodium.
Is coconut water good for you every day?
For most healthy people it can fit a balanced diet. People with kidney disease or on potassium-raising medicines should ask their clinician first.
Does coconut water have sugar?
Yes, naturally. A cup of fresh coconut water has about 6 grams of sugars in USDA data, and sweetened versions add more.
Is coconut water the same as coconut milk?
No. Coconut water is the clear liquid inside the coconut; coconut milk is made from the grated flesh and contains much more fat.
Questions about a label? Contact us or read our Buyer’s Guide. Food comes first; follow the label and ask a healthcare provider before starting a supplement, especially if you take medicines, are pregnant or have a medical condition. 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.
Last reviewed October 2026.
Related guides: Electrolytes: What They Do, Who Needs Them and How to Read Labels, Potassium Supplement Guide: The 99 Milligram Limit, Side Effects and Low Potassium Symptoms, Foods High in Potassium: USDA Table, Daily Value and Who Should Be Careful, Coconut: Meat Nutrition, Fat Facts and Is It Healthy?.