Dubbed by marketers as "Mother Nature's sports drink," the demand for coconut water is soaring. The nutritional components of coconut water promise hydration and the potential to alleviate various health conditions, from vomiting to cancer and kidney stones. But is drinking coconut water truly beneficial?
1. What does coconut water contain?
Coconut water has a naturally sweet, refreshing taste. It contains easily digestible carbohydrates in the form of sugars and electrolytes. Unlike coconut milk or coconut oil, which are high in fat, coconut water is a clear liquid found inside young, green coconuts.
Low in calories, naturally fat-free and cholesterol-free, higher in potassium than four bananas, and highly hydrating—these are just a few of the many recorded benefits of coconut water.
Coconut water has fewer calories, less sodium, and more potassium than many sports drinks. Most unsweetened coconut water contains approximately 5.45 calories, 1.3 grams of sugar, 61 milligrams of potassium, and 5.45 milligrams of sodium per 30 ml. By comparison, Gatorade contains 6.25 calories, 1.75 grams of sugar, 3.75 milligrams of potassium, and 13.75 milligrams of sodium per 30 ml.
Coconut water has significantly less sugar than many sports drinks and also less sugar than soda and some fruit juices. Pure coconut water can be a better choice for adults and children looking for a less sugary beverage. However, coconut water should not be consumed excessively, warns Lilian Cheung, DSc, from Harvard School of Public Health. She states: "An 11-ounce container contains about 60 calories, and if you drink multiple cups a day, the calorie intake can add up quickly."
Cheung, a registered dietitian and co-author of Savour: Mindful Eating, Mindful Life, advises consumers to carefully consider beverage choices and read labels to choose pure, unsweetened coconut water while avoiding those with added sugar or fruit juice, as they are no different from other sugary drinks.
2. Nutritional composition of coconut water
The nutritional information below is provided by the USDA, based on one cup (approximately 240 grams) of 100% coconut water:
- Calories: 44
- Fat: 0g
- Sodium: 64mg
- Carbohydrates: 10.4g
- Fiber: 0g
- Sugar: 9.6g
- Protein: 0.5g
One cup of fresh coconut water provides about 10 grams of carbohydrates, with 9 grams of natural sugar. Some commercial brands of coconut water are sweetened with added sugar, so it's essential to carefully check labels before choosing packaged coconut water.
Coconut water generally contains little to no fat (less than 1 gram), but some canned coconut water brands may contain a small amount of fat.
Coconut water also provides a small amount of protein, although the exact amount varies by brand.
It is an excellent source of vitamin C, containing 24 mg per serving, which constitutes about 32% of the Recommended Daily Allowance (RDA) for women and 27% for men.
Coconut water is also rich in potassium (404 mg per cup), accounting for 16% of the adequate intake (AI) for women and 12% for men. Additionally, it provides manganese (0.5 mg per cup), contributing to 28% of the AI for women and 22% for men. Coconut water also contains small amounts of magnesium, calcium, iron, phosphorus, zinc, and copper.
3. Is drinking coconut water good for you?
For many years, substantial evidence supporting the benefits of this natural drink has been widely accepted, particularly in tropical regions. However, recent social media claims have gone viral, asserting that drinking hot coconut water can cure cancer. Subsequently, the American Institute for Cancer Research released an official list of registered "Cancer-Fighting Foods", which does not include coconut water. Additionally, in a 2011 lawsuit, a coconut water manufacturer was required to stop making exaggerated health claims about its product.
While animal studies suggest that coconut water may improve blood sugar levels, prevent kidney stones, and reduce cholesterol, further research is needed to confirm these benefits in humans. However, a small human study has shown that increasing coconut water intake can help lower blood pressure.
Some people prefer coconut water as a sports drink. It provides electrolytes (sodium, potassium, calcium, and magnesium) and carbohydrates to aid muscle function, with fewer calories than traditional sports drinks and gluten-free.
Evidence-based benefits of coconut water:
- Antioxidant properties: Free radicals are unstable molecules produced in cells during metabolism. Their production increases in response to stress or injury. Excessive free radicals can lead to oxidative stress, potentially damaging normal cells and increasing the risk of diseases. Animal studies exposed to toxins have shown that coconut water contains antioxidants that neutralize free radicals, preventing cellular damage. One study found that rats with liver damage experienced significant improvements in oxidative stress after being treated with coconut water compared to untreated rats. However, no human studies have yet investigated this antioxidant activity. In summary, coconut water contains antioxidants that help protect the body's cells from damage caused by free radicals.
- Diabetes management: Studies suggest that coconut water may lower blood sugar levels and improve other health markers in diabetic animals. In one study, diabetic rats treated with coconut water maintained better blood sugar levels than the control group. The same study also found that rats given coconut water had lower hemoglobin A1c levels, indicating improved long-term blood sugar control. Another study showed that providing coconut water to diabetic rats improved blood sugar levels and reduced oxidative stress markers. However, more controlled human studies are needed to confirm these effects. With 3 grams of fiber and only 6 grams of digestible carbohydrates per cup (240 ml), coconut water can be easily included in a diabetic-friendly diet. It is also a good source of magnesium, which may enhance insulin sensitivity and lower blood sugar levels in people with type 2 diabetes and prediabetes. In summary, animal studies suggest that coconut water may improve blood sugar control. It is also a good source of magnesium, which can enhance insulin sensitivity and reduce blood sugar levels.
- Kidney stone prevention: Drinking enough fluids is essential to prevent kidney stones. While plain water is an excellent choice, a study suggests that coconut water may be even more beneficial. Kidney stones form when calcium, oxalate, and other compounds combine to form crystals that accumulate in the urine. Some people are more prone to kidney stones than others. In a study on rats with kidney stones, coconut water prevented crystals from adhering to the kidneys and other areas of the urinary tract. It also reduced the number of crystals forming in the urine. Researchers believe that coconut water helps lower free radical production in response to high oxalate levels in urine. This is the first study to examine the effects of coconut water on kidney stones, so further research is necessary. In summary, preliminary animal studies suggest that coconut water may help prevent kidney stones by reducing crystal formation and accumulation.
- Heart health benefits: Drinking coconut water may help reduce the risk of heart disease. In one study, rats given coconut water experienced lower blood cholesterol and triglyceride levels, along with a significant reduction in liver fat. Another study fed rats a similar diet supplemented with coconut water at a dose of 4 ml per 100 grams of body weight. After 45 days, the coconut water group had cholesterol and triglyceride levels reduced to the same extent as a statin drug used to lower cholesterol. However, this was a very high dose. In human terms, this would be equivalent to a 150-pound (68 kg) person consuming 91 ounces (2.7 liters) of coconut water per day. While the fact that coconut water reduced cholesterol as effectively as a statin is impressive, more research is needed. In summary, animal studies indicate that coconut water may have powerful cholesterol-lowering properties.
- Blood pressure reduction: Coconut water may be highly beneficial for controlling blood pressure. A small study in people with high blood pressure found that coconut water lowered systolic blood pressure (the higher number in a blood pressure reading) in 71% of participants. Coconut water contains approximately 600 mg of potassium per 8-ounce (240 ml) serving. Potassium has been shown to lower blood pressure in individuals with high or normal blood pressure. Additionally, an animal study found that coconut water has anti-thrombotic activity, meaning it may help prevent blood clot formation. Overall, coconut water may help lower blood pressure and potentially reduce the risk of blood clot formation in the body.
Reference sources: webmd.com, healthline.com
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