Dr. Huynh Tan Vu from University Medical Center Ho Chi Minh City - Facility 3, notes that during the hot season, the demand for hydration and cooling increases. Coconut water is a popular choice among natural beverages due to its light sweetness, ease of consumption, and rich mineral content. However, doctors emphasize that coconut water should not entirely replace plain water. Excessive daily consumption can lead to mineral overload, electrolyte imbalance, or an undesirable increase in sugar intake.

Dr. Nguyen Thi Son, also from University Medical Center Ho Chi Minh City - Facility 3, concurs, stating that nutritionists advise limiting intake to two to three coconuts per week, or about 500 ml per serving. Exceeding this amount may lead to adverse effects.

Dr. Son explains that consuming a large volume of coconut water at once can cause bloating. The stomach accumulates excess fluid, leading to abdominal distension and discomfort.

Electrolyte imbalance occurs when blood potassium and sodium levels fluctuate beyond safe limits. Consistent, high intake of coconut water can disrupt these levels, slowing blood circulation to the heart, causing an unstable heart rate, and potentially leading to cardiac arrest.

Moreover, increased coconut water intake often leads to more frequent urination. This can strain the kidneys, forcing them to work harder to excrete fluids, potentially causing temporary swelling of renal parenchymal cells. Prolonged strain may impair kidney function.

Fresh coconut water is popular during the hot season. Photo: My Y

Despite its rich nutrients, coconut water should not be consumed indiscriminately, especially by individuals with specific health conditions or predispositions.

Dr. Vu advises that individuals with a "cold" constitution (co dia han) — prone to stomach chills, diarrhea, slow digestion, or sensitivity to cold — should avoid regular coconut water consumption. Large amounts of cooling beverages can exacerbate digestive issues, leading to prolonged diarrhea and impacting nutrient absorption and gut health.

Drinking coconut water in the evening is also not recommended. Its cooling properties and high mineral content can slow digestion, causing bloating and sleep difficulties, particularly if consumed with ice or coconut flesh.

Individuals with kidney failure should exercise caution with coconut water, as its high potassium and sodium content can impair kidney filtration if consumed without moderation.

While coconut water is a rich source of potassium, beneficial for individuals with high blood pressure, excessive intake can lead to potassium overload. This can lower blood pressure, causing dizziness, lightheadedness, or even fainting.

Nutritional analysis shows that 100 ml of coconut water contains about 5 g of carbohydrates. Diabetics should therefore monitor their daily coconut water intake to prevent elevated blood sugar and severe complications.

While cooling the body is essential in rising temperatures, experts recommend listening to one's body for proper coconut water consumption. Individuals with underlying health conditions or specific health concerns should consult a doctor before making coconut water a daily beverage.

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