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Coconut water, Cocos nucifera. Botanical plate: Cocos nucifera - Köhler–s Medizinal-Pflanzen-187
Plate: Cocos nucifera - Köhler–s Medizinal-Pflanzen-187. Franz Eugen Köhler, Köhler's Medizinal-Pflanzen. Public domain.

Coconut water

Cocos nucifera

Fruits. Caribbean and Modern nutrition.

Also called Young coconut water, Agua de coco

Pinyin: Yē Zi Shuǐ

Spanish: Agua de coco

High potassium with kidney disease

Coconut water is the clear liquid inside young green coconuts, drunk fresh or bottled as a light drink with potassium and some electrolytes.

Did you know? A cup of coconut water can have more potassium than a medium banana.

What it may help, and how strong the proof is

  • Energy & tiredness. A few small trials found coconut water rehydrates about as well as sports drinks after exercise. It is not clearly better than plain water for most people.
    Early proof
  • Blood pressure. Potassium helps lower blood pressure in the diet. Coconut water trials are few and small, so its own effect is unproven.
    Traditional proof

Parts of the body

Energy & metabolism, Heart & vessels

Traditional use

In tropical Asia, the Pacific and the Caribbean, people have drunk young coconut water for centuries as a refreshing drink and as a folk rehydration remedy.

How it is classified

Herbal actions
Nutritive, Diuretic. Energy: neutral.

How people take it

Drink it fresh from a young coconut or from cartons. It is often used after exercise or in hot weather. No standard dose is set.

Juice and food.

Where to get it

Comes from young green coconuts of the coconut palm, grown along tropical coasts in Southeast Asia, the Pacific, India, Brazil, the Caribbean and West Africa. Sold fresh, in cartons and cans, and as powder. Key nutrients: potassium and small amounts of magnesium.

Be careful

Most people tolerate it well. Sweetened or flavored bottled drinks can be high in sugar. People with kidney disease, or on medicines that raise potassium, should ask a doctor before drinking a lot.

Avoid if: kidney disease.

Mixing with other things

  • Works well together

    Both are tropical fruit drinks often blended together.

  • Use caution
    Blood pressure medicine (lisinopril, amlodipine, losartan)

    ACE inhibitors and ARB blood pressure medicines can raise potassium. Large amounts of coconut water can add to that.

  • Use caution
    Water pills (furosemide, hydrochlorothiazide)

    Potassium-sparing diuretics can raise potassium. Coconut water adds potassium, so check with a doctor.

Adds up with others that may lower blood pressure: , , , , , , , , , , , , , and 12 more.

The honest take

Coconut water is a light, low-calorie drink with potassium, and it can rehydrate after exercise about as well as sports drinks. It is not a cure-all, and plain water works for most people. Bottled brands can be high in sugar.