plátano

What is plátano?

Plátano is the banana and plantain plant, Musa x paradisiaca. In Latin America it is food first and home remedy second. People use the fruit, and sometimes the peel and the leaf.

Two main types are sold. Plátano macho (plantain) is starchy and is cooked green or ripe. Guineo or plátano fruta (sweet banana) is eaten raw.

For home remedies, the green, unripe fruit matters most. It is boiled or dried and ground into green banana flour. Ripe fruit is used more as gentle food for an upset stomach.

Evidence verdict: as a food, plátano clearly supplies potassium and fibre. Small trials in children support cooked green banana for lasting diarrhoea. Most other folk uses have not been tested in people.

Long traditional use is not proof that a remedy works. It is also not proof that it is safe.

How does plátano work?

Most of what plátano does comes from plain nutrition, not a drug-like action.

Green fruit is high in resistant starch and pectin. In small human studies, these feed gut bacteria and help firm up loose stools. Pectin also holds water in the gut.

Bananas are a good source of potassium. Diets higher in potassium lower blood pressure in trials. So banana can help as part of such a diet.

Banana on its own has not been shown to control high blood pressure (hypertension). Treat it as food, not as a replacement for medicine.

Ripe fruit is sweeter and holds less resistant starch. Its fibre may help stools pass more easily. Trial evidence for constipation is thin.

Peel extracts slow germs and mop up free radicals in laboratory tests. Whether that does anything on human skin is not established.

Banana contains small amounts of tryptophan, dopamine and serotonin. Folk claims about sleep and mood rest on this. Eating banana has not been shown to raise brain serotonin in people.

What forms does plátano come in?

Plátano is sold as ordinary food, and in a few processed forms.

- Fresh ripe banana, eaten raw. - Fresh green plantain, boiled, baked or fried (tostones, mofongo). - Boiled green banana, the form used in diarrhoea research.

- Green banana flour, sold as a food or as a fibre supplement. - Resistant starch powders made from green banana. - Dried banana chips, often fried and sweetened.

- Banana leaf, used to wrap food such as tamales and hallacas. - Peel rubbed on skin, a home practice with no trial support.

Quality varies. Flour and powder are food products, so they are not tested like medicines. Check the label for added sugar and for other starches.

Where it comes from:

Bananas and plantains came to the Americas in the 1500s, carried by Spanish and Portuguese ships from Africa and Asia. They spread fast through the Caribbean and tropical Latin America.

They became a staple crop and a kitchen remedy. Healers and grandmothers gave boiled green plátano for loose stools and for a weak stomach. Ripe banana was given to children recovering from illness.

Other past uses were recorded across the region. Peel was rubbed on warts, bites and small burns. Leaves were warmed and used as wraps or dressings.

These uses were handed down by habit and by family teaching, not by testing. This page describes them; it does not recommend them.

What does plátano help with?

• Lasting diarrhoea in children (cooked green banana): This is the best-supported use. Small trials in Bangladesh added boiled green banana to the diets of young children with ongoing diarrhoea. The children got better faster than those on a plain rice diet. The green banana was part of a whole feeding plan, with fluids and care. It was not a cure on its own. A child with diarrhoea still needs fluids and a doctor's eye.
• Mild constipation: Tradition used ripe banana to soften and move the stool. Ripe fruit gives fibre, water and sugars that draw water into the gut. Direct trial evidence in adults with constipation is thin. Some people find green or underripe fruit makes them more blocked, not less.
• Upset stomach and bland-diet recovery: Ripe banana is a standard bland food after vomiting or a stomach bug. It is soft, low in fat and easy to keep down. That is sensible feeding rather than a proven treatment. No good trials show banana speeds healing of the stomach lining in people.
• Potassium intake as part of a blood pressure diet: Potassium-rich diets lower blood pressure in human trials. Banana is an easy way to add potassium to meals. No trial shows that banana alone lowers blood pressure. Do not swap a prescribed blood pressure drug for fruit.
• Muscle cramps linked to low potassium: A long-standing home belief is that banana stops cramps. Potassium does matter for muscle and nerve work. Studies in athletes have not shown that banana reliably prevents cramps. Most exercise cramps are not caused by low potassium.
• Fuel for sport and long walks: Banana is a simple carbohydrate snack. Small sports studies suggest it fuels endurance work about as well as a sugar drink. This is a food effect, not a remedy effect. People with a sensitive gut may get gas from the fruit sugars.
• Skin complaints treated with peel (folk use): Peel was rubbed on warts, bites, burns and spots in many Latin American households. Lab tests show peel extracts can slow some germs and act as antioxidants. There is no good human trial for this. Peel is not sterile, so keep it off burns, wounds and broken skin.

Which foods are rich in plátano?

1. Fresh ripe banana (guineo)
2. Boiled or baked green plantain
3. Tostones and patacones (fried green plantain)
4. Maduros (fried sweet plantain)
5. Mofongo and mangú (mashed plantain dishes)
6. Green banana flour in breads, batters and porridge
7. Banana chips
8. Tamales and hallacas wrapped in banana leaf

Practical Tips:

Plátano is a staple food, so the kitchen is the main source.

How you cook it changes what you get. Boiled green plantain keeps more resistant starch. Frying adds fat and calories and does not add benefit.

Banana leaf is used as a wrapper for flavour and steam. It is not eaten.

What are the side effects of plátano?

• Gas, bloating or stomach gurgling, mainly from green fruit and flour
• Harder stools in some people who eat a lot of unripe fruit
• A rise in blood sugar after large servings of ripe fruit
• Itchy mouth, lips or throat in people allergic to banana
• Rash or swelling in latex-fruit allergy
• High potassium in people with poor kidney function
• Headache or migraine reported by some sensitive people
• Tooth decay from sticky dried banana chips

Good to know:

For most people plátano is a safe everyday food. Side effects are mild and usually come from eating a lot at once.

Two problems are more serious but uncommon. One is true banana allergy, which can be severe. The other is high potassium in people with kidney failure.

If your lips, tongue or throat swell, call emergency services at once.

How much plátano should you take?

• Recommended daily: Plátano is a food, so whole fruit carries no label dose. One medium banana gives roughly 400 mg potassium and about 3 g fibre. Green banana flour packs often suggest about one to two tablespoons a day, stirred into food or drink. That is the label amount, not advice for you. If you have kidney disease, are on dialysis, or take a potassium-sparing water pill (diuretic), ask your doctor how much potassium you may have.
• Best time of day: Time of day does not matter much. Eat it when it suits your meals. Some people use banana before sport for quick fuel. Others find fruit late at night brings heartburn.
• With or without food: Plátano is food, so it is normally eaten as part of a meal or as a snack. Green banana flour is usually mixed into porridge, soup, batter or a drink. Starting with a small amount and drinking water lowers the chance of gas and bloating.
• Time to effect: For hunger and energy, the effect is quick, within an hour. For stools, fibre effects usually show over two to four days of steady use. In the children's diarrhoea trials, gains showed within several days. It may also do nothing for your complaint. Many folk uses of plátano have never been shown to work in people.
• How long to take it: As food, plátano can be eaten for life. There is no set course length. In the diarrhoea trials, cooked green banana was fed for a few days to about a week. That was done under medical care. Do not keep treating diarrhoea at home for more than two days without advice. In babies and small children, get help sooner.