Educational information, not medical advice — ask your doctor or midwife.
Mango leaf is the leaf of the mango tree, Mangifera indica. In the Caribbean, fresh or dried leaves are boiled into a tea. Haitian Creole calls it fèy mango.
In Jamaica and Trinidad it is simply called mango leaf tea. People drink it for blood sugar, upset stomach, coughs and sore throats. Cooled tea is also used as a mouth rinse and a skin wash.
Here is the honest verdict up front. Evidence in people is thin. Most studies test a purified extract, not a home-brewed cup.
Long use in tradition shows that Caribbean households valued this leaf. It is not proof that the leaf works. It is also not proof that it is safe.
The mango tree is not native to the islands. It came from South Asia and spread through the Caribbean in the 1700s. The leaf habit travelled with it, and overlaps with uses in India and West Africa.
Almost everything said about how mango leaf works comes from lab dishes and animals, not from people.
The leaf is rich in mangiferin. In test tubes, mangiferin slows enzymes that break starch down into sugar. If that blunts the sugar rise after a real meal, it has not been settled.
In rats and mice, leaf extracts have lowered blood sugar and blood fats. Animal results often fail to carry over to humans.
In lab tests, mangiferin mops up free radicals. It also damps some markers of swelling (inflammation) in cell studies. Whether a cup of tea does any of this inside your body is unknown.
Tannins in the leaf bind protein and dry the tissue they touch. That is a real chemical effect, and it is the likely reason the tea was used for loose stool and sore gums. The size of the benefit in people has not been measured well.
Dried loose leaf and tea bags are the forms most people meet.
You may also see:
- Fresh leaves, boiled at home in Caribbean kitchens - Leaf powder in jars or sachets - Capsules and tablets of leaf extract, some standardised for mangiferin - Liquid tinctures in alcohol - Strong cooled tea used as a mouth rinse or skin wash
Extract capsules can be far stronger than a cup of tea. They are a different product, even though the label says the same plant.
Most tea labels do not state how much mangiferin is inside. If you want a known amount, only a standardised extract can give you one.
Caribbean home medicine has used mango leaf for well over a century. Healers in Haiti boiled fèy mango for fever, coughs and stomach trouble.
In Jamaica and Trinidad, mango leaf tea was drunk for "sugar", the local word for diabetes. It was also taken for diarrhoea and used as a gargle for sore throats.
The same leaf was used in India, Nigeria and Cuba. Cuban researchers later built a branded extract from mango bark and leaf.
This page records what people did. It is not advice to treat an illness on your own.
Stop and get emergency help if you get swelling of the lips, face or throat, a spreading rash, or trouble breathing. That is a serious allergic reaction.
Treat low blood sugar at once. Signs are shaking, sweating, hunger, a fast heartbeat (tachycardia) or confusion. Take fast sugar, then call your doctor.
See a doctor within a day or two if:
- Diarrhoea lasts more than two days, or you see blood - You feel faint or very dizzy - Your skin or eyes turn yellow - Your home blood sugar readings swing up or down
In the United States, mango leaf is sold as a herbal tea and a dietary supplement. It is not approved as a medicine for any condition. In the United Kingdom and the European Union it is sold as a food or herbal tea, and no health claims are authorised for it.
Evidence grades and traditional-use labels are explained in our methodology. Nothing here is medical advice.
What it is typically used for, usual dose, cautions, and the study behind it where real trial data exists.
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