Educational information, not medical advice — ask your doctor or midwife.
Strawberry tree (Arbutus unedo) is a small evergreen tree from the Mediterranean. Italians call it corbezzolo. It carries round red fruit that looks a little like a strawberry.
The ripe fruit is eaten fresh and made into jam, syrup and spirits. Sardinian bees make a dark, bitter corbezzolo honey from its flowers. These are foods, and people have eaten them for centuries.
The folk remedy is different. Healers used the leaves and bark, which are bitter and packed with tannins. They were brewed as a tea for urinary trouble and loose bowels.
Here is the honest verdict. There are almost no human trials on leaf or bark preparations. Long traditional use is not proof that something works, and it is not proof that it is safe.
No one has shown in people how strawberry tree leaf affects a disease. What follows comes from laboratory and animal work.
The leaves contain arbutin. In the body, arbutin can be converted into hydroquinone, which is passed out in urine. This is the same chemistry used to explain bearberry (uva-ursi) as a urinary remedy, and it is also the reason for the safety limits on it.
In test tubes, leaf extracts slow the growth of some bacteria and mop up free radicals. Whether that happens in a human bladder is not established.
Tannins are astringent. They bind proteins and tighten tissue on contact, which is the usual reason strong leaf teas were used for diarrhoea or as a gargle. This is a local effect in the gut or mouth, not a proven treatment.
In animal studies, extracts have lowered blood sugar, raised urine output and protected the stomach lining. These results have not been repeated in people, so treat them as leads, not findings.
The fruit works differently and more simply. It is a food that supplies vitamin C, fibre and colourful plant pigments.
Most people meet this plant as food, not as a remedy.
- Fresh fruit, eaten ripe in autumn. The flavour is mild and slightly grainy.
- Jam, syrup and jelly, sold across Italy, Spain and Portugal.
- Corbezzolo honey, a dark and bitter honey from Sardinia. It is prized and costly.
- Medronho, a strong Portuguese fruit spirit. This is high-proof alcohol, not a health product.
- Dried leaf, sold loose for tea in some southern European herb shops.
- Leaf or bark extracts in capsules or tinctures. These are uncommon and rarely standardised.
- Cosmetic extracts, added to skin creams for their antioxidant marketing claim.
The food forms and the leaf forms are not interchangeable. Eating the jam tells you nothing about the safety of a leaf tea. The arbutin and tannin concerns apply to the leaf and bark only.
Country people around the Mediterranean used strawberry tree for centuries. The fruit fed households and livestock in autumn, and the wood was burned for charcoal.
In Italian, Spanish, Portuguese and North African folk practice, leaf and bark teas were taken for urinary complaints, diarrhoea and as a spring tonic. Bark washes were applied to grazes and sores. Herbalists grouped the plant with bearberry, because both contain arbutin.
The Latin name carries a joke. Pliny wrote unedo, meaning "I eat only one", a nod to the fruit's dull taste.
The tree also became a civic symbol. It appears on the coat of arms of Madrid and in Italian patriotic imagery, where its green leaves, white flowers and red fruit matched the flag.
None of this history tells you what a leaf tea does inside a person.
Stop the leaf or bark preparation and see a doctor if symptoms are not clearly better within 48 hours.
Seek care the same day if you have:
- Fever, chills, or pain in your side or lower back. These can mean a kidney infection.
- Blood in your urine, or pain when you pass urine that is getting worse.
- Vomiting that will not settle, or severe stomach pain.
- Yellow skin or yellow eyes, which can signal a liver problem.
Get emergency help for swelling of the lips, face or throat, or trouble breathing. These are signs of a severe allergic reaction.
In the European Union, the fruit, jam and honey are ordinary foods. Medronho is a regulated spirit drink in Portugal.
Leaf and bark products are sold as food supplements, not as approved medicines. No medicines regulator, including the EMA or the US FDA, has approved strawberry tree to treat any condition.
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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