Educational information, not medical advice — ask your doctor or midwife.
Palo de Brasil is the red heartwood of a small spiny tree, Haematoxylum brasiletto. It grows in Mexico and Central America. Folk healers simmer the wood chips into a deep red tea.
It is sold as sticks, chips or shavings. The tea is drunk for the blood, the kidneys, the heart and sugar levels. The same wood is an old red dye, called brazilwood in English.
The honest verdict: the research is almost all lab and animal work. There are no good human trials.
Long use in tradition is not proof that it works. It is not proof that it is safe either.
No one has shown what palo de Brasil does inside the human body. The proposed actions come from test tubes and animals.
The wood is rich in brazilin, a red pigment. In lab tests, brazilin mops up free radicals (unstable molecules that damage cells). Whether that happens in someone drinking the tea is not known.
In test tubes, extracts slow the growth of some bacteria and fungi. In cell studies they can also harm cancer cells. These are early signals, not effects shown in people.
Some animal studies report lower blood sugar after the extract was given. That work is small and has not been repeated in humans.
The wood also holds tannins, which bind protein in the gut. That may explain the dry taste and any effect on loose stools.
Most often you will see raw wood: chips, shavings or short sticks. Markets in Mexico sell it loose, by weight.
Other forms turn up too. Some shops offer ground powder or capsules. Liquid extracts and tinctures (alcohol-based drops) are sold online.
The same wood is sold for dyeing cloth and for crafts. Those grades are not meant for drinking.
Quality is a real problem. Labels often skip the species name, and other red woods are sold under the same name.
Healers in Mexico and Central America used palo de Brasil for centuries. The red tea was given for what was called thin or weak blood, and for heart and kidney complaints.
It also carried a reputation for sugar problems and for women's monthly pain. The deep colour mattered: red remedies were linked to blood in folk thinking.
From the 1500s the wood was shipped to Europe as a dye. That trade made the tree well known long before anyone studied it as a medicine. None of this history tells you it is safe to use on your own.
Stop taking it and see a doctor if you notice any of these:
- yellow skin or eyes, dark urine, or pain under your right ribs - a rash, itching, swelling of the lips or face, or trouble breathing - shakiness, sweating or confusion, which can mean low blood sugar - vomiting, bad belly pain, or diarrhoea that lasts more than two days - any new or heavier bleeding, including blood in urine or stool
Red tea can tint urine pink. If you are not sure whether it is dye or blood, stop the tea and get it checked.
Go to an emergency department for breathing trouble, face swelling, or collapse.
In Mexico it is sold openly in markets and herbal shops as a traditional remedy. In the United States, the UK and the EU it is not approved as a medicine, and no health claims may be made for it. Wood sold for dyeing or crafts is not checked for food or drink use.
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.
One email with the summary. We'll also send a short weekly evidence update — unsubscribe any time.
