Educational information, not medical advice — ask your doctor or midwife.
Cancerina is the root bark of Hippocratea excelsa, a woody vine from Mexico and Central America. In Mexican markets it is sold as chopped or powdered bark. It is brewed into a tea or used as a wash for the skin.
Folk healers used it mainly for stomach complaints and for sores that were slow to heal. The name comes from old Spanish use for a bad sore. It does not come from modern cancer care, and the plant is not a cancer treatment.
Here is the honest verdict. Human evidence is almost absent, and nearly all research sits in test tubes and animals. Long use in a tradition is not proof that something works, and it is not proof that it is safe.
Nobody has shown in people how cancerina works. What follows is laboratory work only.
The root bark holds quinone methide triterpenes, a group of strong plant compounds. In test tubes these slow some bacteria and kill some tumour cell lines. Whether that happens in a living person is unknown.
In rats, root extracts reduced stomach damage caused by alcohol and by irritant drugs. Animal results often fail to repeat in people. Treat this as a lead, not a finding.
Lab tests also show the extract can block an enzyme that breaks down starch. Some writers use this to argue a blood sugar effect. No human trial supports that claim.
Cancerina is most often sold as loose dried root bark, whole or chopped. Powder and capsules also appear online.
Other forms include tinctures in alcohol, and ready-made teas. Some Mexican products blend it with other herbs for stomach or skin use.
One real problem is identity. Several unrelated plants are sold under the name cancerina in Latin America. Unless the label names Hippocratea excelsa, you cannot know what is in the bag.
Cancerina has a long record in Mexican folk medicine, well into the colonial period and likely before it. Healers in central and southern Mexico used the root bark most often.
Traditional uses recorded by market surveys and ethnobotanists include stomach pain, gastritis, diarrhoea, and washes for wounds and ulcers of the skin. Some healers also used it for mouth sores and for complaints of the kidneys.
It remains a common market herb in Mexico today. That standing reflects habit and reputation, not testing.
Stop and see a doctor if stomach pain gets worse, or if it lasts more than a few days.
Get urgent care for black or tarry stools, vomit that looks like coffee grounds, or vomiting blood. These can mean bleeding in the gut.
Also see a doctor promptly for yellow skin or eyes, dark urine, a spreading rash, or a wound that is red, hot and swelling. Tell them exactly what you took.
In Mexico, cancerina is sold freely as a market herb and herbal product. In the United States it may be sold as a dietary supplement, but it is not approved as a medicine.
In the UK and the EU it holds no licence as a herbal medicine. No regulator has reviewed its safety.
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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