Educational information, not medical advice — ask your doctor or midwife.
Pápalo is a leafy green herb eaten raw in Mexico and parts of South America. The leaves are round, soft and grey-green, with a strong, pungent smell. It is also called Bolivian coriander, though it is not related to coriander.
First and foremost it is a food, not a medicine. Cooks tear fresh leaves over tacos, cemitas, beans, soups and salsas. Heat destroys the flavour, so it goes in raw at the end.
Folk use in Mexico and the Andes also treated it as a digestive herb and a mild remedy for the heart and blood. Human studies are almost absent. Long traditional use is not proof that a plant works, and not proof that it is safe.
No one has shown how pápalo acts in the human body. What exists is laboratory work on its oils and extracts.
In test tubes, extracts of Porophyllum ruderale slow the growth of some bacteria and fungi. Lab studies also report activity against the parasite that causes leishmaniasis. Whether any of this happens in a person who eats the herb is not known.
In cell studies, the plant's oil and flavonoids appear to mop up free radicals. That is a common finding for strong-smelling green herbs. It does not tell you that eating pápalo changes any disease.
The traditional idea that it calms gas and bloating has a simple possible basis. Aromatic oils can relax the gut wall in animal tests. Pápalo itself has not been tested this way in people.
Pápalo is sold mainly as a fresh herb. You will usually meet it in these forms:
- bunches of fresh stems at Mexican and Latin American markets - a sprig left on the table beside tacos or cemitas, to tear over food - seeds and seedlings for home growing - dried leaf, which loses most of the smell and is little used
Capsules, tinctures and standard extracts are rare and not well controlled. The essential oil appears mostly in laboratory work, not on shop shelves. If you do see a concentrated product, there is no agreed strength to compare it against.
Pápalo has a long record as a wild-gathered green in Mexico and the Andes. Its Nahuatl-based name joins the words for butterfly and leafy green. Spanish colonial and later writers noted it on market stalls and in everyday cooking.
Country healers used it for more than flavour. Recorded folk uses included easing a heavy stomach, calming gas, lowering high blood pressure (raised pressure in the arteries), and washing insect bites and sore skin. Some communities used leaf poultices on wounds and swellings.
In Bolivia and Peru, related Porophyllum plants served similar roles, which is where the name Bolivian coriander came from. These uses were passed down by habit and word of mouth. They were never tested in the way a medicine is tested.
Stop eating it and get urgent help if your lips, tongue or throat swell, or you wheeze or struggle to breathe. That points to an allergic reaction.
See a doctor if you get a rash, hives or itching after eating or handling the leaves.
See a doctor if stomach pain, vomiting or diarrhoea follow and do not settle within a day or two.
Book an appointment, rather than relying on a herb, if you are treating high blood pressure, a wound that looks infected, or ongoing gut symptoms.
In Mexico, the United States, Canada and the EU, pápalo is an ordinary food herb and is sold as fresh produce. No medicine regulator has approved it 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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