Educational information, not medical advice — ask your doctor or midwife.
Pericón is a leafy herb from Mexico and Central America. Its botanical name is Tagetes lucida. Many people know it as Mexican tarragon or by the old Nahuatl name yauhtli.
The dried leaves and small yellow flowers are brewed as a tea. Cooks also use it like French tarragon, because it has a sweet anise taste. Healers have long given it for stomach cramps, nerves, chills and coughs.
Here is the honest verdict. Human evidence is very thin, and no health claim for pericón is proven. Long traditional use is not proof that it works, and it is not proof that it is safe.
The plant belongs to the marigold family. It is a close relative of the garden marigolds many people grow. Its scent is strong and sweet when the leaves are crushed.
No one has shown how pericón works in the human body.
In animal tests, extracts have calmed movement and reduced signs of fear. Researchers think coumarin-like compounds may act on GABA signalling, the brain's main calming system. That idea has not been tested in people.
In test tubes, the oil and extracts slow the growth of some bacteria and fungi. Whether this happens on skin or inside the gut is not known.
Animal work also hints at mild pain easing and a relaxing effect on gut muscle. These are early findings from labs, not results from patients.
So the fair summary is simple. The plant does contain active compounds. What they do in a person who drinks the tea remains unproven.
Pericón is sold mostly as a dried culinary and tea herb.
Loose dried leaf and flower is the usual form in Mexican markets. Tea bags and blended "Mexican tarragon" teas are also common.
Fresh sprigs are sold for cooking, where they stand in for tarragon. Bunches are tied into crosses and wreaths for Day of the Dead and for the feast of San Miguel.
You may also see tinctures, which are alcohol extracts, and an essential oil. The oil is a perfume and flavour material. It is far too strong to swallow at home.
Pericón has deep roots in central Mexico. Aztec records, including the Florentine Codex, describe yauhtli as a sacred plant. It was burned as incense and tied to Tlaloc, the rain god.
Healers of that era were said to use it for fright, chills and stomach trouble. Powdered yauhtli also appears in accounts of ritual use.
After the conquest the herb stayed in everyday home use. People drank it for colic, diarrhoea, nerves and coughs. It kept its ritual role as well.
Today bundles still hang over doorways on 28 September in many Mexican towns. The custom is cultural and protective in intent. None of this history shows that the tea treats any illness.
Stop pericón and see a doctor if any of these happen.
Yellow skin or eyes, dark urine, or pain under your right ribs. These can be signs of liver trouble.
Unusual bruising, nosebleeds, or bleeding gums, especially if you take a blood thinner.
A spreading rash, swelling of the lips or face, or trouble breathing. Call emergency services for breathing trouble or face swelling.
Diarrhoea that lasts more than two days, or any fever with it.
In Mexico and the United States, pericón is sold as an ordinary food herb and tea. It is not approved as a medicine anywhere, and no health claim is allowed on the label. In the European Union, estragole is limited in flavourings, so products made from the essential oil face extra rules.
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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