tlanchalagua

What is tlanchalagua?

Tlanchalagua is a very bitter herbal tea, taken mostly for poor appetite and upset stomach. The plant is centaury (Centaurium erythraea), a small herb with pink star-shaped flowers. The dried flowering tops are the part used.

In Mexico and other parts of Latin America it was taken for fever, "bilis" and liver complaints. In Europe the same plant has a long life as a digestive bitter. It still flavours some vermouths and aperitifs.

Watch the name. In Mexico and the Andes, "tlanchalagua" is also used for other plants, such as Schkuhria pinnata. Check the Latin name on the label before you buy.

The honest verdict: human trials are almost absent. Long traditional use is not proof that it works, and it is not proof that it is safe.

How does tlanchalagua work?

The main idea is simple. The herb tastes intensely bitter, and bitterness may prime the gut for food.

Bitter compounds meet taste receptors on the tongue. In lab and animal work, this appears to send a nerve signal to the stomach. Saliva and stomach juices may rise, which could make food more appealing.

That chain has not been tested well in people using centaury itself. So treat it as a plausible idea, not a proven effect.

In rodent studies, centaury extracts have shown anti-inflammatory and antioxidant activity. Some animal work points to liver protection and lower blood sugar. In test tubes, extracts slow some bacteria and parasites.

None of those lab and animal findings have been confirmed in human trials. They do not tell you what a cup of tea will do.

What forms does tlanchalagua come in?

You will most often meet it as loose dried herb for tea.

- Dried flowering tops, loose or in tea bags - Alcohol tinctures and "digestive bitter" drops - Capsules or tablets of powdered herb - A named ingredient in mixed bitter blends - A flavouring in vermouth and some aperitifs

In Latin American markets it is often sold loose, by the local name. That is where mix-ups with other plants are most likely.

Where it comes from:

Centaury has one of the longer written records of any bitter herb in Europe. Greek and Roman writers named it, and medieval herbals kept it in use for fevers and "weak digestion".

Spanish colonists carried the plant and its uses to the Americas. In Mexico it took the name tlanchalagua and entered local practice. Healers gave it for fever, malaria, liver trouble and sluggish appetite.

It was also used as a so-called blood cleanser and a bitter tonic after illness. In the 20th century, German authorities listed the herb for loss of appetite and mild indigestion. That listing rested on tradition and plausibility, not on trials.

None of this history tells you it is safe to self-treat a fever or a liver problem.

What does tlanchalagua help with?

• Loss of appetite: This is the use with the most support, and the support is still weak. Bitter herbs taken before meals have a long record for waking up appetite. German authorities once listed centaury for this purpose. That listing came from tradition and expert opinion, not from controlled trials. No good human study has tested centaury alone for appetite. If a bitter helps you, you will usually know within a meal or two.
• Mild indigestion, fullness and bloating: Tradition used it for heavy, slow digestion after meals. Bitters were thought to get stomach juices moving. In animal work, related bitter compounds appear to raise stomach secretion. That has not been shown to ease bloating in people. There are no published trials of centaury for indigestion. Bitters can also make reflux worse in some people.
• General bitter digestive tonic: "Tonic" is a traditional idea, not a measurable effect. Bitters were taken in small amounts to keep digestion in order. There is no human evidence that a daily bitter improves health in a healthy person. If you enjoy it as a drink, that is a fair reason to use it. Do not expect it to fix a medical problem.
• Fever (traditional use): Latin American and European healers gave bitter teas for fever. The plant family also gave us quinine's rivals, which kept the reputation alive. There is no human evidence that centaury lowers fever. A fever can mark a serious infection. Do not treat one with tea instead of getting checked.
• Liver and gallbladder complaints (traditional use): Folk use linked bitter plants with the liver and with "bilis". Tlanchalagua was given for this in Mexican practice. In rodent studies, extracts have reduced chemical liver damage. That work is early and does not transfer to people. No human trials exist. Liver and gallbladder disease needs proper tests and a doctor.
• Malaria (historic use): The herb was used against fevers thought to be malaria, in both Europe and the Americas. Lab tests show some activity against parasites in a dish. There is no evidence it treats malaria in people. Malaria can kill within days. It needs drugs that are known to work, started fast.
• High blood sugar (traditional claim): Some Latin American practice used the tea for diabetes. Animal studies have shown blood sugar falling after extracts. There are no human trials. The animal data is not strong enough to guide anyone's care. If you take diabetes medicine, this is a reason for caution, not hope. Talk to your doctor first.

Which foods are rich in tlanchalagua?

Centaury is not a nutrient, so no food is "rich" in it. It does appear as a bitter flavouring in some vermouths and aperitifs, in small amounts. Those drinks carry the risks of alcohol, which matter far more than the herb.

What are the side effects of tlanchalagua?

• Stomach pain or burning
• Heartburn or worse acid reflux
• Nausea
• A strong bitter taste that lingers
• Loose stools
• Headache after large amounts
• Skin rash or itching (rare, allergic)

Good to know:

Most people who drink small amounts have no trouble beyond the taste.

The common problems are stomach ones. Burning, reflux and nausea show up most in people who already have a sensitive stomach.

Serious harm is rare in the reports we have. But the herb has never been through formal safety testing, so rare effects could be missed. Stop if any new symptom starts and does not settle.

How much tlanchalagua should you take?

• Recommended daily: This page gives label ranges only, not advice for you. Product labels for dried centaury herb often list about 1 to 2 g per cup of tea. Daily totals on labels usually sit near 6 g of dried herb. Tincture labels commonly list a few millilitres a day, split into doses. Strength varies a lot between batches, so two teas at the same weight can differ. Ask a pharmacist or doctor before you set any amount, especially if you take regular medicines.
• Best time of day: Traditional use puts it about 15 to 30 minutes before a meal. The logic is that the bitter taste reaches the tongue before food arrives. Taking it long after eating does not fit that idea. The timing is tradition, not a tested rule.
• With or without food: It is normally taken before food, on a fairly empty stomach. That is also when it is most likely to sting if your stomach is sensitive. If it burns or brings on heartburn, stop. Taking it with food blunts the bitter taste, which is the whole point of it.
• Time to effect: If a bitter does anything for your appetite, you tend to notice it at the next meal. For vaguer claims, such as liver support, there is no honest timeline to give. It may do nothing at all. No result after two weeks is a signal to stop, not to take more.
• How long to take it: It has been used short-term, around meals, for days to a few weeks. There is no safety data on taking it for months or years. Long daily use has not been studied in people. If appetite or digestion has not improved after about two weeks, stop and get the cause looked at.