Hercampuri: Uses, Research and Safety of a Bitter Peruvian Herb

Walk through a herbal market in Lima or Huancayo and you’ll find small bundles of a dried plant labeled “hercampuri”. It’s one of Peru’s best-known bitter herbs, sold loose, in tea bags and in capsules, and it’s often marketed abroad as a “fat-burning” or “liver-cleansing” tea. The name is used for a few closely related plants in the gentian family that grow at high altitude in the Andes.

This guide explains what hercampuri is, what people use it for, what the limited research actually shows, possible side effects and who should avoid it, and how to choose a product if you still want to try it. For more plant guides, see our herbs and teas section.

What is hercampuri?

Hercampuri is a common name, not a single species. In Peru it mostly refers to Gentianella alborosea, a low-growing plant with pale pink to white flowers, and to its close relative Gentianella nitida. Both belong to the Gentianaceae, the same family as European gentian (Gentiana lutea), whose root is a classic bitter in aperitifs and cocktail bitters.

Several other Gentianella species are sold in Andean markets too, sometimes under the same or similar names. Studies of Peruvian herb markets have repeatedly found that traditional names don’t map neatly onto one plant species. That matters because two bags labeled hercampuri may not contain the same plant, and nobody has compared how different species behave in the body.

The plants are rich in bitter compounds typical of the gentian family, including iridoids and secoiridoids, xanthones and flavonoids. Researchers have isolated several unusual compounds from G. alborosea, but how much of each ends up in a cup of tea, and what they do in people, is unknown.

Hercampuri also has a conservation problem. The IUCN Red List assessed Gentianella alborosea as Endangered in 2020. Most of what’s sold is wild-harvested from small high-altitude populations, so rising demand from the weight-loss market puts pressure on the plant.

Traditional uses

Hercampuri has a long history in Andean folk medicine, and its main uses have stayed fairly consistent. People drink the tea:

• For digestion: as a bitter before or after heavy meals, to ease bloating and a feeling of fullness.
• For the liver and gallbladder: it’s described as hepatoprotective (liver-protecting) and cholagogue (bile-stimulating), and used after hepatitis or heavy drinking.
• For cholesterol and weight: it’s widely sold in Peru as a slimming tea, and to “clean the blood” and lower cholesterol.
• For blood sugar: as a home remedy for diabetes, often alongside other bitter plants.
• As a diuretic: to reduce water retention.

A 2006 United Nations report on Andean plateau products listed its traditional properties as hepatoprotective, depurative (cleansing), hypoglycemic and diuretic. These are descriptions of how the plant is used, not findings from clinical studies. Traditional use can point researchers in a useful direction, but it doesn’t tell you whether a herb works, how much to take, or how safe it is.

What the research shows

We found no published human trials of hercampuri for any purpose. The research is limited to lab and animal studies, mostly published in Peruvian journals. Each finding below carries an evidence label, explained in our editorial policy.

Antioxidant activity Limited evidence

A 2016 study from the National University of San Marcos in Lima analyzed an extract of Gentianella nitida in the lab. It contained a moderate amount of phenolic compounds and showed antioxidant activity in standard test-tube assays. That’s true of most plants, including everyday foods like tea, coffee and berries. Antioxidant activity in a test tube doesn’t show that drinking the herb protects your cells.

The authors were frank about the gap: they noted that the liver-protecting, bile-stimulating and anti-obesity uses of hercampuri have not been scientifically validated. The study didn’t test toxicity.

Blood sugar Limited evidence

The only study we found that tested hercampuri in a living animal looked at blood sugar in diabetic rats. It compared three Gentianella species, including G. nitida.

A rat dose of 500 mg/kg is far above anything you’d get from a cup of tea, and results in diabetic rats often don’t carry over to people. The study does suggest one practical point: if hercampuri lowers blood sugar at all in people, it could add to the effect of diabetes medicines.

Weight loss Limited evidence

We found no studies, in people or animals, that measured weight loss with hercampuri. Its reputation as a slimming tea seems to come from three things: its diuretic use, which can reduce water weight temporarily; its bitterness, which some people find curbs their appetite; and marketing. Some “slimming” teas sold alongside hercampuri also contain laxative herbs such as senna, which cause weight loss only through fluid and stool loss.

Liver and cholesterol Limited evidence

Despite being sold mainly as a liver tonic, hercampuri hasn’t been tested for liver protection in published controlled studies that we could find, and there are no trials measuring cholesterol. The claim rests on tradition and on general antioxidant tests.

Digestion and appetite Limited evidence

Hercampuri’s use as a digestive bitter is the most plausible of its traditional uses, because it’s a close relative of European gentian. The European Medicines Agency accepts gentian root as a traditional herbal medicine for temporary loss of appetite and mild indigestion, based on long-standing use rather than strong trials. That doesn’t automatically apply to hercampuri, which is a different plant, but it explains why bitter Andean gentians have been used the same way.

How hercampuri is used and how much

There’s no established dose for hercampuri, because it’s never been studied in people. Traditionally, a pinch of the dried plant, or one tea bag, is steeped in a cup of hot water for 5 to 10 minutes, and the tea is drunk once or twice a day, often before meals or in the morning. Capsule products usually contain a few hundred milligrams of powdered herb, but the amounts vary between brands and haven’t been tested for safety or effect.

For comparison, the European Medicines Agency’s traditional dose for European gentian root tea is 0.6 to 2 g of dried root in 150 ml of boiling water, up to three times a day, and it advises seeing a doctor if symptoms last more than two weeks. If you try hercampuri, staying in a similarly modest range, for a short time, is the cautious approach.

Side effects and who should avoid it

Hercampuri’s safety hasn’t been studied. No toxicity tests were reported in the studies we found, and there are no formal reports of its side effects. Strong bitters in general can cause stomach upset, nausea, heartburn or headache in some people, and diuretic herbs can increase urination. The lack of reported problems doesn’t mean it’s safe; it means nobody has looked carefully.

Weight-loss teas carry an extra risk: products sold online as hercampuri slimming blends sometimes contain other ingredients, including stimulant or laxative herbs, and US authorities have found hidden prescription drugs in some imported weight-loss products. Long-term laxative use can cause dehydration and low potassium.

Choosing a product

If you decide to try hercampuri, these steps lower the risk of getting the wrong plant or a contaminated product:

• Check the Latin name: look for Gentianella alborosea or Gentianella nitida on the label, not just “hercampuri”.
• Read the full ingredient list: avoid “slimming” blends that add senna, cascara, rhubarb root, bitter orange or caffeine unless you know what each does.
• Prefer single-herb tea: plain dried herb or tea bags are easier to judge than capsules with proprietary blends.
• Look for testing: choose sellers that share a certificate of analysis for identity, heavy metals and microbes. Third-party seals such as NSF or USP are rare for this herb, which is a reason to be cautious.
• Skip big promises: products that claim to melt fat, cure fatty liver or replace medicine are making claims nobody has proven.
• Think about sourcing: because the main species is endangered, look for sellers who say how and where it’s harvested.

To learn how to judge any herbal product, see our guide on how to read a supplement label.

Better-studied options for weight and liver health

If you’re drinking hercampuri to lose weight or look after your liver, these approaches have much stronger evidence:

• For fatty liver: losing 5 to 10 percent of body weight is the single most effective step, according to liver specialists. Cutting alcohol, sugary drinks and refined carbs also helps.
• For weight: a modest calorie deficit, enough protein and fiber to keep you full, and regular movement. Protein and fiber help with fullness more reliably than any bitter tea.
• For cholesterol: more soluble fiber from oats, beans and barley, fewer saturated fats, and, if your doctor advises, medicine.
• For blood sugar: regular meals with fiber-rich carbs, activity after meals, and following your diabetes plan.
• For digestion after meals: smaller portions, eating slowly, and a cup of peppermint or ginger tea, which have more research behind them.

Other bitter herbs are also popular for digestion and the liver. Our guide to dandelion tea covers one that’s easier to find and better studied, though its evidence is also limited.

See a doctor if you have yellowing skin or eyes, dark urine, pain under your right ribs, unexplained weight loss, or blood sugar readings that are often high. These need proper testing, not herbal tea. See also our medical disclaimer.

More guides you may find useful: moringa, eyebright, psoralea seeds and aloe vera juice for acid reflux.

Hercampuri FAQ