queñua

What is queñua?

Queñua is a small, twisted tree of the high Andes, Polylepis racemosa. Its bark peels away in thin, papery, red-brown sheets. That is why people call it the paper tree.

In Andean folk practice, the bark and leaves were brewed into teas. People drank them for coughs, chills and aching joints. The same tree gave villages firewood, timber and shelter for crops.

Here is the honest verdict on the evidence. No human trials of queñua have been published. Long traditional use is not proof that it works, and it is not proof that it is safe.

This page treats queñua as a traditional remedy with unknown effect. It also flags one point most sellers skip. Polylepis trees are rare and protected in parts of the Andes, and bark stripping harms them.

How does queñua work?

Nobody has shown how queñua acts in the human body.

Lab work on Polylepis bark points to tannins and flavonoids. In test tubes, these plant chemicals mop up free radicals, which are unstable particles that can damage cells. Whether that matters inside a person is unknown.

Tannins are astringent. They bind to proteins and make tissue feel tight and dry. That may be why old recipes used the bark as a gargle or a wash, but this has not been tested in people.

Some Andean healers gave queñua to people who struggled to breathe at altitude. No study has tested it for altitude sickness. Treat the idea as folklore, not as a finding.

What forms does queñua come in?

Queñua is sold mostly as dried bark or dried leaf for tea.

Forms you may meet: - loose dried bark, in strips or chips - dried leaves, often blended with other Andean herbs - tea bags sold in markets in Peru and Bolivia - tinctures or capsules, rarely, from small local makers

Quality control is weak. A bag labelled queñua may hold a different Polylepis species. Few products state a tested strength or a batch number.

The wood and resin are also burned as fuel or used in building. Those uses are not medicinal and are not covered here.

Queñua is hard to find outside the Andes. Online sellers are rarely tested by anyone.

Where it comes from:

Andean peoples used queñua long before the Spanish arrived. The Quechua name queñua, also written quewiña, is centuries old.

Healers in Peru, Bolivia and Ecuador brewed the bark and leaves. Field surveys record teas for coughs, chills and body aches. Some accounts mention washes for sores and sore throats.

The tree mattered for more than medicine. It grows higher than almost any other tree, up to about 4,500 metres. Communities relied on it for fuel, timber and windbreaks.

Polylepis woodlands have shrunk badly from cutting and grazing. Several species are now protected. Many conservation groups ask people not to buy wild-stripped bark at all.

What does queñua help with?

• cough and chest colds: This is the best-known folk use. Andean healers brewed the bark into a warm tea for coughs and chills. No human trial has tested queñua for a cough. A warm drink can soothe a sore, scratchy throat on its own. That comfort may be most of what people noticed.
• sore throat: Tradition used the cooled tea as a gargle. Tannins in bark are astringent, which can make tissue feel tighter and drier. That effect is shown in test tubes, not in throat trials. There is no human evidence that queñua shortens a sore throat or treats an infection.
• aching joints and muscles: Some Andean accounts describe queñua tea or washes for rheumatic pain. Lab work on related plant extracts suggests antioxidant activity. Antioxidant activity in a test tube does not mean pain relief in a person. No trial has measured joint pain with queñua.
• urinary complaints: Folk use included teas for burning or sluggish urination. There is no study of queñua for urinary problems. Burning urine, fever or back pain can mean a kidney infection. That needs a doctor, not a tea.
• altitude sickness (soroche): Some highland reports mention queñua for breathlessness at altitude. This claim has never been tested. Altitude sickness can turn dangerous fast. Severe cases need descent, oxygen or proper medicines. Do not rely on any herb for it.
• washing minor sores and wounds: Cooled bark washes were used on small sores in some communities. Tannins can tighten the surface of tissue in lab settings. No trial shows faster healing in people. Home washes made from unclean bark can carry germs into a wound.

What are the side effects of queñua?

• nausea or stomach upset
• constipation
• a dry, puckering feeling in the mouth
• lower iron absorption from food and tablets
• allergic rash or itching
• unknown effects with long daily use

Good to know:

Side effects have not been tracked in any study, so nothing here is counted.

The listed problems are the ones expected from any strong, tannin-rich bark tea. Most are mild and settle when you stop.

Stop and seek advice if you get a rash, swelling, yellow skin or dark urine. Those are not expected and need checking.

How much queñua should you take?

• Recommended daily: There is no established dose for queñua. No trial has tested one, and products are not standardised. Where local tea products carry a label at all, they usually describe about 1 to 2 grams of dried bark steeped in a cup of hot water, once or twice a day. That is what a label may say. It is not a recommendation for you, and it rests on custom rather than testing. Ask a doctor or pharmacist before you try it, especially if you take daily medicine.
• Best time of day: Time of day does not matter for any known effect. People drank it warm when symptoms bothered them, often in the evening. If you take iron tablets, keep them well apart from the tea. Tannins in bark can block iron uptake.
• With or without food: Either is fine for safety reasons that are known. Bark teas are high in tannins and can upset an empty stomach. Taking it with food may reduce queasiness. Food may also blunt iron absorption further, so avoid iron-rich meals at the same time.
• Time to effect: There is no reliable answer, because no effect has been proven. A warm drink may soothe a throat within minutes. That is the drink, not the herb. Queñua may do nothing at all for your symptom.
• How long to take it: No safe length of use is known. There are no long-term safety studies. Traditional use was short and occasional, for a passing cough or ache. Daily use for weeks has never been studied. If a symptom lasts more than a week or two, see a doctor instead of continuing.