Rhatany Extract: Benefits, Uses, How to Use It Safely, and What the Evidence Actually Shows

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Rhatany extract is a tannin-rich preparation made from the dried root and root bark of Krameria lappacea (older name Krameria triandra), a low shrub from the dry Andean highlands of Peru, Bolivia, Chile, and Argentina. [Kew Science, accessed 2026] Its main documented use is as a short-term mouth rinse or gargle for mild inflammation of the gums, mouth, and throat. [ESCOP, 2017] [Commission E (Germany), 1990s]

Here is the honest picture. The traditional and topical use — gargles, rinses, and short-term application to small areas of inflamed tissue — is supported by long-standing European phytotherapy practice and laboratory work on its tannins and lignans.

The broader claims you may see online — that drinking rhatany tea treats gastroenteritis in children, cures vaginal infections, or is safe for routine internal use — are not supported by good human evidence and carry real risks. This guide walks through both, separates strong evidence from weak, and tells you when to stop and call a clinician.

What is rhatany?

Rhatany (also written ratany or ratanhia) is the root of Krameria lappacea, a small, hemiparasitic shrub in the family Krameriaceae. The plant grows in semi-arid, high-altitude soils in the Andes and partially feeds off the roots of neighboring plants for water and minerals. [Kew Science, accessed 2026] The medicinal part is the woody, reddish root, especially its bark.

The older Latin name Krameria triandra is still used on many product labels and in older textbooks, but botanists now treat that name as a synonym of Krameria lappacea. [Wikipedia: Krameria lappacea, 2025] A related species, Krameria argentea (Brazilian or para rhatany), is sometimes substituted in commercial extracts, which is one reason quality varies between products. [WebMD, accessed 2026]

A short history

Peruvian women in 18th- and 19th-century Lima reportedly chewed rhatany root to clean teeth and tighten gums before festivals. The Spanish physician Hipólito Ruiz introduced the plant to European medicine in 1797, and rhatany remained a common pharmacy item across Europe and the Americas between roughly 1820 and 1920, mostly as an astringent for bleeding gums, mouth sores, and mild diarrhea. By the mid-20th century it had largely faded from clinical pharmacology textbooks but is still listed in the European Pharmacopoeia and in the herbal monograph published by the European Scientific Cooperative on Phytotherapy. [ESCOP, 2017]

What is actually in rhatany extract

Rhatany root contains a fairly small set of well-characterized compounds. Knowing them helps explain what the extract can and cannot reasonably do.

Compound class	What it does
Condensed tannins (proanthocyanidins) — roughly 8–15% of the dried root	Astringent: binds proteins in inflamed mucous membranes, tightening tissue and slowing minor bleeding. Most of rhatany’s local action comes from this fraction.
Lignan derivatives (ratanhiaphenols I, II, III, conocarpan and related benzofurans)	Anti-inflammatory in lab and animal models; inhibit prostaglandin and leukotriene formation and NF-κB signaling.
Phenolic acids (chlorogenic acid, caffeic acid)	Antioxidant; contribute to free-radical scavenging in cell models.
Phlobaphenes, starch, sugars, wax, gum	Largely structural; the reddish color of the root comes from phlobaphenes.

Sources for the chemistry:  [Scholz & Rimpler, Planta Medica, 1989] [Baumgartner et al., J. Pharm. Biomed. Anal., 2011] [ESCOP, 2017].

Rhatany extract benefits: what the evidence supports

1. Short-term relief of mild mouth and throat inflammation

This is the only use that has both regulatory recognition and a plausible mechanism. The German Commission E approved rhatany root for mild inflammation of the oral and pharyngeal mucosa, including denture pressure points, and ESCOP lists the same indication, plus gingivitis and pharyngitis. [ESCOP, 2017] [Commission E, 1990s] The mechanism is straightforward: tannins precipitate surface proteins on inflamed tissue, forming a thin protective layer that reduces irritation and slows minor bleeding from gums.

In practice this means short-term use as a rinse or gargle, two or three times a day, for a few days — not as a daily mouthwash forever, and not as a substitute for treating the cause of bleeding gums. If you have suspected gingivitis or persistent gum bleeding, the underlying issue is plaque, and that requires brushing, flossing, and a dental cleaning. [Cleveland Clinic, 2026]

2. Topical astringent action on minor skin and anal irritation

Traditional and ESCOP-listed external uses include compresses or sitz baths for hemorrhoids and anal fissures and compresses for chilblains. The astringent rationale is the same as the gum use, and rhatany has been combined historically with other tannin-rich plants such as the oak tree bark. Evidence here is traditional rather than from modern clinical trials, so think of rhatany sitz baths as a supportive measure for symptom comfort, not a cure. For more options, see the site’s list of herbs for hemorrhoids and the guide to psyllium for softer stools, which addresses one of the underlying causes.

3. Antioxidant and photoprotective activity (lab only)

A 2002 study at the University of Milan tested a standardized Krameria triandra extract (15% neolignans) in rat red blood cells and cultured human keratinocytes exposed to UVB radiation. The extract reduced cell damage at concentrations between 2.5 and 20 µg/ml and outperformed alpha-tocopherol (vitamin E) in one assay. The authors suggested potential use in topical sunscreen-style formulations. [Carini et al., Planta Medica, 2002] Useful to know — but this was a cell-culture study, not a sun-protection trial in people. It is not evidence that rhatany prevents sunburn or skin cancer.

4. Anti-inflammatory effects in animal and cell models

Lignan derivatives isolated from rhatany roots — particularly 2-(2-hydroxy-4-methoxyphenyl)-5-(3-hydroxypropyl)benzofuran and (+)-conocarpan — reduced ear edema and leukocyte infiltration in a mouse croton-oil model of dermatitis, with activity profiles broadly comparable to hydrocortisone in that test. [Baumgartner et al., J. Nat. Prod., 2011] In vitro, the same compounds inhibit NF-κB and the production of prostaglandins and leukotrienes. This work supports the traditional anti-inflammatory use but does not establish efficacy in humans for any specific condition.

5. Antimicrobial activity (lab only)

In a 2025 in vitro study, a methanolic extract of K. lappacea inhibited gram-positive bacteria including Staphylococcus aureus and Listeria monocytogenes, with weaker activity against E. coli and Salmonella enterica. [Abdel-Gaber et al., Frontiers in Microbiology, 2025] Earlier animal work showed an aqueous root extract reduced parasite load and intestinal inflammation in mice infected with the coccidian parasite Eimeria papillata, though not as effectively as the reference drug amprolium. [Frontiers in Immunology, 2024] Again — these are cell and animal results, not evidence that rhatany treats infections in humans.

Claims about rhatany extract that need more caution

Several uses for rhatany still circulate online and in older herbal books that the current evidence does not support. The most important to be honest about:

•  Treating gastroenteritis or colitis by drinking rhatany decoction — particularly in children. The historical recommendation to give children rhatany tea for diarrhea is outdated. Large oral doses of tannin-rich preparations can irritate the stomach, and tannins can interfere with iron and protein absorption. WHO and the EMA Assessment Report flag rhatany as inappropriate for children, pregnancy, and lactation, and large oral doses are not advised. Diarrhea in a child needs evaluation, not herbs.
•  Vaginal irrigations for leukorrhea or vaginitis. Vaginal douching of any kind — herbal or otherwise — is generally discouraged by gynecology guidelines because it disrupts normal flora and can worsen infection. Persistent vaginal discharge needs a diagnosis.
•  Treating angina (chest pain) or heart disease. Listed on some consumer supplement sites; there is no good clinical evidence and using rhatany for chest pain is unsafe because it can delay real cardiac care.
•  Long-term internal use as a tonic. Rhatany is rated only as possibly safe by mouth for less than two weeks; longer-term oral use has not been studied for safety.

If a source claims rhatany cures, prevents, or reverses a disease, that source is going beyond the evidence.

How to use rhatany extract

Rhatany is sold as cut and dried root, powdered root, tincture, and as a liquid extract — usually marketed for oral rinses or short-term external use. The directions below reflect ESCOP and Commission E guidance for topical and oropharyngeal use; they are not a recommendation to take rhatany internally. [ESCOP, 2017]

Mouthwash or gargle for mild gum, mouth, or throat irritation

1. Decoction. Simmer about 1.5 grams (roughly 1 level teaspoon) of cut rhatany root in 150 ml (about 2/3 cup) of water for 10 to 15 minutes, then strain.
2. Tincture. Dilute 5 to 10 drops of tincture in a small glass of water (about 100 ml).
3. Rinse or gargle for 30 to 60 seconds, then spit out. Do not swallow. Use two to three times daily for no more than two weeks, then stop. If symptoms have not improved in a few days, see a dentist or doctor.

Sitz bath or compress for external use

For external use only on intact skin, a stronger decoction (about 20 grams of root per liter of water, simmered 10 minutes and strained) can be used as a sitz bath or applied with a cotton compress for short periods. Limit topical use to two weeks, since longer-term skin exposure has not been studied for safety. [WebMD, accessed 2026]

Side effects, interactions, and who should avoid rhatany

Rhatany is considered possibly safe when applied topically or used as a short-term rinse for less than two weeks. Reported issues include:

•  Stomach upset and nausea if swallowed — especially with larger oral doses (tannins can be irritating).
•  Rare allergic reactions in the lining of the mouth and throat, including itching, swelling, or rash. Stop use and seek medical help for swelling of the lips or tongue or trouble breathing.
•  Possible reduced absorption of iron and other minerals if taken internally over time, because tannins bind these in the gut.
•  Possible product quality issues — related Krameria species are sometimes substituted without label disclosure.

Do not use rhatany if you:

•  are pregnant or breastfeeding (insufficient safety data)
•  are giving it to a child or infant (oral use not recommended; see WHO and EMA guidance)
•  have a known allergy to rhatany or other Krameria species
•  have a chronic liver condition (tannin-heavy oral preparations are best avoided)
•  take prescription medicines without first checking with a pharmacist — tannins can affect absorption of some drugs and minerals if rhatany is swallowed

Sustainability note

Wild-harvested rhatany has come under pressure in its native range, and K. lappacea is treated as endangered in parts of Peru and Bolivia. If you do use rhatany products, choose suppliers that disclose sustainable sourcing or cultivated material.

When to talk to a healthcare professional

Rhatany may calm short-term mouth or throat discomfort, but it does not treat the underlying cause of most oral problems. Call a dentist or doctor — do not rely on rinses — if any of the following occur:

•  Bleeding gums that do not stop after a week of better oral care
•  A mouth ulcer that has not healed in three weeks (oral cancer needs to be ruled out)
•  Severe throat pain, difficulty swallowing, drooling, or fever (possible bacterial infection or abscess)
•  Throat or mouth swelling, hives, or trouble breathing after using any herbal product
•  Rectal bleeding, sudden change in bowel habits, or anal pain that lasts more than a few days
•  Symptoms in a child, an older adult, or anyone who is pregnant — get a clinical assessment rather than self-treating

For background on common oral causes, the Cleveland Clinic guide to gingivitis and the MedlinePlus page on sore throat are good starting points.

Health Disclaimer This article is for educational and informational purposes only. It is not medical advice, a diagnosis, or a treatment plan, and it is not a substitute for the judgment of a qualified healthcare professional who knows your individual history. Herbal products, including rhatany extract, can interact with medicines and may not be safe for everyone. Talk to a licensed clinician, dentist, or pharmacist before starting any herbal product — especially if you are pregnant, breastfeeding, considering use in a child, managing a chronic condition such as liver or kidney disease, or taking prescription medication. If you have any symptom that is severe, getting worse, or not improving with self-care, contact a healthcare provider. In a medical emergency, call your local emergency number. See the site’s full Medical Advice Disclaimer for more.

Frequently Asked Questions

References

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3. Baumgartner L, Sosa S, Atanasov AG, et al. Lignan derivatives from Krameria lappacea roots inhibit acute inflammation in vivo and pro-inflammatory mediators in vitro. Journal of Natural Products. 2011;74(8):1779-1786. doi:10.1021/np200343t. → View source
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6. Abdel-Gaber R, Albeshr M, Dkhil MA, et al. Antibacterial activity of Krameria lappacea root extract against gram-positive and gram-negative bacteria and its cytotoxicity on lung and breast cancer cell lines. Frontiers in Microbiology. 2025;16:1662564. doi:10.3389/fmicb.2025.1662564. → View source
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