Cuachalalate Bark (Amphipterygium adstringens): Benefits, Uses & Safety

If you’ve spent any time in Mexican herbal medicine circles, you’ve probably heard of cuachalalate bark before you ever saw it written down — it’s usually just “cuachala” in conversation. Steeped as a tea, it’s one of the more well-known traditional remedies for stomach trouble and gum health, and it’s become easier to find outside Mexico in recent years. But a lot of what’s written about it online treats “traditional use” and “proven benefit” as the same thing, when they’re not. Here’s what’s actually been studied, what hasn’t, and where the real evidence stands.

Quick Summary

Cuachalalate is the bark of a Mexican tree (Amphipterygium adstringens) traditionally brewed into tea for digestive complaints and oral hygiene. The strongest evidence so far comes from animal studies showing it protects the stomach lining and calms colon inflammation — promising, but not yet confirmed in humans. Older claims that it treats cancer, malaria, or kidney disease come from lab and mouse research only, not from any human trials, and shouldn’t be treated as medical fact. The plant is also endangered in parts of Mexico due to overharvesting, which is worth knowing before you buy. If you’re pregnant, breastfeeding, or on medication, talk to a doctor before adding it to your routine.

What is Cuachalalate?

Cuachalalate comes from a tree native to the tropical forests of Mexico, where it also goes by cuachalalá, volador, palo santo, and cáscara. It flowers between July and August and fruits through January, but it’s the bark — not the fruit — that people actually use. Steeped into tea, it has a mild, slightly bitter flavor that some people describe as having a faint chocolate note.

Because the bark is what’s harvested, and because harvesting bark often means cutting the tree down rather than just picking leaves or fruit, cuachalalate has been overharvested in parts of Mexico. Amphipterygium adstringens was added to Mexico’s list of species at risk in 2004. Local growers have been working on more sustainable harvesting and replanting efforts since, so if you’re buying cuachalalate, it’s worth asking a supplier where and how it was sourced — the plant’s future availability depends on it.

Traditionally, cuachalalate has been used for digestive issues, oral health, and skin problems, and some traditional accounts go further, describing it as a remedy for serious conditions like stomach cancer, malaria, and kidney disease. None of those specific claims have been tested in human clinical trials. What has been studied — mostly in animals and in the lab — is summarized below, along with exactly what kind of evidence backs each claim.

Cuachalalate Benefits and Uses

May Support Digestive Health

This is cuachalalate’s best-researched traditional use, and the evidence — while still animal-based — is more consistent than for most of the plant’s other claimed benefits. In a rat study, a methanol extract of the bark protected the stomach lining from damage even at low doses, and researchers linked the effect to the plant’s anti-inflammatory compounds.¹ A separate study using a mouse model of ulcerative colitis found that an alcoholic extract of the bark reduced colon inflammation and lowered several inflammatory markers.² Neither study has been replicated in humans yet, so think of this as a well-supported animal finding rather than a confirmed human benefit — though it does help explain why the tea has been used for stomach complaints for generations.

May Have Antimicrobial Effects, Including Against H. pylori

Lab (in vitro) research has found that cuachalalate extract can inhibit the growth of several bacteria and fungi, including Helicobacter pylori — the bacteria behind most stomach ulcers — as well as several species linked to gum disease and cavities, like Streptococcus mutans and Porphyromonas gingivalis.³ This lines up with cuachalalate’s long history as a folk remedy for tooth pain and gum problems, similar to how certain antiviral and antimicrobial herbs have traditional dental uses that lab research is starting to explain. Still, “kills bacteria in a petri dish” is a long way from “treats gum disease in your mouth” — no human trials have tested cuachalalate for oral health outcomes directly.

May Reduce Inflammation

Beyond the digestive-specific findings, a 2004 animal study tested both a water-based and a hexane extract of cuachalalate bark in two different inflammation models. Both extracts reduced inflammation, but through what appear to be different mechanisms — the hexane extract worked better in one model, the water extract in the other.⁴ Again, this is animal data only, and dosing in mice doesn’t translate directly to a cup of tea.

Traditional Use for Skin

Cuachalalate has a long history as a topical treatment for wounds, lesions, and minor skin irritation in Mexican folk medicine, and some people also use it on more stubborn issues like boils and acne. This use hasn’t been tested in a clinical study, so it sits firmly in traditional-use territory rather than confirmed benefit. If you’re considering it for a baby’s skin or a young child, that’s worth raising with a pediatrician first — there’s no safety research on cuachalalate in infants, and “traditionally used” isn’t the same as “studied and safe.”

Possible UV Protection (Patent-Stage, Not Clinical Research)

A 2010 patent filing describes a cuachalalate extract that can absorb UV radiation and was proposed as an ingredient for sun-protection and skin-lesion products.⁵ It’s worth being clear about what a patent actually is: it protects an invention or formulation idea, not a proven clinical outcome. No published human studies have tested cuachalalate for sunburn prevention or skin protection, so this is more “an interesting compound worth studying” than an established benefit.

What About Cancer?

Cuachalalate has a long history in Mexican traditional medicine as a treatment for cancer, and lab and animal research on this goes back to the early 1960s, when extracts were shown to slow tumor growth in mice with mammary adenocarcinoma.⁶ More recent work has looked at specific compounds in the bark called anacardic acids, which showed antitumor activity and reduced chemotherapy side effects in mice with breast tumors,⁷ and lab studies have found that extracts can kill several types of human cancer cells in a dish.⁸

None of this has been tested in human cancer patients, and animal and cell-culture results frequently don’t hold up in clinical trials. Cuachalalate is not a cancer treatment, and it shouldn’t be used as a substitute for oncology care or in place of a treatment your doctor has recommended. If you’re interested in the research for your own reasons, that’s reasonable — just bring it to your oncologist as a conversation, not a plan.

Cuachalalate Side Effects

Cuachalalate is generally considered safe when used traditionally as a tea, but it hasn’t been well studied for side effects, drug interactions, or long-term use. If you’re pregnant or breastfeeding, it’s best to avoid it — there’s no safety data either way. And because so little is known about how it interacts with medications, check with a doctor or pharmacist before combining it with anything you’re already taking, especially if you’re managing a chronic condition.

Cuachalalate can help prevent new cavities from forming thanks to its antimicrobial activity, but it won’t fix a cavity that’s already there — that still needs a dentist.

Recommended Dosage

There’s no established clinical dosage for cuachalalate — most of what’s out there comes from traditional use and individual sellers’ recommendations rather than research. It’s typically prepared as a tea, either from loose bark or pre-measured tea bags, and some people apply the brewed liquid topically or use it as a mouth rinse for gum health. If you’re using dried bark, start with a small amount steeped for several minutes and see how you tolerate it before making it a daily habit.

Conclusion

Cuachalalate has a genuinely interesting research profile for a plant most people outside Mexico have never heard of — gastroprotective and colitis-related animal studies are fairly consistent, and the antimicrobial findings help explain centuries of traditional dental use. But some of the biggest traditional claims, especially around cancer, are still stuck at the animal and lab-dish stage, and it’s important not to let “studied since the 1960s” get confused with “clinically proven.” If you’re drinking it as a traditional tea for digestion or oral health, the traditional use has some scientific backing behind it. If you’re hoping it treats a serious illness, that’s a conversation for your doctor, not a cup of tea.

FAQs

References

In Vitro Antimicrobial and Antiproliferative Activity of Amphipterygium adstringens. Evid Based Complement Alternat Med. 2015. https://pmc.ncbi.nlm.nih.gov/articles/PMC4584240/

Navarrete A, et al. Gastroprotection and effect of the simultaneous administration of Cuachalalate (Amphipterygium adstringens) on the pharmacokinetics and anti-inflammatory activity of diclofenac in rats. J Pharm Pharmacol. 2005. https://pubmed.ncbi.nlm.nih.gov/16354407/

Rodríguez-Canales M, et al. Protective Effect of Amphipterygium adstringens Extract on Dextran Sulphate Sodium-Induced Ulcerative Colitis in Mice. Evid Based Complement Alternat Med. 2016. https://pmc.ncbi.nlm.nih.gov/articles/PMC5011223/

Rodríguez-García A, et al. In Vitro Antimicrobial and Antiproliferative Activity of Amphipterygium adstringens. Evid Based Complement Alternat Med. 2015. https://pmc.ncbi.nlm.nih.gov/articles/PMC4584240/

Oviedo-Chávez I, et al. Principles of the bark of Amphipterygium adstringens (Julianaceae) with anti-inflammatory activity. Phytomedicine. 2004. https://pubmed.ncbi.nlm.nih.gov/15330500/

Production of standardized extracts of the plant known as “cuachalalate” (Amphipterygium adstringens) and uses thereof in the field of sun protection. Patent WO2012078018A1, filed 2010. https://patents.google.com/patent/WO2012078018A1/en

Gonzalez EE, et al. Anticancer evaluation of Amphipterygium adstringens. J Pharm Sci. 1963. https://www.sciencedirect.com/science/article/abs/pii/S002235491533690X

Anacardic Acids from Amphipterygium adstringens Confer Cytoprotection Against 5-Fluorouracil and Carboplatin Induced Blood Cell Toxicity While Increasing Antitumoral Activity and Survival in an Animal Model of Breast Cancer. Molecules. 2021;26(11):3241. https://doi.org/10.3390/molecules26113241