Taheebo tea, also known as Pau D’Arco or Lapacho tea, is an herbal tea made from the inner bark of certain trees native to Central and South America.
It has a long history of traditional use, and it is often promoted for everything from yeast infections and inflammation to arthritis and even cancer. That is quite the wellness résumé, which always makes me want to slow down and ask: what does the research actually say?
Short answer: there are some interesting compounds in pau d’arco, but the human evidence is still limited. And despite the “natural remedy” label, this tea can have side effects and medication interactions, especially for people taking blood thinners or preparing for surgery.
So, is this bitter, woody tea worth adding to your routine? Read on before you start simmering bark like you’re opening a rainforest apothecary.
The Origins
Pau d’arco tea comes from the inner bark of trees in the Tabebuia and Handroanthus genera, which grow throughout parts of South and Central America. In traditional medicine, it has been used by indigenous communities for infections, fever, pain and inflammatory conditions, and sometimes applied externally as a poultice for sore joints.
It later gained popularity among settlers in the region and has been mentioned in herbal medicine literature dating back to the 19th century. Today, you may see it sold as taheebo, lapacho, red lapacho, ipê roxo or pau d’arco.
There are many species that get grouped under the pau d’arco name, which is one of the tricky parts. Not every product contains the same species, the same part of the bark or the same amount of active compounds.
The species most often discussed for medicinal use include Handroanthus impetiginosus, formerly classified as Tabebuia avellanedae. Older herbal sources, including Dr. Daniel B. Mowry’s writing on pau d’arco, emphasize that the inner bark is the part most associated with its traditional health effects.
The main compounds that researchers are interested in are called naphthoquinones, especially lapachol and beta-lapachone. Important detail: lapachol is not the tea itself, but a compound found in the bark.
This matters because a brewed tea may contain very different amounts of these compounds than a concentrated extract. In other words, sipping a cup of tea is not the same as taking a standardized supplement or using a purified compound in a lab study.
Nutritional Facts
Taheebo tea, like most unsweetened herbal teas, contains essentially no calories, carbohydrates, protein or fat. It also should not be thought of as a meaningful source of vitamins or minerals.
Some older reports describe pau d’arco as containing trace nutrients, but the more realistic reason people drink it is not for nutrition. It is for the plant compounds, including lapachol, beta-lapachone and other phenolic compounds, that may have biological activity.
To prepare it traditionally, the shredded inner bark is usually simmered rather than steeped. A common method is to add about one to three teaspoons of bark to one cup of water, bring it to a boil, reduce the heat and simmer for 10 to 20 minutes.
Some older preparations use larger amounts, such as several tablespoons per quart of water. Personally, I would be cautious with stronger preparations, especially since safety data in humans is not exactly overflowing.
After simmering, the tea should be strained and served. Many people add honey, lemon or fruit juice because the flavor is bitter, earthy and a little medicinal.
Due to possible reactions with metals, many herbalists recommend avoiding aluminum cookware when preparing pau d’arco tea. Stainless steel, glass or enamel pots are usually the better choice.
Traditionally, boiled bark was also wrapped in cloth and applied to sore joints. That may sound soothing, but topical use can still irritate the skin in some people, so starting small is the more sensible move.
Most importantly, this is not a tea I would use daily for long periods of time without medical guidance. Long-term safety has not been well studied in humans, and concentrated extracts are a different story than an occasional cup of tea.
Reported Benefits
Most of the reported benefits of taheebo tea focus on infections, inflammation, pain and cancer. That does not mean it has been proven to treat these conditions in people.
This is where the internet tends to get ahead of the science. Lab and animal studies can be interesting, but they are not the same as well-designed human clinical trials.
May Have Antimicrobial Activity
Pau d’arco has been traditionally used for infections of all sorts, including bacterial, fungal and viral conditions. Some laboratory research does support the idea that compounds from the bark may have antimicrobial effects.
For example, researchers C. Perez and C. Anesini found that extracts showed activity against several microbes, including organisms such as salmonella and pseudomonas. Interesting, yes, but again, this was not the same as proving a cup of tea can treat an infection in a real person.
Another study in the Journal of Colorectal Disease looked at immune effects of a pau d’arco-related preparation and suggested it may influence immune function. Still, that does not make it a substitute for antibiotics, antivirals or antifungal medications when those are needed.
That is especially important with infections that can worsen quickly. Natural support is one thing; skipping appropriate medical care is another.
May Have Anti-Inflammatory Effects
Taheebo tea has also been used for pain, especially joint pain and arthritis. This traditional use is one of the reasons researchers have looked at its potential anti-inflammatory effects.
A study from Kuwait University found that mice given pau d’arco extract showed less response to certain painful stimuli. Animal research can help explain possible mechanisms, but it does not tell us the right dose, safety or effectiveness for humans with chronic pain.
Research published in Frontiers in Nutrition has also linked compounds from pau d’arco with anti-inflammatory activity. This may help explain why it has a reputation as a joint-support herb.
However, I would not put it in the same category as proven arthritis treatments. If your joints are painful, swollen or limiting your movement, that deserves a real evaluation, not just a stronger cup of bark tea.
Cancer Claims Need a Lot of Caution
This is the part where we really need to be careful. Pau d’arco is often promoted online as a “cancer-fighting” tea, but there is no strong clinical evidence that drinking taheebo tea treats or prevents cancer in humans.
Some compounds found in pau d’arco, including beta-lapachone, have shown anti-cancer effects in laboratory studies. A review in Current Medicinal Chemistry discussed how these compounds may affect cancer cell survival, invasion and metastasis in experimental settings.
Older cancer research also explored lapachol and related compounds, including work from Harvard researchers looking at whether these compounds could make cancer therapies more effective. But promising lab research is not the same thing as a safe, effective cancer treatment.
As noted by Memorial Sloan Kettering Cancer Center, pau d’arco has not been shown to treat cancer in people, and high doses may cause serious side effects. That sentence is not as exciting as “miracle tea,” but it is far more useful.
If someone is going through cancer treatment, this tea should only be used after talking with the oncology team. Herbs can interact with treatments, affect bleeding risk and complicate care, even when they sound gentle and natural.
The Science Behind the Supplement
The main reason pau d’arco gets scientific attention is because it contains biologically active compounds. These include lapachol, beta-lapachone and other naphthoquinones, which may influence inflammation, oxidative stress, microbes and cell signaling.
The Journal of Integrative Cancer Therapies notes that beta-lapachone, a compound found in red lapacho, may cause apoptosis, or controlled cell death, in certain cancer cells under experimental conditions. That is an important research pathway, but not proof that the tea works the same way in the body.
Another review in the British Journal of Complementary and Alternative Medicine reported that inner bark extracts may affect immune cells, including T-helper cell activity. This could help explain some of the traditional use around infections, but we still need more human research before making strong claims.
One more issue: supplement quality varies. A tea made from bark bought online may not contain the same compounds, species or dose used in a study.
That is not me being dramatic; that is just how herbal products work. Plant part, harvesting, storage, preparation and extraction all matter.
Are There Any Side Effects?
Yes, there can be side effects. The biggest concern with pau d’arco is its potential blood-thinning effect, especially at higher doses or with concentrated supplements.
This means people taking blood-thinning or antiplatelet medications should be especially cautious. That includes medications such as warfarin, heparin, enoxaparin, aspirin, clopidogrel and similar drugs.
It also should be avoided before surgery, dental procedures or any situation where bleeding risk matters. As a general rule, let your doctor know about any herbal tea or supplement you use, even if it seems harmless.
Digestive side effects can also happen, including nausea, vomiting, diarrhea or stomach discomfort. Some people tolerate it better with food, but persistent symptoms are a good reason to stop.
High doses of pau d’arco have been linked to more serious problems, including excessive bleeding, dizziness and anemia. Mount Sinai’s herbal medicine guide also warns against use during pregnancy and while breastfeeding.
Pregnant women should avoid pau d’arco completely. Older research from Brazilian physicians suggested it may have abortive effects, which makes this one of those “not worth the risk” situations.
Children, people with liver or kidney disease and anyone with a bleeding disorder should also avoid using it without medical supervision. Really, this is one of those herbs where the phrase “check with your doctor first” is not just filler.
Natural does not automatically mean safe, especially when an herb has biologically active compounds.
Pros and Cons
Altogether, taheebo tea has a few potential upsides. It has a long history of traditional use, contains interesting plant compounds and shows antimicrobial, anti-inflammatory and anti-cancer activity in early research settings.
It is also naturally caffeine-free, which may appeal to people who want a warm drink without the coffee jitters. And yes, the earthy bitterness may feel very “I am doing something healthy,” if that is your thing.
But the cons are important. Human studies are limited, product quality can vary, and many of the strongest claims are based on test-tube or animal studies rather than clinical trials.
It may also increase bleeding risk, interact with medications, upset the stomach and pose serious risks during pregnancy. That is a lot to know before making it part of your daily wellness routine.
Bottom Line
Taheebo tea is an interesting herbal tea with a long traditional history and some intriguing early science behind it. But at this point, it should not be viewed as a proven treatment for infections, arthritis, cancer or any other medical condition.
There may be potential benefits related to inflammation and immune activity, but we need better human studies before making confident recommendations. And we definitely need more safety data, especially around long-term use.
If you are healthy, not pregnant, not taking blood thinners and simply want to try an occasional cup, it may be reasonable to discuss it with your healthcare provider first. If you are using it to treat a serious condition, please do not let it replace medical care.
My take? Be curious, but be skeptical.
Herbal teas can absolutely have a place in a wellness routine, but they are not magic. And when the claims sound bigger than the evidence, that is usually the perfect time to pour slowly.
Leave Feedback: Was this article helpful?