What is Pau d'Arco (Taheebo)?

Pau d'Arco is the inner bark of Tabebuia impetiginosa (also known as Handroanthus impetiginosus), a large flowering tree native to Central and South America. It has been used for hundreds — possibly thousands — of years by Indigenous groups including the Tupinambá, Quechua, and Kallawaya healers as a treatment for infections, fevers, and pain. The name 'Pau d'Arco' is Portuguese for 'bow stick,' referencing the tree's hardwood historically used for making bows.

How does Pau d'Arco (Taheebo) work?

Its primary active compounds — lapachol and beta-lapachone — interfere with the energy production of fungi, bacteria, and certain abnormal cells, essentially starving them. These same compounds also calm inflammatory signaling in the body and appear to bolster immune defenses by supporting natural killer cell activity. The bark also contains quercetin and other antioxidants that add broad cellular protection.

What forms does Pau d'Arco (Taheebo) come in?

Traditional bark tea (made by simmering the inner bark) is the most historically authentic form and provides a broad spectrum of compounds. Capsules and tablets offer measured, convenient dosing. Tinctures allow faster absorption and flexible dosing but may have lower lapachol concentrations depending on the extraction method. Look for products standardized to lapachol or naphthoquinone content for best results.

Where it comes from:

Indigenous Amazonian and Andean healers relied on Pau d'Arco for centuries to treat infections, fevers, snake bites, and pain. It was adopted into Brazilian folk medicine and gained international attention in the 1960s–70s when reports of its anticancer and antimicrobial properties sparked scientific interest. It remains a cornerstone of South American herbal medicine and is widely used throughout Brazil and Argentina today.

What does Pau d'Arco (Taheebo) help with?

• Fungal infections and candida overgrowth: Pau d'Arco's naphthoquinone compounds — especially lapachol and beta-lapachone — directly disrupt the cell membranes and energy production of fungi, making it one of the herb's most validated uses. It is widely used to manage candida overgrowth in the gut and recurring fungal skin or nail infections.
• Chronic inflammation and joint pain: The bark's active compounds help dial down inflammatory signals in the body, which can ease joint swelling, pain, and stiffness over time. People with conditions like arthritis or chronic inflammatory conditions often use it as a complementary support alongside dietary changes.
• Weakened immune system: Pau d'Arco appears to activate certain immune cells — including natural killer cells — that serve as the body's first-line defenders against infections and abnormal cells. Regular use is often recommended during periods of immune vulnerability or frequent illness.
• Bacterial infections: Lab studies show strong activity against a range of bacteria, including Staphylococcus aureus and Helicobacter pylori. While human clinical data is limited, traditional use for bacterial infections is extensive and the antimicrobial mechanism is well understood.
• Digestive discomfort and gut issues: By targeting harmful microbes in the gut — including candida, harmful bacteria, and parasites — Pau d'Arco can help restore a healthier gut environment and reduce bloating, discomfort, and irregular digestion. It is often used as part of a gut reset protocol.
• Skin infections and rashes: Applied as a wash or taken internally, Pau d'Arco has a long history of use for fungal skin conditions, eczema-like rashes, and mild bacterial skin infections. Its antimicrobial compounds can help reduce the microbial load driving skin irritation.
• Low energy and fatigue: While not a stimulant, practitioners often report that addressing underlying fungal overgrowth or chronic infection with Pau d'Arco leads to noticeable improvements in energy levels and mental clarity over several weeks.
• Parasitic infections: Traditional Amazonian healers used Pau d'Arco specifically for intestinal parasites, and lab research supports antiparasitic activity against several common organisms. It is still used in integrative medicine protocols addressing parasitic gut infections.

What can Pau d'Arco (Taheebo) help prevent?

• Recurrent candida infections: regular use may help maintain microbial balance and reduce the frequency of fungal flare-ups

Which foods are rich in Pau d'Arco (Taheebo)?

Pau d'Arco is an herbal bark extract and is not found in any food. To support the same goals — fighting fungal overgrowth, reducing inflammation, and boosting immunity — focus on: (1) Garlic: contains allicin, a potent natural antifungal and antibacterial compound; (2) Coconut oil: rich in caprylic acid, which disrupts candida cell membranes similarly to lapachol; (3) Ginger: powerful anti-inflammatory that also supports digestive health; (4) Fermented vegetables (kimchi, sauerkraut): restore beneficial gut bacteria that crowd out pathogens; (5) Turmeric: broad anti-inflammatory and antimicrobial activity. Avoid excess sugar, refined carbohydrates, and alcohol, which fuel fungal overgrowth and inflammation — the primary targets of Pau d'Arco.

What are the side effects of Pau d'Arco (Taheebo)?

• Nausea and stomach upset (especially at high doses or on an empty stomach)
• Dizziness or lightheadedness
• Diarrhea or loose stools
• Increased bleeding tendency at high doses
• Vomiting with excessive intake
• Possible liver stress with prolonged very high-dose use (rare)

Good to know:

Pau d'Arco is generally safe when used at recommended doses for short to moderate periods. Most side effects occur at high doses and are dose-dependent and reversible. Avoid during pregnancy and breastfeeding due to insufficient safety data.

How much Pau d'Arco (Taheebo) should you take?

• Recommended daily: Bark tea: 20–30 g of dried inner bark simmered in 1 liter of water, consumed in 2–3 cups throughout the day. Capsules/tablets: 500–1,000 mg standardized extract, 2–3 times daily. Tincture: 1–2 mL, 2–3 times daily. Keep lapachol intake below 1.5 g/day to avoid adverse effects.
• Best time of day: Spread doses evenly throughout the day; morning and evening dosing works well for capsules or tincture.
• With or without food: Best taken with food or just after meals to minimize the risk of nausea and stomach upset.
• Time to effect: Antifungal or antimicrobial effects: 1–2 weeks. Immune and anti-inflammatory benefits: 3–6 weeks of consistent use.
• How long to take it: For acute fungal or immune support: 4–8 weeks followed by a 2–4 week break. For ongoing support: cycle 6 weeks on, 2–3 weeks off. Avoid uninterrupted long-term use without practitioner guidance.