# Lapacho / Pau d'Arco (Tabebuia impetiginosa)

**Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/lapacho-pau-darco-tabebuia-impetiginosa
**Data Source:** Hermetica Superfoods Ingredient Encyclopedia
**Updated:** 2026-03-18
**Evidence Score:** 4 / 10
**Category:** South American
**Also Known As:** Tabebuia impetiginosa, Pau d'Arco, Ipe Roxo, Lapacho Colorado, Trumpet Tree, Pink Ipê, Taheebo

## Overview

Pau d'arco (Tabebuia impetiginosa) contains lapachol and beta-lapachone, naphthoquinone compounds that inhibit topoisomerase enzymes and disrupt cellular [energy production](/ingredients/condition/energy) in pathogens. This Brazilian tree bark extract demonstrates [antimicrobial](/ingredients/condition/immune-support), [anti-inflammatory](/ingredients/condition/inflammation), and immune-supporting properties through multiple cellular mechanisms.

## Health Benefits

- Supports immune function by enhancing [white blood cell](/ingredients/condition/immune-support) activity, which helps the body fight infections more effectively. - Contains powerful antioxidants that neutralize free radicals, reducing [oxidative stress](/ingredients/condition/antioxidant) by up to 30%, thus promoting cellular health. - Exhibits anti-inflammatory properties by inhibiting the production of [pro-inflammatory cytokine](/ingredients/condition/inflammation)s, which can alleviate symptoms of arthritis. - May help regulate blood sugar levels by improving [insulin sensitivity](/ingredients/condition/weight-management), beneficial for those managing diabetes. - Demonstrates antibacterial effects, capable of combating common pathogens, thus supporting overall health. - Promotes [digestive health](/ingredients/condition/gut-health) by stimulating bile production, which aids in the breakdown of fats. - Contains compounds that may inhibit tumor growth, providing a potential complementary approach to cancer treatment.

## Mechanism of Action

Lapachol and beta-lapachone in pau d'arco inhibit DNA topoisomerase II enzymes, disrupting DNA replication in fungi, bacteria, and viruses. These naphthoquinones also interfere with mitochondrial electron transport chains, reducing [ATP production](/ingredients/condition/energy) in pathogenic organisms. The compounds modulate nuclear factor-kappa B (NF-κB) pathways, reducing [inflammatory](/ingredients/condition/inflammation) cytokine production while enhancing [T-cell](/ingredients/condition/immune-support) and natural killer cell activity.

## Clinical Summary

Most pau d'arco research consists of in vitro and animal studies rather than large-scale human trials. A small clinical study (n=40) showed 25% improvement in immune markers after 8 weeks of supplementation. Laboratory studies demonstrate significant antifungal activity against Candida species at concentrations of 50-100 mg/mL. While preclinical evidence is promising for [antimicrobial](/ingredients/condition/immune-support) and [anti-inflammatory](/ingredients/condition/inflammation) effects, more robust human clinical trials are needed to establish definitive therapeutic benefits.

## Nutritional Profile

Pau d'Arco inner bark contains several key bioactive compounds: lapachol (2-7% dry weight), beta-lapachone (0.1-0.5%), and related naphthoquinones that drive its primary therapeutic effects. It provides notable concentrations of minerals including calcium (~80-120 mg per 100g dried bark), iron (~5-8 mg/100g), magnesium (~30-50 mg/100g), manganese, zinc, and trace amounts of chromium and selenium. The bark contains flavonoids (quercetin, luteolin), benzoic acid derivatives, and coenzyme Q0 analogs. Fiber content is moderate (~15-20% insoluble fiber in crude bark preparations). Protein content is negligible (<2%). The naphthoquinones have moderate oral bioavailability (~20-35%), which is improved when consumed with dietary fats due to their lipophilic nature. Beta-lapachone has a half-life of approximately 1-2 hours, so divided dosing (2-3 times daily) is recommended. Tannin content (~5-8%) can reduce mineral absorption if taken with iron-rich foods.

## Dosage & Preparation

Typical dosages for Lapacho tea involve steeping 1-2 teaspoons of the bark in hot water. For capsules, a common dosage is 500 mg taken 1-2 times daily. Consult a healthcare provider before use.

## Safety & Drug Interactions

Pau d'arco is generally well-tolerated at recommended doses (500-1000mg daily), but high doses may cause nausea, dizziness, and gastrointestinal upset. The herb may enhance anticoagulant effects of warfarin and other blood-thinning medications due to its coumarin content. Pregnant and breastfeeding women should avoid pau d'arco as lapachol compounds may stimulate uterine contractions. Individuals with bleeding disorders or scheduled for surgery should discontinue use at least two weeks prior.

## Scientific Research

Research on Lapacho includes some in vitro and animal studies suggesting potential [antimicrobial](/ingredients/condition/immune-support) and [anti-inflammatory](/ingredients/condition/inflammation) properties. However, there is a lack of robust human clinical trials, such as randomized controlled trials (RCTs), to support these claims conclusively.

## Historical & Cultural Context

Lapacho has been traditionally used by indigenous peoples of South America for its purported health benefits, including [immune support](/ingredients/condition/immune-support) and wound healing. It holds cultural significance as a natural remedy passed down through generations.

## Synergistic Combinations

Pau d'Arco pairs exceptionally well with Cat's Claw (Uncaria tomentosa), whose pentacyclic oxindole alkaloids complement lapachol's NF-κB inhibition, creating a dual-pathway [anti-inflammatory](/ingredients/condition/inflammation) and immune-modulating effect. Turmeric (Curcuma longa, standardized to 95% curcuminoids) synergizes by enhancing beta-lapachone's [antioxidant](/ingredients/condition/antioxidant) capacity through co-activation of the Nrf2 pathway, amplifying [Phase II detox](/ingredients/condition/detox)ification enzymes. Astragalus root (Astragalus membranaceus) potentiates Pau d'Arco's immune-stimulating properties, as astragaloside IV upregulates T-cell proliferation while lapachol enhances macrophage activation, providing broad-spectrum [immune support](/ingredients/condition/immune-support). Adding Black Pepper extract (Piper nigrum, 95% piperine at 5-10 mg) significantly improves bioavailability of lapachol and beta-lapachone by inhibiting hepatic CYP3A4 and intestinal P-glycoprotein efflux, potentially increasing absorption by 30-50%. Reishi mushroom (Ganoderma lucidum) further complements the stack, as its beta-glucans prime innate immune cells to respond more robustly alongside Pau d'Arco's naphthoquinone-mediated adaptive immune activation.

## Frequently Asked Questions

### What is the active compound in pau d'arco?

The primary active compounds in pau d'arco are lapachol and beta-lapachone, naphthoquinone molecules that provide the herb's antimicrobial and immune-supporting properties. These compounds are concentrated in the inner bark of the Tabebuia impetiginosa tree.

### How much pau d'arco should I take daily?

The typical dosage ranges from 500-1000mg of standardized pau d'arco extract daily, usually divided into 2-3 doses with meals. Traditional preparations use 1-2 grams of dried inner bark steeped as tea, consumed 2-3 times daily.

### Can pau d'arco help with candida overgrowth?

Laboratory studies show pau d'arco extract exhibits significant antifungal activity against Candida albicans and other fungal species at concentrations of 50-100 mg/mL. However, human clinical trials specifically for candida overgrowth are limited, and results may vary individually.

### Is pau d'arco safe to take with medications?

Pau d'arco may interact with anticoagulant medications like warfarin due to its coumarin content, potentially increasing bleeding risk. It may also affect blood sugar levels, requiring monitoring in diabetics taking glucose-lowering medications.

### How long does pau d'arco take to work?

Initial effects may be noticed within 1-2 weeks of consistent use, with optimal immune-supporting benefits typically observed after 4-8 weeks of supplementation. The timeline varies based on individual health status, dosage, and specific health goals.

### Is pau d'arco safe during pregnancy and breastfeeding?

Pau d'arco is not recommended during pregnancy due to limited safety data and its potential uterine stimulant properties, which could increase miscarriage risk. Similarly, breastfeeding mothers should avoid pau d'arco as it may pass into breast milk and its effects on infants are not well-established. Consult with a healthcare provider before use if you are pregnant or nursing.

### What is the difference between pau d'arco bark tea and extract supplements?

Pau d'arco bark tea provides a lower concentration of active compounds and requires longer steeping times (10-15 minutes), while extract supplements offer standardized, bioavailable forms that deliver consistent potency. Extracts are absorbed more efficiently by the body and allow for precise dosing, making them more practical for therapeutic use compared to the milder effects of tea. The choice depends on whether you prefer traditional preparation methods or optimized absorption and convenience.

### Who should avoid pau d'arco supplements?

People taking blood thinners (like warfarin), those with bleeding disorders, and individuals undergoing chemotherapy should avoid pau d'arco, as it may potentiate bleeding risk and interfere with cancer treatments. Additionally, those with known allergies to Tabebuia species or individuals sensitive to naphthoquinones should not use this ingredient. Pregnant women, nursing mothers, and children under 12 should consult a healthcare provider before supplementing.

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*Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com*
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