Hermetica Superfood Encyclopedia
Pau d'arco (Tabebuia impetiginosa) contains lapachol and beta-lapachone, naphthoquinone compounds that inhibit topoisomerase enzymes and disrupt cellular energy production in pathogens. This Brazilian tree bark extract demonstrates antimicrobial, anti-inflammatory, and immune-supporting properties through multiple cellular mechanisms.
Health Benefits
Origin & History
Lapacho, also known as Pau d'Arco, is derived from the inner bark of the Tabebuia impetiginosa tree, native to the rainforests of South America, particularly Brazil and Argentina. It is harvested by stripping the bark from the tree, which is then dried and processed into various forms such as teas, capsules, and extracts.
Scientific Research
Research on Lapacho includes some in vitro and animal studies suggesting potential antimicrobial and anti-inflammatory properties. However, there is a lack of robust human clinical trials, such as randomized controlled trials (RCTs), to support these claims conclusively.
Preparation & Dosage
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.
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.
How It Works
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 in pathogenic organisms. The compounds modulate nuclear factor-kappa B (NF-κB) pathways, reducing inflammatory cytokine production while enhancing T-cell and natural killer cell activity.
Clinical Evidence
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 and anti-inflammatory effects, more robust human clinical trials are needed to establish definitive therapeutic benefits.
Safety & 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.
Also Known As
Frequently Asked Questions
What is the active compound in pau d'arco?
How much pau d'arco should I take daily?
Can pau d'arco help with candida overgrowth?
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Is pau d'arco safe during pregnancy and breastfeeding?
What is the difference between pau d'arco bark tea and extract supplements?
Who should avoid pau d'arco supplements?
Conditions This May Help
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