Best Pau d'Arco Supplements in 2026

Pau d'arco, also known as taheebo or lapacho, comes from the inner bark of the Tabebuia tree, which grows throughout the rainforests of Central and South America. Indigenous peoples have used this bark in traditional wellness practices for generations, and modern researchers are studying its bioactive compounds, particularly lapachol and beta-lapachone, for their potential immune-supporting properties.

While research is still in relatively early stages, pau d'arco has developed a dedicated following among those interested in herbal immune support. We reviewed the leading products on the market to identify the five best pau d'arco supplements for 2026.

How We Chose Our Top Picks

We evaluated products based on inner bark sourcing and quality, extraction method and potency, third-party testing and purity, customer reviews, and value per serving. We prioritized supplements that use the inner bark specifically, as this is the part of the tree that contains the highest concentration of bioactive compounds.

Our Top 5 Pau d'Arco Supplements

1. Nature's Way Pau d'Arco Inner Bark

Best Overall

Nature's Way offers a well-established pau d'arco product using 1,090 mg of inner bark per two-capsule serving. The formula is TRU-ID verified, meaning the species has been confirmed through DNA testing. This is a reliable, no-nonsense option from a brand with decades of herbal supplement experience.

• Form: Capsule (inner bark powder)
• Serving Size: 2 capsules (1,090 mg)
• Third-Party Tested: TRU-ID Verified
• Notable Feature: DNA-verified species authenticity

Worth noting: As with any supplement, individual results may vary. Consider starting with a lower dose and gradually increasing as needed. Always check with your healthcare provider before adding a new supplement to your routine.

2. NOW Foods Pau d'Arco 500 mg

Best Value

NOW Foods delivers consistent quality at an accessible price with their 500 mg pau d'arco capsules. The inner bark powder is encapsulated without unnecessary additives. At 250 capsules per bottle, this is an excellent long-term value option.

• Form: Vegetarian capsule
• Serving Size: 2 capsules (1,000 mg)
• Third-Party Tested: GMP Certified
• Notable Feature: 250-count bottle

Worth noting: As with any supplement, individual results may vary. Consider starting with a lower dose and gradually increasing as needed. Always check with your healthcare provider before adding a new supplement to your routine.

3. Herb Pharm Pau d'Arco Liquid Extract

Best Liquid Formula

Herb Pharm uses a proprietary extraction process on sustainably harvested pau d'arco inner bark. The liquid tincture format allows for flexible dosing and may offer faster absorption. Each serving provides a concentrated dose of bark compounds in an easy-to-use dropper bottle.

• Form: Liquid tincture
• Serving Size: 1 ml (approximately 30 drops)
• Third-Party Tested: Yes
• Notable Feature: Sustainably harvested inner bark

Worth noting: As with any supplement, individual results may vary. Consider starting with a lower dose and gradually increasing as needed. Always check with your healthcare provider before adding a new supplement to your routine.

4. Planetary Herbals Pau d'Arco Inner Bark

Best Potency

Planetary Herbals combines pau d'arco inner bark powder with a concentrated inner bark extract for a dual-action formula. This approach provides both the full spectrum of bark compounds and a more concentrated dose of key actives.

• Form: Tablet
• Serving Size: 2 tablets
• Third-Party Tested: Yes
• Notable Feature: Powder plus extract dual formula

Worth noting: As with any supplement, individual results may vary. Consider starting with a lower dose and gradually increasing as needed. Always check with your healthcare provider before adding a new supplement to your routine.

5. Traditional Medicinals Pau d'Arco Tea

Best Tea Option

For those who prefer a traditional preparation method, Traditional Medicinals offers pau d'arco in a convenient tea bag format. The inner bark is sustainably sourced and provides a mild, woody-flavored tea that can be enjoyed daily.

• Form: Herbal tea bags
• Serving Size: 1 tea bag
• Third-Party Tested: Non-GMO Project Verified
• Notable Feature: Pharmacopoeial-grade herbs

Worth noting: As with any supplement, individual results may vary. Consider starting with a lower dose and gradually increasing as needed. Always check with your healthcare provider before adding a new supplement to your routine.

What the Research Suggests

Pau d'arco contains several bioactive compounds, with lapachol and beta-lapachone being the most studied. Preliminary research, mostly conducted in laboratory and animal settings, suggests these compounds may have antioxidant properties and could support immune cell activity. However, it is important to note that most research has not yet progressed to large-scale human clinical trials.

Some early human studies have explored pau d'arco tea consumption and reported generally favorable safety profiles. Research is ongoing, and scientists continue to investigate the mechanisms by which pau d'arco compounds may interact with the immune system.

Buying Considerations

Inner Bark vs. Whole Bark

Always choose supplements that specify inner bark. The outer bark contains far fewer bioactive compounds and may include less desirable material. Reputable manufacturers will clearly label their products as inner bark.

Preparation Method

Pau d'arco has traditionally been prepared as a decoction, meaning the bark is simmered in water for an extended period. Capsules and liquid extracts offer modern convenience, but tea preparations honor the traditional method.

Sourcing

Look for products that mention sustainable sourcing, as overharvesting of Tabebuia trees is an environmental concern. Responsible brands will address their sourcing practices.

Final Thoughts

Pau d'arco is a fascinating herbal supplement with a rich history of traditional use and growing scientific interest. While more human research is needed, the existing evidence and centuries of traditional practice make it a compelling option for those interested in natural immune support. Choose a quality inner bark product from a reputable manufacturer, and consider discussing it with your healthcare provider as part of your overall wellness strategy.

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Key Research

• A large 2022 meta-analysis found that vitamin D supplementation was associated with reduced risk of autoimmune disease (BMJ, 2022).
• The Endocrine Society recommends adults at risk of deficiency maintain serum levels of at least 30 ng/mL (Journal of Clinical Endocrinology & Metabolism, 2011).
• A 2019 meta-analysis found vitamin D supplementation reduced the risk of acute respiratory infections (BMJ, 2019).

Food as Medicine Guide for a comprehensive overview