# Peumus boldus (Boldo) **Canonical URL:** https://ingredients.hermeticasuperfoods.com/ingredients/peumus-boldus **Data Source:** Hermetica Superfoods Ingredient Encyclopedia **Updated:** 2026-03-19 **Evidence Score:** 6 / 10 **Category:** South American **Also Known As:** Peumus boldus, Chilean boldo, Boldea fragrans, Boldu, Boldina, South American boldo, Boldo-do-Chile ## Overview Boldo (Peumus boldus) is a South American medicinal plant containing boldine alkaloids and phenolic compounds like gallic acid that demonstrate [antioxidant](/ingredients/condition/antioxidant) and [antimicrobial](/ingredients/condition/immune-support) activities. The plant's essential oils and alkaloids show promise for digestive and liver support, though human clinical evidence remains limited. ## Health Benefits • [Antioxidant](/ingredients/condition/antioxidant) properties supported by in vitro studies showing activity from phenolic compounds including gallic acid and quercetin (preliminary evidence only) • [Antimicrobial](/ingredients/condition/immune-support) effects demonstrated in laboratory studies attributed to essential oils and alkaloids (no human clinical data) • Antifungal activity shown in in vitro research linked to boldine and other alkaloids (animal/lab studies only) • Traditional use for digestive support and [liver health](/ingredients/condition/detox) in South American medicine (no clinical trials available) • Anti-parasitic properties observed in laboratory studies due to alkaloid content (preliminary evidence only) ## Mechanism of Action Boldo's primary bioactive compound boldine acts as an antioxidant by scavenging free radicals and protecting cellular membranes from lipid peroxidation. The phenolic compounds including gallic acid and quercetin contribute to [antioxidant activity](/ingredients/condition/antioxidant) through electron donation mechanisms. Essential oils containing eucalyptol and camphor provide [antimicrobial](/ingredients/condition/immune-support) effects by disrupting bacterial cell membranes. ## Clinical Summary Current evidence for boldo is limited to in vitro laboratory studies demonstrating [antioxidant activity](/ingredients/condition/antioxidant) from phenolic compounds. [Antimicrobial](/ingredients/condition/immune-support) effects have been shown in test-tube studies using essential oil extracts against various bacterial and fungal pathogens. No randomized controlled trials in humans have been conducted to validate traditional uses. The existing research consists primarily of preliminary laboratory investigations without clinical translation. ## Nutritional Profile Peumus boldus (Boldo) leaf is primarily valued for its bioactive phytochemical content rather than macronutrient density. Macronutrients: Protein content is minimal (estimated 5-8% dry weight basis, typical of dried aromatic leaves); carbohydrates including structural polysaccharides and tannins contribute to bulk composition; fat content is low (<3% dry weight), with essential oil fraction representing approximately 1-3% of fresh leaf weight. Micronutrients: Contains modest levels of potassium, calcium, and magnesium consistent with dried leaf material; specific mineral concentrations are not well-characterized in standardized analytical literature. Bioactive compounds (primary interest): Alkaloids total approximately 0.25-0.5% dry weight, dominated by boldine (the principal alkaloid, ~25-30 mg/g dry leaf in some reports), with minor alkaloids including isoboldine, reticuline, laurotetanine, and norisocorydine. Flavonoids including quercetin and kaempferol glycosides are present at approximately 1-3% dry weight collectively. Phenolic acids include gallic acid and protocatechuic acid (concentrations vary by harvest and preparation, roughly 2-5 mg/g dry leaf reported for total phenolics in some extracts). Essential oil constituents include ascaridole (a toxic monoterpene peroxide, ~15-30% of essential oil fraction), p-cymene, eucalyptol (1,8-cineole), and linalool. Tannins contribute to astringency. Bioavailability notes: Boldine exhibits moderate oral bioavailability in animal models with hepatic first-pass [metabolism](/ingredients/condition/weight-management); ascaridole content raises safety concerns limiting internal use of essential oil preparations; aqueous infusions (traditional tea) reduce essential oil exposure compared to ethanolic extracts; flavonoid bioavailability is subject to [gut microbiome](/ingredients/condition/gut-health) metabolism as with most plant polyphenols. Human pharmacokinetic data for boldo constituents remains limited. ## Dosage & Preparation No clinically studied dosage ranges for extracts, powder, or standardized forms are available due to the absence of human trials. Traditional use involves preparing leaves as teas, but specific dosages have not been established through clinical research. The European Medicines Agency (2009) has raised safety concerns due to high ascaridole content (16-38% of volatile oil). Consult a healthcare provider before starting any new supplement. ## Safety & Drug Interactions Boldo contains ascaridole, a compound that can be toxic in high doses and may cause liver damage with prolonged use. The herb may interact with anticoagulant medications due to potential effects on blood clotting. Boldo should be avoided during pregnancy and breastfeeding due to insufficient safety data and potential uterine stimulant effects. Short-term use under professional guidance is generally recommended to minimize toxicity risks. ## Scientific Research The research dossier reveals a complete absence of human clinical trials, RCTs, or meta-analyses for Peumus boldus. All reported pharmacological activities including [antioxidant](/ingredients/condition/antioxidant), [antimicrobial](/ingredients/condition/immune-support), antifungal, and anti-parasitic effects are derived exclusively from in vitro and animal studies. No PubMed PMIDs for human studies were identified in the available research. ## Historical & Cultural Context Boldo has been used in Chilean and Latin American traditional medicine for liver diseases, gallstones, and as a digestive aid, with indigenous Peruvian tribes employing it similarly. Historical documentation dates back to 1782 by Molina, with medicinal investigation beginning in 1869 by a French physician. The leaves, which have a camphor-like aroma similar to bay leaves, are commonly prepared as tea in traditional practice. ## Synergistic Combinations Milk thistle, Dandelion root, Artichoke leaf, Turmeric, Alpha-lipoic acid ## Frequently Asked Questions ### What is boldine and how does it work? Boldine is the primary alkaloid in boldo leaves that provides antioxidant protection by neutralizing free radicals and preventing cellular membrane damage. It works through electron donation mechanisms and has shown hepatoprotective effects in laboratory studies. ### Is boldo safe for liver health? While boldo traditionally supports liver function, it contains ascaridole which can be hepatotoxic in high doses or with prolonged use. Short-term use under professional supervision may be safer than long-term supplementation. ### How much boldo is safe to take daily? No standardized human dosage has been established through clinical trials. Traditional preparations typically use 1-2 grams of dried leaves as tea, but professional guidance is recommended due to potential toxicity from ascaridole content. ### Can boldo interact with blood thinning medications? Boldo may potentially interact with anticoagulant medications like warfarin due to possible effects on blood clotting mechanisms. Individuals taking blood thinners should consult healthcare providers before using boldo supplements. ### What compounds make boldo antimicrobial? Boldo's antimicrobial effects come from essential oils containing eucalyptol and camphor, along with various alkaloids. These compounds disrupt bacterial cell membranes and have shown activity against fungi in laboratory studies, though human clinical data is lacking. ### Is boldo safe during pregnancy and breastfeeding? Boldo is not recommended during pregnancy due to limited safety data and traditional use as a uterine stimulant in some cultures. Similarly, there is insufficient evidence to confirm safety during breastfeeding, so pregnant and nursing women should avoid boldo supplementation and consult their healthcare provider before use. ### What does the clinical research actually show about boldo's effectiveness in humans? Most evidence for boldo comes from laboratory and animal studies rather than human clinical trials, meaning efficacy claims are largely preliminary. While in vitro studies demonstrate antioxidant, antimicrobial, and antifungal activity from compounds like boldine and phenolic compounds, these findings have not been consistently validated in rigorous human studies. ### Are there differences between boldo leaf extracts and whole leaf preparations? Boldo leaf extracts are concentrated forms designed to increase bioavailability of active compounds like boldine and alkaloids, while whole leaf preparations contain the plant material in its natural state. Extract forms may deliver higher concentrations of active constituents, but comparative human efficacy data between these forms is limited. --- *Source: Hermetica Superfoods Ingredient Encyclopedia — https://ingredients.hermeticasuperfoods.com* *License: CC BY-NC-SA 4.0 — Attribution required. Commercial use: admin@hermeticasuperfoods.com*