Boldo Leaf (Peumus boldus): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does boldo leaf work to support liver and gallbladder function?

Boldo leaf contains boldine, a unique natural alkaloid with demonstrated choleretic activity, meaning it stimulates bile production and flow from the liver. This mechanism helps improve fat digestion and supports gallbladder function. Boldine also exhibits hepatoprotective antioxidant properties, protecting liver cells from oxidative damage. The volatile oils and flavonoids contribute additional digestive benefits. Evidence level: C (preclinical studies support these mechanisms, though human trials are limited).

Can I take boldo leaf with blood thinners or anticoagulant medications?

No, boldo leaf should be avoided when taking anticoagulant medications such as warfarin, heparin, or antiplatelet drugs. Boldo contains coumarin compounds that possess anticoagulant properties, which can increase bleeding risk when combined with blood-thinning medications. This interaction is clinically significant. Patients on anticoagulant therapy should consult their healthcare provider before using boldo supplements. Evidence level: C (based on constituent pharmacology and theoretical interactions).

What is the recommended dosage for boldo leaf tea or tincture?

The standard adult dosage for boldo leaf is 1-2 grams of dried leaf prepared as a tea, or 2ml of tincture taken three times daily. These doses are based on traditional South American use and pharmacopoeial standards. Boldo should be taken with meals to support digestion. Long-term use beyond 2-4 weeks is not recommended without professional guidance. Always follow product-specific instructions or consult a qualified herbalist. Evidence level: Traditional/C.

Is boldo leaf safe during pregnancy and breastfeeding?

No, boldo leaf is unsafe during pregnancy and should be strictly avoided. The herb contains coumarin compounds that may cause uterine stimulation and pose risks to fetal development. There is insufficient safety data for breastfeeding, so use should also be avoided during lactation. Women who are pregnant, planning pregnancy, or nursing should not use boldo leaf preparations. Evidence level: C (contraindicated based on constituent safety profile).

What conditions is boldo leaf traditionally used to treat?

Boldo leaf is traditionally used across South American medicine for liver and gallbladder disorders, including sluggish bile flow and mild dyspepsia. It's also employed for digestive complaints, headaches, and rheumatism. The herb acts as a liver tonic and hepatoprotective agent. Modern herbal practice primarily focuses on its choleretic and digestive benefits. Evidence level: C (traditional use supported by limited clinical research).

Who should not take boldo leaf supplements?

Boldo leaf is contraindicated in patients with biliary obstruction or gallstones blocking bile ducts, as stimulating bile flow could worsen the condition. It should be avoided during pregnancy due to coumarin content and by those taking anticoagulant medications. People with severe liver disease should consult a healthcare provider before use. High doses may cause diarrhea and gastrointestinal cramping. Evidence level: C/D (based on pharmacology and traditional contraindications).

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Boldo (Peumus boldus M.) is a medicinal plant endemic to Chile, primarily recognized for its antioxidant, anti-inflammatory, and hepatoprotective properties [PMID:39765896, PMID:38234264].

Contexte

Peumus boldus is an endemic Chilean tree whose leaves are rich in bioactive compounds and are used as a herbal remedy in various pharmacopoeias [PMID:39765896, PMID:8202440].

Usages traditionnels

Traditionally employed in folk medicine to treat gastrointestinal disorders, liver ailments, rheumatic symptoms, headache, and urinary tract inflammation [PMID:29080449, PMID:8202440, PMID:34500293].

Composés actifs

The leaves contain aporphine alkaloids (most notably boldine, though composition varies by tree) [PMID:16221469, PMID:29454020], phenolic compounds including catechin, proanthocyanidins, and flavonol glycosides (such as quercetin and kaempferol derivatives) [PMID:12747739, PMID:20022332, PMID:24853276]. Essential oils contain 1,8-cineole, p-cymene, limonene, and ascaridole [PMID:30832296].

Mécanisme d'action

Boldine acts as a potent free radical scavenger and antioxidant [PMID:16221469, PMID:37462836]. It may induce endothelium-dependent vasodilation via nitric oxide and small-conductance Ca2+-activated K+ channels [PMID:35222671]. In neurological contexts, it may block connexin-43 hemichannels and pannexin 1 channels, and suppress AChE and BuChE activity [PMID:37462836, PMID:41353162].

Preuves cliniques

Preuve DHepatotoxicity

A case of probable boldo-induced hepatotoxicity resulting in unexplained jaundice and increased liver enzymes in an 87-year-old man, which resolved upon cessation of use [PMID:33457373]

Preuve DRenal Transplant (Drug Interaction)

A case report of subtherapeutic tacrolimus levels in a renal transplant patient while taking boldo [PMID:24981811]

Preuve DChronic Epilepsy (Murine Model)

Pulverized Boldo leaves reduced seizures, neuroinflammation, and hemichannel activity [PMID:41353162]

Preuve DDysferlinopathy (Murine Model)

Daily oral administration of pulverized leaves improved grip strength, restored endothelial-dependent vasodilation, and reduced skeletal muscle inflammation and lipid accumulation [PMID:41155239]

Preuve DH. pylori (In vitro)

Aqueous extract and catechin-derived proanthocyanidins inhibited H. pylori urease and adherence to gastric cells [PMID:24853276]

Preuve D

Sécurité et effets indésirables

Boldo leaf infusions may be hepatotoxic and cause unexplained jaundice or abnormal liver enzyme values, particularly in elderly patients [PMID:33457373].

Interactions médicamenteuses

A case report indicates a potential interaction with tacrolimus, leading to subtherapeutic drug levels in a renal transplant patient [PMID:24981811].

Synthèse des preuves

The evidence consists primarily of in vitro studies, animal models (mice, Drosophila), and isolated case reports. There are no RCTs or systematic reviews provided; therefore, the overall strength of clinical evidence is low.

Sources PubMed

1.PMID: 39765896 (2024) — Bioactive Content and Antioxidant Properties of Spray-Dried Microencapsulates of Peumus boldus M. Leaf Extracts. · Antioxidants (Basel, Switzerland)
2.PMID: 41353162 (2025) — Boldo leaves reduce seizures, neuroinflammation, and hemichannel activity in a murine model of chronic epilepsy. · Biological research
3.PMID: 33457373 (2020) — Boldo-Induced Hepatotoxicity: A Case of Unexplained Jaundice. · European journal of case reports in internal medicine
4.PMID: 29080449 (2018) — Peumus boldus attenuates copper-induced toxicity in Drosophila melanogaster. · Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
5.PMID: 19145575 (2009) — Effect of boldo (Peumus boldus Molina) infusion on lipoperoxidation induced by cisplatin in mice liver.

Boldo Leaf

Sources et citations

Calculer une dose sûre de Boldo Leaf

Alpinia zerumbet

Mentha Spicata Var

Kheemp Tibetan

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Interactions médicamenteuses

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Boldo Leaf

Sources et citations

Calculer une dose sûre de Boldo Leaf

Plantes associées

Alpinia zerumbet

Mentha Spicata Var

Kheemp Tibetan

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Interactions médicamenteuses

Synthèse des preuves

Sources PubMed

Sources gouvernementales