Berberis thunbergii (Berberis thunbergii): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Berberis thunbergii work medicinally?

Berberis thunbergii works primarily through its berberine content, which has demonstrated antimicrobial activity by interfering with bacterial enzyme function and cell adhesion. Berberine activates AMP-activated protein kinase (AMPK), a key enzyme in glucose metabolism, which explains its blood sugar-lowering effects. The plant also contains berbamine and oxyacanthine, which contribute anti-inflammatory and additional antimicrobial properties. These alkaloids work synergistically with flavonoids and tannins to provide therapeutic effects. Evidence level: C (preliminary clinical evidence).

Is Berberis thunbergii safe to take during pregnancy?

No, Berberis thunbergii is contraindicated during pregnancy and breastfeeding. The berberine content can cross the placenta and has been associated with neonatal jaundice and potential fetal harm. Berberine can also transfer through breast milk, making it unsafe for nursing mothers. Additionally, this herb should not be given to neonates or infants. Women of childbearing age should use effective contraception while taking this herb. Evidence level: C (safety concerns well-documented).

What is the recommended dosage for Berberis thunbergii tincture?

The standard adult dosage for Berberis thunbergii tincture is 2-4 ml taken three times daily. This traditional preparation is typically made from the root bark or stems. The tincture should be diluted in water before consumption. Due to limited clinical evidence establishing optimal dosing, users should follow manufacturer guidelines or consult a qualified medical herbalist. Duration of use should be discussed with a healthcare provider. Evidence level: Traditional use.

Does Berberis thunbergii interact with any medications?

Yes, Berberis thunbergii has several potential drug interactions due to its berberine content. It may enhance the effects of diabetes medications, potentially causing hypoglycemia. Berberine inhibits certain cytochrome P450 enzymes and P-glycoprotein, affecting metabolism of drugs including cyclosporine, macrolide antibiotics, and anticoagulants. It may also interact with blood pressure medications and immunosuppressants. Always consult a healthcare provider before combining with prescription medications. Evidence level: C.

What are the traditional medicinal uses of Japanese barberry?

Japanese barberry (Berberis thunbergii) has been used in traditional Japanese medicine for digestive complaints and eye conditions. Throughout temperate Asia, folk medicine practitioners have employed it for treating various infections due to its antimicrobial properties. Modern herbal applications include blood sugar support and reducing inflammation. Despite these traditional uses, clinical evidence remains limited, and the plant is primarily grown as an ornamental shrub in Western gardens. Note: It is considered invasive in North America. Evidence level: C (traditional use with preliminary supporting evidence).

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

Berberis thunbergii (Japanese barberry) is an invasive woody shrub known for its ecological impact on forest understories and its presence in traditional medicine [PMID:22182557, PMID:39326472].

Contexte

Berberis thunbergii is a thorny, perennial, exotic invasive shrub established throughout much of the eastern and midwestern United States [PMID:22182557, PMID:29029041]. It is often used as an ornamental landscape shrub, including the purple-leaved variety atropurpurea [PMID:21632 la95].

Usages traditionnels

Berberis species are known for use in traditional medicine, and the dried roots of plants in the Berberis genus (Berberidis Radix/Sankezhen) are used to treat various ailments [PMID:31744256, PMID:39326472].

Composés actifs

Major phenolic constituents in leaf extracts include rutin, chlorogenic acid, and hesperidin [PMID:41933013], with chlorogenic acid being particularly abundant [PMID:31744256]. Root extracts contain berberine, chrysin, quercetin, and two new prenylated flavonoids, thunbergiols A and B [PMID:27788592].

Mécanisme d'action

In A549 human lung carcinoma cells, leaf extracts demonstrate anticancer activity by modulating phase-specific checkpoints and inducing apoptosis [PMID:41933013].

Preuves cliniques

Preuve DA549 human lung carcinoma (in vitro)

Leaf extract significantly reduced cell viability and induced apoptosis [PMID:41933013]

Preuve DHuman pancreatic cancer (in vitro)

Silver nanoparticles containing B. thunbergii leaf (AgNPs) demonstrated anti-cancer effects [PMID:33811673]

Preuve DBacterial/Fungal infections (in vitro)

Ethanolic extracts of stems and leaves were active against Gram(+) bacteria [PMID:17499939]

Preuve DPlasmodium falciparum (in vitro)

Plant extracts were identified as inhibitory fractions in an anti-malarial screening platform [PMID:27165106]

Synthèse des preuves

The available evidence is primarily based on in vitro laboratory studies (cell lines and microbial assays) and ecological field studies; there are no human clinical trials provided.

Sources PubMed

1.PMID: 31504361 (2019) — Invasive Japanese Barberry, Berberis thunbergii (Ranunculales: Berberidaceae) Is Associated With Simplified Branch-Dwelling and Leaf-Litter Arthropod Communities in a New York Forest. · Environmental entomology
2.PMID: 32391153 (2020) — Physiological indicators of habitat quality for a migratory songbird breeding in a forest invaded by non-native Japanese barberry (Berberis thunbergii). · Conservation physiology
3.PMID: 38260770 (2024) — Pest categorisation of Malacosoma parallela. · EFSA journal. European Food Safety Authority
4.PMID: 24118303 (2014) — Amplicon pyrosequencing reveals the soil microbial diversity associated with invasive Japanese barberry (Berberis thunbergii DC.). · Molecular ecology
5.PMID: 29850912 (2018) — Indirect Effects of Japanese Barberry Infestations on White-Footed Mice Exposure to Borrelia burgdorferi.

Berberis thunbergii

Sources et citations

Calculer une dose sûre de Berberis thunbergii

Bridelia Ferruginea

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Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Berberis thunbergii

Sources et citations

Calculer une dose sûre de Berberis thunbergii

Plantes associées

Bridelia Ferruginea

Kayu Manis Jamu

Pterocarpus santalinus

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Synthèse des preuves

Sources PubMed

Sources gouvernementales