Epilobium parviflorum (Epilobium parviflorum): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does Epilobium parviflorum work for prostate health?

Epilobium parviflorum contains bioactive ellagitannins, specifically oenotheins A and B, which demonstrate anti-inflammatory and antioxidant properties. These compounds appear to inhibit 5-alpha-reductase, the enzyme that converts testosterone to dihydrotestosterone (DHT), a key factor in benign prostatic hyperplasia (BPH) development. The herb also contains flavonoids that support urinary tract health. Evidence level: C (preclinical studies). Traditional use by Austrian herbalist Maria Treben popularized its application for prostate conditions.

Does Epilobium parviflorum interact with any medications?

There are no well-documented drug interactions for Epilobium parviflorum in current scientific literature. However, due to its potential effects on hormone metabolism through 5-alpha-reductase inhibition, caution is advised when taking it alongside hormonal medications or prostate drugs such as finasteride or dutasteride. The herb may theoretically enhance the effects of anti-androgenic therapies. Always consult a healthcare provider before combining herbal remedies with prescription medications. Evidence level: C (theoretical interactions based on mechanism).

What is the recommended dosage of Epilobium parviflorum tea?

The standard adult dosage for Epilobium parviflorum is 3-5 grams of dried herb prepared as an infusion, consumed 2-3 times daily. To prepare, steep the dried herb in boiling water for 10-15 minutes. This traditional dosage has been used for prostate and urinary tract support. For chronic conditions like BPH, consistent daily use over several weeks is typically recommended. Evidence level: Traditional use. Always follow manufacturer instructions if using commercial preparations.

Is Epilobium parviflorum safe during pregnancy and breastfeeding?

Epilobium parviflorum is considered unsafe during pregnancy and should be avoided. Due to its effects on hormone metabolism, particularly its potential anti-androgenic activity through 5-alpha-reductase inhibition, there is theoretical risk of hormonal disruption during fetal development. There is insufficient safety data for use during breastfeeding. Women who are pregnant, planning pregnancy, or nursing should not use this herb. Evidence level: C (theoretical concerns based on mechanism of action).

Does Epilobium parviflorum help with enlarged prostate (BPH)?

Epilobium parviflorum has been traditionally used for benign prostatic hyperplasia (BPH) management, popularized by Austrian herbalist Maria Treben. Preclinical research suggests anti-inflammatory effects and potential inhibition of prostate cell proliferation through ellagitannin compounds. While traditional evidence supports its use for urinary symptoms associated with BPH, clinical trial data in humans remains limited. Evidence level: C. Men with diagnosed BPH should consult a healthcare provider for proper monitoring rather than self-treating.

What are the side effects of Epilobium parviflorum?

Epilobium parviflorum is generally well-tolerated with few reported side effects. Rare adverse reactions may include mild gastrointestinal discomfort or allergic skin responses in sensitive individuals. No serious adverse events have been documented in traditional use. The herb has a long history of safe use in European folk medicine. However, quality and purity of commercial products can vary. Discontinue use if any unusual symptoms occur and consult a healthcare provider. Evidence level: Traditional use with limited formal safety studies.

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 25 articles PubMed · modèle : gemma4:31b

Résumé

Epilobium parviflorum (hoary willowherb) is a medicinal plant used traditionally for prostate-associated ailments, demonstrating antioxidant, anti-inflammatory, and 5-alpha-reductase-inhibiting properties [PMID:40362886, PMID:19107731, PMID:8778238].

Contexte

Epilobium parviflorum Schreb., also known as hoary willowherb, is a member of the Onagraceae family [PMID:40362886]. It is utilized as a remedy in folk medicine, particularly in Central Europe, for various therapeutic applications [PMID:40362886, PMID:8778238].

Usages traditionnels

It is traditionally used for the treatment of benign prostatic hyperplasia (BPH), prostatitis, and other urinary tract disorders [PMID:40362886, PMID:40001361, PMID:19013046].

Composés actifs

The plant is rich in bioactive phenolic compounds, including ellagitannins, hydrolyzable tannins, and flavonol 3-O-glycosides [PMID:40362886, PMID:40001361]. A key active compound identified is the macrocyclic tannin oenothein B [PMID:19013046, PMID:8778238]. Other identified constituents include quercetin-3-O-glucuronide and myricetin-3-O-rhamnoside [PMID:23436427].

Mécanisme d'action

E. parviflorum exhibits 5-alpha-reductase inhibition via oenothein B [PMID:8778238]. It demonstrates anti-inflammatory activity through the inhibition of COX-1 and COX-2 enzymes, which decreases PGE(2) release [PMID:19107731, PMID:16122891]. Additionally, it shows antioxidant capacity by scavenging DPPH and hydroxyl radicals and inhibiting lipid peroxidation [PMID:19107731, PMID:34685671, PMID:16122891].

Preuves cliniques

Preuve BBenign Prostatic Hyperplasia (BPH) in humans

A herbal preparation containing E. parviflorum (among other ingredients) showed a significant reduction in the International Prostate Specific Score (IPSS) total median score over 3 months [PMID:23642948]

Preuve DBenign Prostatic Hyperplasia (BPH) in canines

Oral administration of E. parviflorum extract for 60 days resulted in a 40% decrease in prostate volume and a 20-30% decrease in serum testosterone concentration [PMID:40033986]

Preuve DProstate Cancer (LNCaP cells)

Extracts inhibited LNCaP cell proliferation (IC50 ~35 µg/ml), reduced PSA secretion, and inhibited arginase activity in vitro [PMID:23436427]

Preuve DMalignant Melanoma

Methanolic extracts demonstrated cytotoxic potential in human malignant melanoma cell lines (A375 and COLO-679) in vitro [PMID:37111814]

Sécurité et effets indésirables

In a canine study, the extract was well tolerated with no observed side effects over 60 days [PMID:40033986]. In vitro Ames/Salmonella tests indicated that the aqueous extract has no mutagenic effect [PMID:32544580].

Synthèse des preuves

Evidence consists primarily of in vitro studies (D) and animal case reports (D), with one Phase II RCT (B) involving a multi-ingredient formula. There is strong in vitro evidence for antioxidant and anti-inflammatory activity, but limited high-level clinical evidence for isolated E. parviflorum in humans.

Sources PubMed

1.PMID: 38201729 (2023) — Influence of Epilobium parviflorum Herbal Extract on Physicochemical Properties of Thermoplastic Starch Films. · Polymers
2.PMID: 38518615 (2024) — Development of UV-Vis spectroscopy-based analysis method for determination of tin(IV) in epilobium parviflorum (hoary willowherb) tea using deep eutectic solvent based preconcentration. · Food chemistry
3.PMID: 40362886 (2025) — The Involvement of Epilobium parviflorum in Different Human Diseases, with Particular Attention to Its Antioxidant and Anti-Inflammatory Properties and Benefits to Vascular Health. · Nutrients
4.PMID: 32544580 (2020) — Synthesis, characterization, biological activities and molecular docking of Epilobium parviflorum aqueous extract loaded chitosan nanoparticles. · International journal of biological macromolecules
5.PMID: 37111814 (2023)

Epilobium parviflorum

Sources et citations

Calculer une dose sûre de Epilobium parviflorum

Co Voi

Blueberry Leaf

Kunzea Ambigua

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Epilobium parviflorum

Sources et citations

Calculer une dose sûre de Epilobium parviflorum

Plantes associées

Co Voi

Blueberry Leaf

Kunzea Ambigua

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales