Hamamelis (Hamamelis virginiana): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does witch hazel work to tighten skin and reduce inflammation?

Witch hazel works primarily through its high tannin content, specifically hamamelitannin and proanthocyanidins. These compounds act as astringents by precipitating proteins, which causes tissue contraction and creates a protective barrier on the skin. This mechanism helps tighten pores, reduce excess oil, and soothe inflammation. Evidence Level B supports its efficacy as an astringent and anti-inflammatory agent, making it effective for treating minor skin irritations, insect bites, and superficial wounds by forming a protective layer over damaged tissue.

Does witch hazel interact with any medications?

There are currently no well-documented severe drug interactions associated with standard topical witch hazel use. However, because witch hazel contains tannins, internal consumption may theoretically interfere with the absorption of certain oral medications or iron supplements if taken simultaneously. It is generally advised to avoid internal use in large quantities and to separate administration times from oral medications. Always consult a healthcare provider before combining herbal supplements with prescription drugs (Evidence Level D).

What is the recommended dosage for witch hazel?

For topical applications, witch hazel distillate or extract can be applied to the affected area as needed, typically two to three times daily for skin conditions or hemorrhoids. For internal use, the standard adult dosage is 2 to 3 grams of dried bark prepared as a tea. Users should note that most commercial products are distillates intended for external use only. Internal use should be limited due to potential side effects like stomach upset (Evidence Level Traditional).

Is witch hazel safe to use during pregnancy?

Topical witch hazel is generally considered safe during pregnancy and is frequently recommended to soothe hemorrhoids and varicose veins, which are common during gestation. There is no evidence suggesting harm from external application. However, internal use is not recommended during pregnancy due to the potential for stomach upset and a lack of safety data regarding systemic absorption. As always, pregnant individuals should consult their healthcare provider before use (Evidence Level B).

Can witch hazel help treat hemorrhoids?

Yes, witch hazel is a widely recognized natural treatment for hemorrhoids. Its natural astringent properties help shrink swollen blood vessels and reduce itching, pain, and irritation. Applied topically as a liquid, pad, or cream, it provides symptomatic relief for external hemorrhoids. Clinical evidence supports its ability to reduce bleeding and discomfort, and it is a common ingredient in many over-the-counter hemorrhoid preparations due to its proven efficacy (Evidence Level B).

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

Witch hazel (Hamamelis virginiana L.) is a medicinal plant used primarily for dermatological applications due to its anti-inflammatory and astringent properties [PMID:40649262, 40819781].

Contexte

Hamamelis virginiana L. is a North American plant belonging to the Hamamelidaceae family [PMID:37508291, 20171295].

Usages traditionnels

It has been traditionally employed to treat skin inflammation, mucous membrane inflammation, minor wounds, and symptoms of haemorrhoids [PMID:40819781, 40458338].

Composés actifs

The bark and leaves contain tannins (including hamamelitannin), phenolic acids, flavonoids, catechins, and proanthocyanidins [PMID:40649262, 36012541, 35740016].

Mécanisme d'action

Witch hazel exerts anti-inflammatory effects by modulating cytokine expression and impairing NF-κB-driven transcription [PMID:40649262, 36012541, 35740016]. It also demonstrates active-oxygen scavenging activity and can restore the balance between elastin and LOXL1 while decreasing elafin synthesis in skin [PMID:7735233, 30052192].

Preuves cliniques

Preuve BDiaper Dermatitis

Witch hazel is described as an effective and well-tolerated treatment for diaper dermatitis [PMID:28300437]. A randomized trial compared a cream containing 12 mg/100 g of H. virginiana to breast milk for healing in infants [PMID:41468068].

Preuve CHemorrhoids

Witch hazel has shown beneficial therapeutic effects on pain, bleeding, and swelling associated with hemorrhoids [PMID:40458338].

Preuve DFemale Androgenetic Alopecia

A propylene glycol-free, witch hazel-based solution of 5% minoxidil sulfate was evaluated for efficacy and safety in patients who failed to respond to standard minoxidil [PMID:38179008].

Preuve DSensitive Scalp

A witch hazel-based shampoo and tonic were reported by patients to improve subjective manifestations of irritation with good to excellent tolerance [PMID:25210333].

Preuve DAtopic Dermatitis/Eczema

In human keratinocyte models, bark extract inhibited the release of mediators involved in skin autoimmunity (IL-6, IL-17C) and allergy (TSLP, CCL26, MMP-9) [PMID:36012541].

Preuve D

Sécurité et effets indésirables

Witch hazel is described as well-tolerated in the treatment of inflammation and diaper dermatitis [PMID:28300437].

Synthèse des preuves

Evidence is primarily based on in vitro studies (keratinocytes, cancer cell lines) and retrospective or small-scale clinical observations. There is some randomized trial data for diaper dermatitis, but overall clinical evidence for systemic or specific disease treatment is limited.

Sources PubMed

1.PMID: 40819781 (2025) — Chemical composition, skin microbiota metabolism, antimicrobial potential and anti-inflammatory properties of witch hazel bark (Hamamelis virginiana L.). · Journal of ethnopharmacology
2.PMID: 36012541 (2022) — Unveiling the Ability of Witch Hazel (Hamamelis virginiana L.) Bark Extract to Impair Keratinocyte Inflammatory Cascade Typical of Atopic Eczema. · International journal of molecular sciences
3.PMID: 38179008 (2023) — Efficacy, Tolerability, and Superiority of Propylene Glycol-Free, North American Witch-Hazel (Hamamelis virginiana)-Based Solution of 5% Minoxidil Sulfate for the Treatment of Female Androgenetic Alopecia. · International journal of trichology
4.PMID: 40649262 (2025) — Hamamelis virginiana L. in Skin Care: A Review of Its Pharmacological Properties and Cosmetological Applications. · Molecules (Basel, Switzerland)
5.PMID: 35740016

Hamamelis

Sources et citations

Calculer une dose sûre de Hamamelis

Arnica

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Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Hamamelis

Sources et citations

Calculer une dose sûre de Hamamelis

Plantes associées

Arnica

Calendula

Arnica Brasileira

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales