Synopsis

Source of validity: Traditional
Rating (out of 5): 2

Birch (Betula spp.), particularly birch bark and leaves, has a long history of traditional use in European and Asian folk medicine for various skin conditions, including dermatitis. Traditional applications often involved topical preparations such as infusions, ointments, or poultices made from birch leaves or bark, believed to have anti-inflammatory, antimicrobial, and soothing properties. The rationale for its use in dermatitis stems from these reported effects, as well as its tannin and flavonoid content, which may contribute to astringent and healing actions on irritated skin. Historical texts and ethnobotanical surveys document birch as a remedy for rashes, eczema, and general skin irritation. However, scientific support for birch's efficacy in treating dermatitis is limited. While some laboratory studies have indicated that birch extracts possess anti-inflammatory and antimicrobial activities, there is a lack of robust clinical trials or systematic reviews specifically evaluating birch preparations for dermatitis in humans. Most available evidence is either anecdotal or derived from in vitro and animal studies. Therefore, while traditional use is well documented, modern scientific validation remains weak, justifying a moderate evidence rating.

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