Synopsis

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

Benzoin siam, a balsamic resin obtained from Styrax tonkinensis, has a longstanding history in traditional medicine. Its use for external ulcerations is primarily supported by traditional practices, notably in Southeast Asian and European herbal medicine. Historically, benzoin tincture has been applied externally as a component of compound tincture of benzoin ("Friar's Balsam") to promote healing of minor wounds, ulcers, and sores. The rationale for its use is based on its mild antiseptic and protective properties, which can help form a barrier over the ulcerated area, reducing infection risk and promoting healing.

However, there is a paucity of robust scientific studies directly validating the efficacy of Benzoin siam in the treatment of external ulcerations. Most supportive information is derived from ethnobotanical sources, historical pharmacopeias, and indirect evidence regarding the anti-inflammatory and antimicrobial properties of benzoin and its volatile components (e.g., benzoic acid). Contemporary medical literature does not provide high-quality clinical trials confirming its benefit for ulcer healing. Therefore, while its use is justified by traditional practice and some plausible pharmacological properties, the evidence supporting its use in this context is limited and should be interpreted with caution.

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