Evidence supporting the use of: Horseradish
For the body system: Sinuses

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Synopsis

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

Horseradish (Armoracia rusticana) has a long history of use in traditional herbal medicine, especially in Europe, for supporting the sinuses and relieving symptoms of upper respiratory congestion. Traditionally, the pungent root has been used as a natural decongestant. Its characteristic heat and strong aroma are due to compounds called isothiocyanates, released when the root is grated or crushed. Folk remedies have employed horseradish to help "clear the head," reduce mucus build-up, and relieve sinus pressure, often by ingesting it directly or using it in preparations.

However, while the traditional use is well documented, scientific evidence supporting horseradish specifically for sinus support is limited. Some laboratory studies suggest that horseradish has mild antimicrobial properties and that isothiocyanates can act as mucolytics (agents that break down mucus), which could explain historical use for respiratory symptoms. Nonetheless, rigorous clinical trials directly assessing horseradish’s efficacy for sinusitis or other sinus-related issues are lacking. The European Medicines Agency acknowledges traditional use for "supportive treatment of respiratory tract infections," but notes the absence of sufficient clinical evidence. Therefore, the use of horseradish for sinuses is rooted primarily in tradition, with a modest basis in plausible mechanisms but little direct scientific validation.

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