Synopsis

Source of validity: Traditional
Rating (out of 5): 1

Polypodium, a genus of ferns that includes species such as Polypodium vulgare (common polypody), has a long history of use in traditional herbal medicine, particularly in European and some Indigenous American systems. It has been used historically for a variety of ailments, including respiratory complaints and sore throat. The root (rhizome) of Polypodium species was sometimes prepared as a decoction, syrup, or tea thought to soothe irritated mucous membranes of the throat. The basis for this traditional use is likely related to its perceived demulcent and anti-inflammatory effects, although the exact active constituents responsible for these effects are not well-defined.

However, scientific evidence supporting Polypodium’s efficacy in treating sore throat is extremely limited. Modern pharmacological research on this genus has focused more on its potential immunomodulatory and anti-inflammatory properties, but not specifically on sore throat or upper respiratory tract infections. There are no high-quality clinical trials or robust studies that validate its effectiveness for this indication. Thus, while traditional use exists and is documented in historical texts, the evidence base is weak by contemporary standards.

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