Synopsis

Source of validity: Scientific
Rating (out of 5): 3

Nasturtium (Tropaeolum majus) has been traditionally used in herbal medicine, particularly in Europe, for its antimicrobial and expectorant properties. However, in recent years, it has also gained scientific interest as a potential alternative or adjunct to antibiotics, especially for uncomplicated respiratory and urinary tract infections. Several clinical studies, primarily from Germany and Switzerland, have evaluated standardized extracts of nasturtium, often in combination with horseradish root (Armoracia rusticana). These trials suggest that such combinations may be as effective as conventional antibiotics for mild infections, with fewer side effects and less risk of promoting antibiotic resistance. The antimicrobial activity of nasturtium is attributed mainly to its glucosinolate-derived isothiocyanates, which inhibit the growth of various bacteria, including some pathogens involved in respiratory and urinary infections. While the data are promising, most clinical trials to date are of moderate quality, with relatively small sample sizes and often funded by manufacturers. As a result, while scientific support exists and is growing, it is not yet robust enough to fully replace antibiotics for serious infections, but nasturtium-based preparations may be considered as supportive measures or alternatives for mild cases under medical supervision.

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