Synopsis

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

Eucalyptus, particularly its essential oil (Eucalyptus globulus), is used in the support and treatment of fungal infections and is backed by some scientific evidence. The primary active component, 1,8-cineole (also known as eucalyptol), along with other terpenes present in eucalyptus oil, has demonstrated antifungal properties in several in vitro studies. Research indicates that eucalyptus oil can inhibit the growth of various pathogenic fungi, including Candida albicans and Aspergillus species. For instance, studies published in journals such as Phytotherapy Research and Journal of Ethnopharmacology have shown that eucalyptus oil exhibits fungistatic and fungicidal effects at specific concentrations.

However, the rating is 2/5 because most evidence is laboratory-based, involving direct exposure of fungal cultures to eucalyptus oil or its components. There is a lack of large-scale, well-designed clinical trials confirming efficacy and safety in humans. Furthermore, the effective concentrations observed in vitro may not be achievable on human skin or mucous membranes without causing irritation. Despite these limitations, eucalyptus oil is commonly included in traditional and over-the-counter topical preparations for fungal infections, such as athlete’s foot, suggesting a degree of empirical and traditional usage.

In summary, while there is some scientific basis for the antifungal activity of eucalyptus oil, the evidence is preliminary and mostly preclinical. More robust human studies are needed before eucalyptus can be recommended as a primary treatment for fungal infections.

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