Essential Oils: Antifungal activity and study methods

Essential oils (EOs) are natural, volatile compounds extracted from plants, known for their diverse biological properties, including potent antifungal activity. This review explores the antifungal mechanisms of EOs, their efficacy against human and plant fungal pathogens, and their applications in medicine, agriculture and food preservation. EOs disrupt fungal cell membranes, inhibit ergosterol biosynthesis, induce oxidative stress and interfere with mitochondrial function and enzymatic pathways, leading to fungal cell death. Their broad-spectrum activity makes them promising alternatives to conventional antifungals, particularly in the face of rising antifungal resistance. Synergistic effects with conventional drugs, such as azoles and polyenes, further enhance their therapeutic potential. However, challenges such as variability in composition, stability, sensory impact and regulatory hurdles limit their widespread adoption. Advanced delivery systems, including nano-encapsulation and emulsification, are being explored to improve EO stability and efficacy. In agriculture, EOs show promise as biocontrol agents against crop pathogens, while in food preservation, they inhibit spoilage fungi and extend shelf life. Future research should focus on optimizing EO formulations, conducting in vivo and clinical studies, and developing regulatory frameworks to facilitate their integration into mainstream applications. By addressing these challenges, EOs can emerge as safe, sustainable and effective antifungal agents, offering innovative solutions across multiple industries.