Oregano essential oil as a therapeutic agent against parasitic and fungal infections: efficacy and pediatric safety considerations
Isabella Taylor
2026-03-17
4 min. read
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Origanum vulgare, commonly referred to as oregano, serves not only as a culinary herb but also as a source of a potent essential oil with documented bioactive properties. Emerging research indicates that its primary compounds—most notably carvacrol and thymol—may exhibit antiparasitic and antifungal effects. What is the scientific rationale behind its use in infectious conditions, and could it be considered a supplementary therapeutic option for pediatric populations? In which additional clinical scenarios might its application be warranted?
Oregano oil for parasites
Interest in herbal preparations for the treatment of diseases, not only parasitic diseases, continues to grow. In the context of intestinal parasites, oregano oil was shown to be beneficial in inhibiting the development of parasites in animals. In an in vivo study in humans conducted in group 13. Patients with seven gastrointestinal diseases: Blastocystis hominis, Entamoeba hartmanni and Endolimax nana and diseases of the intestinal tract, 600 mg of diluted oregane oil was also administered for 6 weeks. In all subjects, elimination of the parasites was observed (Entamoeba chappannina was active in four cases, Endolix may be active in eight cases, and Blastomyces lambda was responsible for one case, etc.). In other cases, studies, it was found to be more effective in controlling and improving the effects of antibiotic oil on the body than in patients with other diseases, such as cardiovascular diseases.
Oregano oil for mushrooms
The effectiveness of oregano oil and its two main ingredients has been demonstrated in vitro and in vivo. Compared to other essential oils tested (mint, bile, and lavender), oregana oil had the highest anti-fungal activity and was effective even after diluting to one-tenth of the concentrations of the remaining oils. It resulted in a 95% reduction in the number of metabolically active cells within 6 hours of exposure. Among the main constituents of the oil were carvacrol and carvacorol, which showed the highest levels of antifungal activity.[3] Studies have shown that carvacarol oil can be effective against infections caused by alopecia, as well as anti-cancer infections. Candida and its anti-inflammatory properties in women, suggesting a similar prohibitory effect in the treatment of cancer.[5][6]
Oregano oil for external use
Externally, oregano oil may be used in: foot and nail fungus; candidiasis [7]; in case of bites and itching of the skin. A few drops may be rubbed into areas affected by the pathogenic process. If redness or irritation occurs, the oil should be discontinued; as an anti-fungal shampoo supplement. In this case, a few droplets of oil must be added to the cosmetic product, carefully applied to the hair along with the shampoo until it is cleared, applied on the scalp and hair for a few minutes, and then coated; a gel to the soap in the mouth or under the shower.
Oregano oil for children
Oregano oil should not be used in young children. In no case should it be injected into the nose as it may damage the mucous membrane. It should be handled carefully so as not to get into the eyes. It must be remembered that this oil is usually sold in high concentrations and dilution is necessary before use. A drop of olive oil can be diluted in relation to 4 drops of any first pressed olive oil or coconut oil. It can also be used as an inhalation.
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