oregano oil

Oil of oregano is a concentrated extract of the oregano plant (Origanum vulgare and related species), the same herb used in cooking. It is sold as a dietary supplement in capsules, softgels, and liquid drops, and its main plant compounds include carvacrol and thymol.

Rigorous evidence in people is limited. NCCIH says there is no strong evidence that oil of oregano, on its own, prevents or treats colds. Its guidance does not single out oregano oil as proven for influenza or flu-like illness either, and no NIH Office of Dietary Supplements or NCCIH fact sheet supports using it to treat or cure any specific condition. Claims of broader health benefits are not backed by strong human research.

There is no established or government-recommended dose for oregano oil supplements, and products vary widely in concentration and how they are prepared. Because federal authorities have not defined a safe or effective amount, talk to your doctor, pharmacist, or another qualified clinician before starting it, especially about how much (if any) is appropriate for you.

Authoritative US government sources do not provide a detailed safety profile for concentrated oregano oil supplements, so its long-term safety is not well characterized. As a general precaution, people who are pregnant or breastfeeding, children, and anyone with a health condition or taking medications should consult a clinician first, and keep in mind that "natural" does not mean risk-free.

High-quality data on side effects from oregano oil supplements are limited in the government sources reviewed. As a general matter, concentrated essential oils can irritate the mouth, throat, stomach, or skin, and some people may have allergic reactions, particularly those allergic to oregano or related plants in the mint family such as basil, sage, or thyme. Stop use and seek care if you develop a rash, swelling, or trouble breathing.

Reliable government data on drug interactions with oregano oil are limited, and any potential oregano-drug interactions are not well characterized in the sources reviewed. To stay safe, tell your doctor and pharmacist about any oregano oil supplement you take or plan to take so they can check it against your current medications.