Oregano oil is a natural essential oil extracted from the leaves of the oregano plant (Origanum vulgare). It is known for its strong aroma and powerful compounds, especially carvacrol and thymol, which give it antibacterial, antifungal, and antioxidant properties. Oregano oil is commonly used in herbal medicine to support the immune system, fight infections, and aid digestion. It can be used in diluted form for topical applications, aromatherapy, or as a dietary supplement. However, because it is very potent, it should always be used carefully and usually diluted with a carrier oil.