A 2017 study found that oregano essential oil, especially from the leaves of the oregano plant, has strong antioxidant properties. The researchers noted the traditional use of oregano oil in treating fevers and respiratory symptoms, which are both associated with the flu.
Internet herb stores claim that swallowing oregano oil can cure your cold or flu. ... Oregano oil is an antimicrobial, and can even kill off that tough cruise ship plague, norovirus—but there's no evidence it can do so inside your body, scientists say. It works to inactivate pathogens before they get inside.
Oregano oil is an essential oil made from the oregano plant that is purported to have healing properties. Research shows oregano oil has antimicrobial, antiviral and antifungal properties. In addition compounds in oregano oil are also potent antioxidant, anti-inflammatory, antidiabetic, and cancer-suppressor agents.