Ancient Greeks and Romans didn’t know this, but one day their favorite spice would be the subject of several hundred very-precise, scientific studies, some of which would demonstrate impressive clinical results. To them, oregano wasn’t too complicated; it was simply an everyday herb used to fight colds and flus, and occasional cases of indigestion and upset stomachs. Science tells us that oregano oil is rich in potent antioxidants such as phenols, terpenes, and terpenoids. Two phenols, carvacrol and thymol, may help support healthy levels of immune cytokines, a group of compounds that play an important role in the body’s normal inflammatory process. These antioxidants also help to neutralize toxic free radicals and seem to support the immune system when challenged by harmful bacteria, viruses, and persistent fungi.