By Dr. Edward Group DC, NP, DACBN, DCBCN, DABFM, Published on February 14, 2017. Oregano oil is extracted from the oregano plant (Origanum vulgare), a perennial herb from the flowering plant family Lamiaceae. Thanks to its high concentration of antioxidants, carvacrol, and other critical vitamins and nutrients, the health benefits of oregano oil are truly staggering. Oregano oil may support gastrointestinal, respiratory, and skin health. Additionally, its chemical makeup is a powerful force against harmful organisms.