Certified Organic. Minimum 80% Carvacrol. With Extra Virgin Olive Oil. Antioxidant. . Natural Factors Oil of Oregano is derived from wild-crafted, handpicked Mediterranean oregano leaves. The oil is extracted using steam distillation, remaining completely free of chemical solvents. It is ten blended in a 1:4 ratio with organic, coldpressed, extra-virgin olive oil for improved absorption.