North American Herb & Spice Oreganol P73 is the original, edible, guaranteed wild harvested oregano oil blend. Mediterannean wild Oreganol P-73 is made with the highest quality materials and cGMP standards. Every handpicked harvest is tested for purity and authenticity. The difference between super strength and regular strength is that the ratio of olive oil to oregano oil is considerably different, by nearly 3-fold. Available in a 13.5ml bottle.