SuperStrength Oreganol P73 is three times as potent as the original Oreganol P73. Always certified-wild and Non-GMO. It has been researched and tested by Georgetown University and other research facilities. SuperStrength Oreganol P73 can be used topically and internally. Available in both .45 oz and 1 oz dropper bottles, as well as 60 count gelcaps (each containing 6 drops of oil). This is the ideal type for topical use.