Yes - according to what I´m using its an Essential Oil which also means its a 100% pure extract, distilled from fresh plants and flowers. The one I have (I read somewhere) is supposed to be the best and is called "Origanum vulgari. Its very potent and you must use it very carefully to start off with.... burns like crazy!! I´ve started using it after Oil Pulling and gargling with Salt then I gargle once again with just one drop of Oregano Oil. This I feel does a LOT to clear even more sinuses and has helped keeping colds/sorethroat away. Also I imagine it´s good for the gums. Another thing I remember reading on Curezone is that you need to take Probiotics if using more Oregano Oil because it works like an Antibiotic
and kills off a lot of friendly bacteria.
Voilá thats about all I know ;)...hope its a bit of a help!!