My Dr. suggested this oil about five years ago for my hair and skin. I ingest it though. I put five or six drops in a spoonful of tea and swallow it fast. I do this everyday. It's too potent to take by it's self. The smell is too strong to keep it on my skin. It will make me sick to smell it after a few minutes. It has changed my skin, my feet seldom get dry and flaky anymore and my aches and pains seem to never get worse. North American Wild oil of Oregano is the the most potent.