ALWAYS seek the whole olive leaf and not the commercial extracts sold for big $$$$$$.
For oregano, seek the Turkey Oregano Oil, its sold around the world as many names, Dr. Cass sells the North American brand for as high as $74.95 an ounce for oil diluted with 11 parts olive oil. I sell the same mix for $12.95, I also sell the pure oil in 1/2 ounce up to 1 kilo bottles. 1/2 ounce for internal use will last years for the average person.