Hydrogen peroxide is best known as an antiseptic cleanser for wounds. Farmers also use it as an insecticide. With these in mind, it is hard for some to accept that hydrogen peroxide can actually be taken in orally and intravenously for therapy and other purposes. The truth is, hydrogen peroxide is safe to use, either for topical or internal treatment, as long as it is done properly. Here are some facts about food grade hydrogen peroxide that may be helpful for you to know.