It will immediately turn into water and oxygen in your stomach/small intestine. As we all should know since birth, gas doesnt absorb to well in the gastrointestinal system. Now if you're looking for colon cleansing it would be much more effective enema style. Even then though id probably dilute or go with a 3% solution. If you're looking for body oxygenation look into breathing techniques,ginko biloba epogen or squalene. i havee read h2o2 can increase oxygenation but only through intravenous means. squalene is supposed to be great against cancer because of its oxygenation benefits, never tried it myself.