Dr. Donsbach's products (and most other oxy products) have been found to be somewhat effective but simply aren't as potent as peroxide. One ounce of Dr. Donsbach's SuperOxy, for example, has been found to be equal to only 2.5 drops of peroxide. This is likely why it's so much easier to tolerate. If one was trying to take the equivalent of 75 drops per day, this would be pretty expensive!
Did you hear about Dr. Ali from my posts? I didn't realize he also reccomended using oral peroxide. On his website he only talks about bathing in peroxide and IV peroxide and ozone therapy. I'd love to go see Dr. Ali, but unfortunately his office is on the opposite coast from me.