@Ruggercat, I believe you're right about the use of hydrogen peroxide in oxygenated toothpaste. I tried some a few years ago and it did seem to work better than regular toothpaste in a lot of ways. My wife tried it and said it triggered a few mouth ulcers. She has a sensitivity to some of the detergents found in toothpaste. I'd recommend buying the smallest tube available in order to see if you can tolerate it or not.