I read it in Dr. Hulda Clark 's book, Cure for all Diseases about not using hydrogen peroxide if you have metal fillings. It just simply said "don't use hydrogen peroxide if you have metal fillings because they react." She also mentions only using food grade since the commercial store bought kind contains solvents. I don't know much about fillings, all I know is the two I have are metal of some sort. I too would like to get rid of mine.