Faith, Thanks for the answer but I think you may be missing the point. I have had the same reaction with other oxygen produsts. I would also like to point out that many people use these products successfully with no reaction. Cellfood is now sold in every health food store that I get into. There must be thousands of people using this product right now. I think I may probably have the same reaction to ozone that i have had to the other products. I don't think it's the products. It's probably my own personal biological makeup. Could it be die-off reactions or an overtaxed liver or both. Maybe it's something else. I won't rule out a reaction but seeing my previous experience with other products and other people's positive experiences with these products, I find it unlikely.