If you go under the search engine on the internet that I specified regarding the tongue scraper or just type in bad breath, a bunch of sites will come up. If you read "what causes bad breath" they will explain to you want the over the counter products have in them ingredient wise which helps cause bad breath.

Some products I tried, but to no avail. The only thing that seemed to work for me is what I have written above.

Hope that was of some help to you.