[quote=Markus]Kevin, assuming that you do not drink really cheap stuff, there should not be acetaldehyde in the alcohol you drink. Acetaldehyde is generated by alcohol dehydrogenase (an enzyme), inside cells. [/quote]
I'll have to go back and re-read the article, I was under the impression that any alcohol would cause the reaction, not just your 20 year old Scotch, hence my query about the alcohol in Mouthwash. Seems that could cause quite a stir in the industry (do I smell more warning labels?)

[quote=Markus]BTW how on earth do you tolerate 50% proof mouthwash???!! [/quote]
Oh hell no... I just managed my first beer 2 weeks ago. But if you look, there are products that hit over 25% alcohol. No wonder it burns ! I am a Biotene user for life now !