Do you have any other symptoms that might suggest bacterial overgrowth, like bloating or gas?
Sometimes, I do have gas and/or bloating. It depends on what I eat I guess.
What I'm looking for really is to get rid of the bad taste in my mouth when I wake-up in the AM. During ths day it's not so bad and I do brush my teeth every single time that I eat.
I did go for a test last year, forget the name at the moment; however, they made me drink this chalky substance (it was horrible) before taking some X-rays.
The result came back normal.
I have a hard time beleiving that since I do have some type of bitter, sour, metallic taste when I wake up no matter what I eat and whether I eat or not before bedtime, etc ...