I just wanted to mention... years ago we discovered that oil pulling goes a long way to putting your nasty fasting mouth back in shape!
Drop in to the oil pulling forum for more info, but basically, you take a tablespoon of good oil like virgin coconut, olive or sesame. Swish it around in your mouth, pulling it between your teeth, for 5-20 minutes. A bunch of nasty bacteria and junk end up in the oil, which you spit into a nearby waste receptical. Then brushy brushy and voila! Amazing how great your mouth feels and smells!
Once a day is fine, twice a day if you are an OCD type. This keeps a lot of the bacteria and junk you would swallow out of the ole system, which you are so fervently trying to detox. Can that be bad?