You should read that post, lots of info in there from raster and Able regarding dehydration.
Another thing too is not only does the yeast absorb a lot of the water but when the yeast die off they release acetaldehydes which is a basically similar to alcohol. It does lots of awful things to your body and one of them is dehydration. Many people report that when yeast die off they feel very similar to a long night of drinking and the morning after hangover. That’s because the alcohol robs your body of water, the same as the acetaldehydes. Read up on it.
I’m not sure if you’re on a candida diet right now that is causing die off or you’re taking antifungals but a way to possibly combat this is to take molybdenum. It metabolizes the acetaldehyde and allows the body to remove it. Also milk thistle would be a good idea too for your liver.
Before I started taking molybdenum, I had horrible dry mouth all the time. It’s not 100 percent better but it has improved since I started taking it.
Information regarding molybdenum in the protocol and which to buy.