Water only fast

I am currently on a water only fast. Just some background. I have completed a 14 day fast in the past. I am on day 11 on my way to 40. As doctors won't supervise the fast cause they don't believe in it, I have decided to take a multivitamin and a little less than 1 tablespoon seawall to ensure I stay safe. So that is the background.

I would appreciate imput on why my lips and skin are dry. I constantly have dry mouth even though I drink 2 to 4 liters of water a day.

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