> you can actually listen to your body and know minute by minute if you're in danger or not
Friend, this is all hocus pocus bogus from a crackpot doctor. Other sources even say dry fasting is rarely done today (because it's hocus pocus), even if it was once popular in the Soviet Union.
You will also notice how this crackpot doctor charges $2,200 for a supervised 2 day dry fast - not 10!
Please don't go 10 days without liquid intake - especially when you are without medial supervision for crying out loud. You cannot monitor yourself properly under these extreme conditions. Even if you survive 10 days without any liquid intake, you may (and probably will) cause irreversible damage to your body and organs.