Thank you very much for the reply, DesertLili. That is helpful.
Question: When you said "increase its duration by 24 hours if the last fast was well tolerated," did you mean that I should go another day if the previous day went well, or that I should go one day, break the fast, and the next time go two days, then break the fast, and the next time go three days?
I have water fasted minimally before, but the last time was probably 4ish years ago for 5 days. (I broke it due to a strong emotional reaction...) Back then I was doing it for spiritual reasons and had no idea about the health benefits.