You won't sleep great the first few days.
My longest water fast was 41 days. I was in my early twenties.
It had to be done.
It saved my life.
About 2018 I did a 21 day one.
I need to get back on the saddle. It's been hard to even try a shorty because I'm under a lot of many different kinds of stressors currently.
On a 5 day fast, you'll feel like you can go on and on cuz you'll feel a lot of energy and clarity. But dizziness can be an issue at times, so keep up those minerals & salts!!!