I fast for five to seven days a year plus intermittent fasting. In my experience it causes something close to a high. Elevated energy levels. A long fast allows

I fast for five to seven days a year plus intermittent fasting. In my experience it causes something close to a high. Elevated energy levels. A long fast allows you to change your guts flora which has a lasting effect on me. YMMV but n.b most cultures and religions include yearly fasting, and the is a lot of medical evidence that it's a good thing. Try not repeating it to yourself.