I can only offer my own experience.
Several fasting experiences from few years ago, all about 3 days in a duration. Drinking only purified water throughout which made it basically a starving. I remember feeling light headed at times, and of course pangs of hunger. My cognitive abilities were unaffected, energy levels were good enough for light workouts. But my sleep both length and quality was affected and went down the hill.
With fasting regimen, the difference is light and a day.
Eat your full inside the 8 hour window. No bad effects, really nice sleep, brain fires up fast and strong, and I am able to do all hard work around the farm + daily job without a hitch.
Literally no comparison and one of the best decisions in my life.
Several fasting experiences from few years ago, all about 3 days in a duration. Drinking only purified water throughout which made it basically a starving. I remember feeling light headed at times, and of course pangs of hunger. My cognitive abilities were unaffected, energy levels were good enough for light workouts. But my sleep both length and quality was affected and went down the hill.
With fasting regimen, the difference is light and a day.
Eat your full inside the 8 hour window. No bad effects, really nice sleep, brain fires up fast and strong, and I am able to do all hard work around the farm + daily job without a hitch.
Literally no comparison and one of the best decisions in my life.