Doesn't mean what you say is wrong, but it might be a myth.
Try it and see what works for you.
When I don't eat at night, I wake up with more energy and a very clear head.
But that might just be me.
Also your stomach RESETS with fast. Like Hillary’s Big Red Reset button. Regular eating, your stomach gets used to stuffing it with junk food.
Blood pressure drops to ideal after a 2 day water fast. Try it.
Then the stomach resets.
My kid lost 140 lb. Fasting caused a weitgh gain.