I fast once a week to be healthy and improve performance. It is intermittent fasting (I restrict eating to a four hour window).
I have insomnia almost every time and a quick google search shows multiple forums with the same issue — but no resolution. I almost never have insomnia when I don't fast.
Is it ok to have insomnia, or is something else (eg. hormones out of whack) causing me to have insomnia when I fast?