Intermittent Fasting?

I'm trying out intermittent fasting. Why? I have been feeling tired here and there, maybe not having the clarity of thought I would like to have, and not wanting to rely on coffee, I thought it might be time to start improving my health.

It seems that you don't eat during certain parts of the day, in my case I chose morning and night for that. Coffee is allowed, but what coffee to choose?

The experience is not easy, though not as difficult as you might imagine. Let's see if this turns out to be the solution for my current health status.