How has it affected you? Are you doing it for weight loss, or for other reasons?

I had a month off work recently (unrelated to the pandemic), which I spent learning programming. During this time I never ate lunch, only a small breakfast and a normal supper. But now that I'm back at work and I'm on my feet all day, I have to eat, otherwise I get super hungry, lightheaded and generally lethargic. But I've discovered that I don't have to eat very much before I'm back to normal.