Funny how things work

Why is it that the people I know who seem to try to "eat healthy" always feel like crap all the time? Maybe it's just that I can't eat fruits and vegetables all the time without being hospitalized (it's true), but every single person I know who's all "I will change my diet and eat organic foods and feel great!" are the ones who are constantly changing to a new diet because each one is so awful.

Eat like a normal human being. Wanna cut out some fast food? Fine. But eating a french fry or two every now and then won't kill you.