I, personally, do best when I eat a limited amount of meat. Too much makes me sick to my stomach, too little worsens my insomnia and I feel weak and tired and anemic. My dad's been a vegetarian for something like 40 years, for moral reasons, and I know a lot of people who don't eat meat for moral (animals shouldn't suffer!) or religious (my religion forbids it, it has nothing to do with animal suffering!) reasons. If that's why you're cutting out meat, then hooray! Assuming you're being sensible about it and not just, you know, eating peanut butter and cheese and giving veggies the side eye. (Fritos! They are Vegan! Om nom nom.) But that's different from cutting out meat because meat is "bad."

The carb thing, the "white foods" thing, the no-grain-ever thing, the "sugar is inherently evil" thing, whatever. A lot of them feel like nothing more than get-thin-quick diet fads suddenly touted as healthy, healthFUL eating. Which they aren't.