A while ago my wife and I decided to slowly, where we could, get away from any processed foods. We've done pretty well, but there are days where the kids want chicken nuggets...
After moving away from processed food, I cut my food intake by 2/3, but still ate real butter, real ice cream, and whole milk. I've lost 60 lbs, or about 30% of my original body weight. It's amazing, the American diet. I hope science prevails soon and the "rules" change quickly.