"I would eat fast foods, McDonalds, Wendy's, but it helped me gain weight. After I ate a couple of meals, I would treat ...

Laura Rosenthal's weight eventually triggered an old ankle injury ... Laura Rosenthal’s metabolism allowed her to indulge in her fast food habit without gaining weight.

But on this fast food plan, my calories plummeted. Most of these meals came in under 400 calories, and that was one of my first problems. I'd eat and just a couple hours later, I was starving.