Kelly Killoren Bensimon has done it all when it comes to nutrition and her body: eaten too little as a model, gobbled too much of the wrong things in her twenties, and fed her body just right but not-quite-satisfyingly when she was pregnant. On the eve of turning 40, Kelly knew she had to figure it out fast: how and what to eat to keep her body beautiful. An enthusiastic outdoorswoman and involved mom, Kelly discovered that eating-- really eating...