(ABC News) -- Food can save your life. That's no exaggeration. But if you're saying "yes" to the wrong diet—one crammed with sugar, industrial fat, salt, excess meat, and refined flour—you could be headed for a health disaster. Put the right foods on your plate, though, and you're making a choice that could ward off weight gain, diabetes, heart disease, and even cancer. We turned to integrative medicine expert Tasneem Bhatia, MD, author of What Doctors Eat, to see which foods the nation's top docs pile on their plates.