Carbs get a bad rap. Here's the science behind why eating too much starch isn't good for you — and smart tips to integrate more slow carbs into your diet. Here's what to remember: - Not all calories act the same in the body.- Refined carbs quickly turn to sugar in your body. - Focus instead on refined carbs that take longer to digest, like fruits, beans and whole grains.- If you love breads and muffins, save them for the end of your meal.