Clarke and Jarosh explain that to make the "light" versions of bread and English muffins, the recipes are stripped down to white flour. Then vitamins, fiber and even sweetness (in the form of artificial sugars) have to be added in. They say that you're better off going with regular whole grain breads because those extra calories (30 or so) pack in natural flavor, nutrients and fiber. That's real food, with real benefits, compared with slices that have sweeteners you don't need and may leave you hungry and looking for something to eat later (and that something will likely have more than 30 calories).
Next: Diet advice you can ignore