Just because something is low in fat does not mean it's low in anything else. For example, a SnackPack fat-free chocolate pudding has 90 calories, with 13 grams of sugar as compared to the regular version with 14 grams of sugar and 120 calories. That's a not a big difference. In fact, many low-fat and fat-free foods are more processed with higher in calories, sugar and sodium counts than the “normal” versions. “Plus, fats are essential nutrients and play a role in satiety -- that feeling of fullness,” says author and president of Welltech Solutions Dina Aronson, R.D. So read labels: Food manufacturers add sugars, carbs and sodium to compensate for the lack of fat.