0 Net Impact Carbs. For carb conscious dieters. No artificial sweeteners. Doctor's CarbRite Diet Sugar Free Bar is a perfect chocolate bar for those on a low carbohydrate or low sugar diet. With 0 grams of sugars, each serving is packed with lots of nutrition and loads of great chocolate taste. It's just what the doctor ordered. Carb Facts: Total Carbs 3.5g: Maltitol 3.5g = Net Impact Carbs 0g. For Carb Conscious Dieters: This bar contains 0g of carbs (Net Impact Carbs) that should be counted towards your daily carbohydrate intake. Net Impact Carbs include only those carbohydrates that cause a noted impact on blood sugar and exclude maltitol.