The net carbs correspond to the amount of carbs left once fiber and sugar alcohols have been subtracted. For example, if your sugar-free candies contain 20 grams of carbohydrates, 0 grams of fiber and 17 grams of sugar alcohol per serving, their net carb content will correspond to 3 grams.
Sugar-free means healthy. Fruits, vegetables, beans and whole grains are examples of healthy foods. Candy doesn’t count as healthy, even if it is sugar-free. If you eat a lot of candy and aren’t ready to cut back, however, switching to sugar-free candy may help you better control your carbohydrate intake.