Can I use low calorie sweeteners?

Low calorie sweeteners are safe for everyone except people with phenylketonuria, who should not use aspartame. Calorie-free sweeteners like aspartame, saccharin, sucralose and acesulfame-K won't increase your blood glucose level. The sugar alcohols -- xylitol, mannitol, and sorbitol -- have some calories and do slightly increase your blood glucose level. Eating too much of any of these can cause gas and diarrhea.