MishInAZ - Hate to tell ya, but the sugar free an dthe Low carb are the same dang thing in different packaging. They both cintain sugar alcohols, which is what causes the laxative effect. Read the article about sugar alcohols, I think it's under "The truth about low carb sweetners" link to the side. It can help you learn how to recognize SA's

Some people have no effect at all form them. Others are only sensative to certain ones. So while one candy may make you stall or have gas pains, another won't. Remember though over endulgance in any candy, even LC will effect your weight loss.