I have never tried the Carbo-lite ones but on most if they are made with malitol they state that it may have a laxitive effect. It happend to me when my fiance thoughtfully bought me a box of Purdy's no sugar added chocolate truffles. I went a bit nuts not having had any chocolate for so long. I read the back of the box and that is what it said. The Atkins Advange chocolate too I think.