Many people gravitate toward artificial sweeteners because they have no calories. But calories aren't everything, and sweeteners like xylitol and sorbitol take a long time for the small intestine to digest, which is why substances like these can lead to bloating.The five artificial sweeteners that the FDA has approved - and therefore some of the most common - are: saccharin, acesulfame, aspartame, neotame, and sucralose.