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1 Artificial Sweeteners Artificial sweeteners and sugar alcohols, particularly mannitol and sorbitol, can cause diarrhea in some people. 2  Mannitol and sorbitol linger in the stomach, Schiller says, which can result in bloating and diarrhea.
1 Artificial Sweetener The artificial sweetener perhaps most associated with digestive problems is sorbitol. 2  It is a hard-to-digest sugar found naturally in some fruits, including prunes, apples, and peaches, and is also used to sweeten gum and diet foods.