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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.
In a small study, the researchers analyzed the sweetener sucralose (SplendaÂ®) in 17 severely obese people who do not have diabetes and donât use artificial sweeteners regularly.