Why Can Zero-Sugar Products Cause Diarrhea?
Why Can Zero-Sugar Products Cause Diarrhea? Many people have heard that zero-sugar snacks or drinks can sometimes cause stomach pain or diarrhea. At the same time, certain laxatives—often sold as syrups or powders— work in a surprisingly similar way. This raises a natural question: Why do zero-sugar products and some constipation medications affect the gut in a similar way? The key mechanism: osmosis Many zero-sugar products contain sugar alcohols , also called polyols . Common examples include sorbitol, xylitol, maltitol, mannitol, and erythritol. These substances are not fully absorbed in the small intestine. When they remain in the gut, they create an osmotic effect —they draw water into the intestinal lumen. In simple terms Unabsorbed substances stay in the intestine → water is pulled in → stool becomes looser → bowel movement...