Drinking soda affects digestion, including the bacteria that live throughout the digestive system (the gut microbiome). Ingredients in soft drinks affect the gut, including causing symptoms and disrupting the microbiome.

1. You May Have Diarrhea

Regular soda contains sugar, often in the form of high-fructose corn syrup. Fructose pulls more water into the intestines, making stools looser. The extra water may cause diarrhea for people with irritable bowel syndrome (IBS) who are sensitive to fructose.

There's not much good scientific evidence about how artificial sweeteners affect stools. There are personal (anecdotal) accounts of people reporting that artificial sweeteners cause diarrhea.

Caffeine also contributes to diarrhea . It speeds up body systems, including digestion, which c

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