Some of you folks out there know first hand that a cup of coffee almost immediately means a trip to the bathroom. But what’s inside a cup of coffee that makes you have to go to the bathroom.
We’ve all been told that coffee — specifically, the caffeine in coffee — is a mild diuretic, which means that it makes the body excrete more liquid than normal,but caffeine can also have a laxative effect in some particularly sensitive people.
Something in coffee may also trigger the release of hormones that aid digestion, which would speed up bowel movements.
One study, published in 1990 in Gut, a journal of gastroenterology, found that coffee induces a “gastrocolonic response” in some individuals just minutes after they consume the beverage.
Frequent coffee drinkers who don’t feel the need to poop after drinking a cup have likely built up a tolerance.