Coffee gives people a boost in energy, but it might also boost their bowel movements. Although there hasn’t been much research on the subject, a study from Gut, a journal of gastroenterology, shows that 30 percent of people have to run to the bathroom after drinking coffee. And how many of those people are making these 12 coffee brewing mistakes? Plus, with the average American drinking almost three cups of coffee per day, that means there’s a lot of people hopping on the toilet post-java—but why does coffee make you poop is a loaded question.
Why does coffee make you poop?
Coffee naturally contains hundreds of chemicals, so the answer to why does coffee make you poop is a little bit complicated, according to Kris Sollid, RD, the senior director of nutrition communications at the International Food and Information Council Foundation. People say the amount of caffeine in coffee could be one reason for an urge to poop after drinking a cup of java because it activates stomach muscles and the colon. “Hot beverages, in general, may also tend to have this effect, so a hot caffeinated beverage might be a double whammy,” says Monica Reinagel, MS, LDN, from NutritionOverEasy.com. Even though caffeine stimulates gut activity, it’s probably one of many reasons why coffee makes you poop, Sollid says. Plus, drinking multiple cups a day makes this effect worse, and it’s one of the 7 signs you’re drinking too much coffee.
There’s a possibility that acidity plays a part in why coffee makes you poop, too. Coffee contains chlorogenic acid and promotes the production of gastric acid in the body, according to Sollid. Both acids lower the pH of the stomach and speed up the movement of food from the stomach to our intestines, forcing the stomach to push out its contents faster than usual. Coffee also increases the production of hormones like gastrin and cholecystokinin that enhance the ability to digest food and activate the colon—which keeps things moving, Sollid says. Decaf coffee has a similar effect because it too impacts both gastric acid and gastrin, so the urge to go isn’t because of caffeine alone.
How to prevent the need to go?
Some research suggests regularly consuming coffee diminishes the effect. A study published by the Journal of Human Nutrition and Dietetics found that a tolerance for the diuretic properties of coffee develops when habitually consumed. Reinagel couldn’t speak on the validity of the research, but she explains that people who regularly consume caffeine do develop a tolerance to its effects. “Coffee does not actually have any diuretic effect in regular coffee drinkers, for them, drinking coffee is equivalent to drinking plain water in terms of hydration,” says Reinagel.
And while the laxative effects of coffee occur with or without cream, dairy, and non-dairy milk, if you’re sensitive to dairy, adding them into your morning cup of joe definitely isn’t helping your stomach. So try drinking it black or with non-dairy creamer. If you want to take a walk on the wild side, try adding these 10 unexpected things to your daily cup of coffee.
So, why does coffee make you poop? Unfortunately, there’s really no definitive answer to this coffee-pooping conundrum; the only solution is to know your body and brew yourself that cup of coffee at your own risk. Sollid also recommends discussing how coffee makes you poop with a specialist to check for possible underlying health issues. It is still possible to enjoy your morning cup of joe and be kind to your body, too, especially with these 11 ways to make your coffee habit healthier.