Real Good Blog.

Why Does Coffee Make You Poop?

Jul 24, 2023

Why Does Coffee Make You Poop?


As coffee enthusiasts, many of us have experienced the undeniable urge to visit the restroom shortly after enjoying our morning cup of joe. But have you ever wondered why coffee seems to have this unique effect on our digestive system? In this ultimate guide, we'll delve into the science behind why coffee makes you poop, exploring the various factors that contribute to this gastrointestinal phenomenon.

The Magic of Coffee on the Bowels

Coffee's ability to stimulate bowel movements is primarily attributed to its active ingredients and the interactions they have with our bodies. Here are some key factors that contribute to this fascinating phenomenon:

  1. Caffeine: The Stimulant

Caffeine is the primary psychoactive substance in coffee, and it acts as a central nervous system stimulant. When consumed, caffeine triggers the release of certain hormones, such as adrenaline and norepinephrine. These hormones can increase muscle contractions in the digestive tract, leading to faster movement of stool through the intestines. As a result, bowel motility is enhanced, and you may feel the urge to use the restroom.


  1. Gastrocolic Reflex: The Trigger

The gastrocolic reflex is a natural response of the colon to food entering the stomach. When you eat or drink – including consuming coffee – your stomach stretches, signaling the colon to contract and move waste along the digestive tract. This reflex can be more pronounced after consuming coffee, especially in individuals who are more sensitive to its effects.

  1. Acidity and Bitterness: The Culprits

Coffee is naturally acidic and contains certain compounds that can irritate the stomach lining. The acidity and bitterness in coffee can stimulate the production of stomach acid, which, in turn, may promote bowel movements. Additionally, coffee can increase the production of bile, a digestive fluid that helps break down fats, further contributing to the stimulating effects on the digestive system.

  1. The Colon's Response

The colon plays a significant role in the digestive process, absorbing water and nutrients from food as it moves through the intestine. Coffee's laxative effect may result from increased fluid intake, as it can lead to temporary water retention in the colon. The presence of caffeine and certain compounds in coffee may also contribute to muscle contractions in the colon, promoting bowel movements.

Individual Variations

It's essential to recognize that not everyone experiences the same effects from coffee consumption. People vary in their sensitivity to caffeine and coffee's other compounds, so the urge to poop after drinking coffee can differ from person to person. Additionally, factors like tolerance to caffeine, overall health, and diet may also influence how coffee affects bowel movements.


The mystery of why coffee makes you poop lies in its active ingredients and their interactions with our bodies. Caffeine, acidity, bitterness, and the gastrocolic reflex all play essential roles in stimulating bowel movements after coffee consumption. While this effect is entirely normal and harmless for most people, it's essential to be mindful of individual tolerances and moderate coffee consumption, especially if you experience discomfort or other digestive issues.

Ultimately, understanding the science behind why coffee makes you poop sheds light on the fascinating ways our bodies respond to the beverages we enjoy. So, the next time you savor your morning cup of coffee and feel the call of nature, you'll have a better appreciation for the intriguing relationship between coffee and your digestive system.


Want to take a break from reading?  Check out this YouTube video we've made!