Coffee review

Why do you want to take a shit after drinking coffee? Ha, so I'm not alone!

Published: 2025-08-21 Author: World Gafei
Last Updated: 2025/08/21, Professional coffee knowledge exchange more coffee bean information Please follow the coffee workshop (official Wechat account cafe_style) after getting up in the morning, have a cup of coffee, after a while I want to take a shit. 3 out of 10 people want to defecate after drinking coffee, why? Scientists have not yet made a summary explanation of why, but there is a lot about how coffee causes defecation.

Professional coffee knowledge exchange More coffee bean information Please pay attention to coffee workshop (Weixin Official Accounts cafe_style)

After getting up in the morning, drink a cup of coffee, after a while want to shit... Three out of 10 people want to defecate after drinking coffee. Why? Scientists haven't yet come up with a conclusive explanation for why, but there is plenty of research into how coffee causes bowel movements:

Caffeine is not to blame.

You might think it must be caffeine, because coffee is coffee because it contains caffeine. But that is not the case. Carbonated drinks or energy drinks may also contain caffeine, but they don't make people want to go to the bathroom.

Decaf coffee has been found to have a similar effect. A cup of hot caffeinated coffee has the same effect of stimulating intestinal motility as a 1000-calorie meal. 60% stronger than hot water and 23% stronger than decaf coffee. So decaf coffee has a similar effect, but less pronounced.

A study of coffee and defecation recruited 99 healthy volunteers, 28 of whom wanted to defecate after drinking coffee. This sample is small but significant. Also, they felt shit 4 minutes after drinking coffee. In this short period of time, coffee does not quickly pass through the intestine or blood to reach the colon, that is, coffee is indirectly triggered by defecation.

What's causing the shit?

The study suggests two principles. The first theory is that stomach acid is the culprit: coffee contains gastrin, a peptide hormone that promotes stomach acid secretion; stomach acid sends signals to receptors in the stomach epithelium to speed up gastric emptying.

Foreign studies point out that hot coffee helps defecation, which is stronger than drinking more water.

Constipation is a gastrointestinal problem that many people often encounter. Most people will drink more water and eat more fiber to improve their condition. However, foreign medical experts have pointed out that the effect of drinking hot coffee is stronger than drinking water, which can promote gastrointestinal motility and solve constipation problems.

According to Dr. Michael Ruscio, chief physician of the Center for Digestive Health at the University of Oxford, hot drinks stimulate the digestive system, activate intestinal motility, and cause large intestine muscles to push feces toward the rectum, so any hot drink that contains hot water will help solve defecation.

However, the latest research in Lao Ou found that among all hot drinks, coffee causes intestinal peristalsis, which is 60% stronger than hot water and 23% stronger than decaffeinated coffee. According to statistics, most people drink hot coffee and feel it within 20 minutes, becoming one of the good things to solve constipation.

According to a previous report in Health Magazine, drinking coffee can cause diarrhea, mainly due to an "unknown ingredient" in coffee that promotes the secretion of gastrin in the stomach and accelerates sigmoid motility.

But there are also doctors remind, although drinking coffee to stimulate the effect of defecation is similar to taking laxatives, but constipation family can not be too happy too early, long-term by drinking coffee laxative, easy to let intestinal gradually paralyzed, lose the ability to move on its own, eventually evolved into a situation of constipation without drinking coffee, so people can not use coffee to help defecation for a long time.

How did it go?

Coffee is caused by intestinal peristalsis. "If you're lucky 30 percent of the time, your terminal colon will be stimulated when you drink coffee, and your muscles will contract in waves, making you want to go to the bathroom all the time."

Space-time atlas of esophageal peristaltic wave after drinking water

So the first set of experiments we did, intestinal motility is critical in digestion. Smooth muscle tissue in the stomach and intestines contracts one after another, forcing food to move. But sometimes, even if there is no food in the stomach, the stomach will be "cheated" and begin to contract. Coffee triggers defecation as a reflex of the stomach and colon. The gastrocolic reflex is the signal your stomach sends to your colon to make room when you wake up in the morning.

summary

30% of people want to poop after drinking coffee. If you're one of the lucky ones, coffee boosts the secretion of stomach acid, kephalins, and other substances in your body, causing your colon to contract. Some people become immune to it.

Coffee is the second most precious commodity after oil and is a daily necessity for millions of people. It would be nice to know exactly why it causes shit.

Coffee helps defecate, and it's stronger than drinking plenty of water.

I didn't expect coffee and these little things

There's so much going on in my stomach every day.

Knowing this,

Do you feel like you've gained a lot more,

To know more about your body,

Every morning after a cup of black coffee, there will be shit in 20 minutes, all rely on black coffee to cure constipation

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