Why Does Coffee Make You Poop?

Why Does Coffee Make You Poop So Quickly?

Coffee activates the colon and digestive hormones, which stimulate bowel movements. Both caffeinated and decaf coffee can trigger this effect due to compounds that increase gut activity. People sensitive to caffeine or lactose may experience cramps or diarrhoea after drinking it.

Why Does Coffee Make You Poop?

Medically Reviewed

By

Chrysoula I. Liakou

MD, PhD, Internal Medicine Specialist and Cancer Immunology Researcher.

Why Coffee Makes You Poop Explained

Coffee's caffeine content can provide an extra energy boost throughout the day. The drink may also cause people to have a bowel movement as a side effect.

Most Respondents In One Survey Reported That Drinking Coffee Increased The Motility Of The Bowels.

What causes many people to poop after drinking coffee? Is coffee effective at stimulating bowel movements? This article discusses the effects coffee can have on the digestive system and other things you may want to consider before drinking coffee.

The Science Behind Coffee and Digestion

Coffee contains several natural compounds, including:

  • Caffeine: A stimulant found in over 60 plant species, including tea leaves, kola nuts, cocoa, and coffee.
  • Antioxidants: A coffee drink may aid the body in removing oxidants through its chlorogenic acid and melanoidin content.
  • Diterpenes: Coffee oil naturally contains cafestol and kahweol diterpenes.

Caffeine has been specifically found to have several effects on the human gastrointestinal system, despite its compounds having different effects on the body.

How Caffeine Affects the Colon and Bowel Movements

The colon is believed to be affected by caffeine in various ways. According to one study, caffeine is 60% more effective than water at stimulating colonic activity in some people.

Studies have found that caffeine can trigger muscular contractions of the anal sphincter, which are needed for successful bowel movements. The same study also found that decaffeinated coffee stimulated colonic motor activity, suggesting that coffee also contains other components that activate our bowels.


In addition to the compounds listed above, coffee contains many other chemicals, some of which are formed during storage and processing. There is some evidence that coffee affects our gastrointestinal system, although the specific compounds that directly impact it are unknown.

Factors That Influence Coffee’s Effect on Digestion

Besides coffee's impact on our colon and more extensive gastrointestinal system, other factors may affect how we go to the bathroom.

Hormonal Fluctuations

Coffee can affect the body's hormones when consumed.  Consuming coffee increases gastrin levels, for instance. A significant function of Gastrin is to increase gastric motility and control the stomach's acid release.  

Additionally, drinking coffee can increase the speed at which waste moves through the colon by releasing cholecystokinin, a hormone that stimulates digestion.

Milk or Creamer

Those lactose intolerant or sensitive may experience abdominal cramps, bloating, and diarrhoea when they add milk or creamer to their morning coffee.

Temperature

Compared to cold or iced coffee, some people believe drinking hot coffee can help move their bowels. Temperature doesn't significantly impact whether or not bowel movements are triggered.

Acidity

One theory suggests that chlorogenic acid, another antioxidant in coffee, may speed up digestion and colonic activity by helping the stomach digest food more quickly.

More research is needed to support these claims.  

Other Health Conditions

Some health conditions may make coffee more likely to trigger bowel movements, including those with:

  • Irritable bowel syndrome (IBS)
  • Lactose intolerance

Coffee and Digestion: What Affects Your Bowel Movements

Factor Effect on Digestion What to Do
Caffeine Stimulates colon contractions Limit intake to <400mg daily
Milk or creamer Can cause cramps or diarrhoea in lactose intolerance Use lactose-free alternatives
Coffee temperature Minimal impact Choose personal preference
Acidity May speed up digestion in some Try low-acid coffee
IBS or IBD Can worsen bowel urgency Seek doctor’s advice

How Much Coffee It Takes to Stimulate a Bowel Movement

The effects of drinking coffee will vary from person to person.

Individuals who find coffee an effective colonic stimulant will require different amounts of coffee to cause bowel movements.

The type of coffee a person consumes, their general health, and their tolerance for caffeine can all influence the effect of coffee.

Most adults can safely and healthily consume 400 milligrams of caffeine per day. Caffeine, however, can cause unwanted side effects when consumed in excess, such as:

  • Indigestion
  • Jitters
  • Anxiety
  • Nausea
  • Insomni
  • Headache
  • Increased heart rate

Various amounts of caffeine can be found in processed, caffeinated foods (such as candy bars) and beverages (including energy drinks, bottled teas, and coffees).

Please read the nutrition facts carefully before consuming any caffeine-containing products.

How to Reduce Coffee’s Effect on Your Bowels

Once you start drinking coffee, there is no surefire way to stop pooping. Having a meal with your coffee can increase this effect because eating can stimulate gastric and colonic activity.

Try reducing your coffee intake to minimise the effects of caffeine on your digestive system. You may find the right cadence and amount after some trial and error.

Is Coffee Considered a Natural Laxative

The term "laxative" refers to a medicine or treatment that stimulates or facilitates bowel evacuation. The drug usually softens stools or stimulates the lower intestines to help them pass.

Some laxatives are only available with a prescription, while others are sold over the counter (OTC). For some people, coffee can produce similar results to an OTC or prescription laxative.

How Mobi Doctor Can Help with Digestive Issues

Mobi Doctor offers online urgent care. In minutes, you can check your symptoms, research conditions and treatments, and text a healthcare provider if needed.



FAQs About Coffee and Bowel Movements

Coffee triggers digestive hormones and colon contractions, increasing bowel activity. Both regular and decaf coffee can have this effect.

Yes. Caffeine stimulates the colon and releases hormones like gastrin, which help move waste through the intestines.

Yes. Even without caffeine, decaf coffee contains compounds that activate the colon, though effects are milder.

No. Temperature doesn’t significantly affect bowel activity — both can have similar effects.

Reduce your coffee intake, avoid drinking it on an empty stomach, and limit milk or sugar. Opt for smaller amounts or decaf.?

For some, yes. Coffee can act like a mild natural laxative by stimulating the digestive muscles and increasing colon motility.

If coffee causes ongoing diarrhoea, stomach cramps, or bleeding, seek medical advice to rule out digestive conditions like IBS or lactose intolerance.


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