Coffee and disorders of the large intestine

Print this page

Intestinal peristalsis

Peristalsis is the process of muscular contraction in the intestines, which encourages the movement of food along the intestine. Coffee can stimulate peristalsis in some individuals.

  • A study of 99 individuals suggested that coffee stimulated intestinal movement in 29% of people21.
  • Research comparing the effect of regular and decaffeinated coffee on intestinal motility with the same amount of hot water or a full meal of 1,000 calories showed that the effect of caffeinated coffee was as substantial as the meal, 60% stronger than water and 23% stronger than decaffeinated coffee22.
  • Further work has suggested that strong coffee and hot water both have a significant effect on bowel movement23.

There is no indication that coffee causes diarrhoea in healthy adults and it is not possible to draw conclusions about a role for coffee consumption in constipation, since this will depend on the cause and severity of the constipation.

Irritable Bowel Syndrome

Irritable Bowel Syndrome (IBS) is described as a chronic disturbance of the intestine, but the cause is often difficult to specify. The symptoms that patients describe include abnormal bowel motions, stomach pain and bloating; complaints that may also be experienced by those who do not suffer IBS.

  • A screening exercise as part of research in the Netherlands suggested that there was no association between IBS and coffee consumption1.
  • Further research from Sweden found that 63% of IBS sufferers assumed that their symptoms were related to meals, especially foods rich in carbohydrates and fat24. In this group coffee was associated with serious complaints such as dyspepsia and stomach pain by 10% of patients.

Colorectal Cancer

In 2016 the International Agency for Research on Cancer (IARC) found inadequate evidence to suggest any link between coffee consumption and colorectal cancer18.

  • Four large literature reviews show no association between coffee consumption and colorectal cancer and in fact may suggest a potential favourable effect of moderate coffee consumption on colorectal cancer risk25-28.

Further detailed information is available in the Cancer section of the Coffee and Health website here.

Other intestinal disorders

There are many other disorders of the intestine that have a variety of causes, including diverticulitis and Inflammatory Bowel Disease, of which the two main conditions are Crohn’s Disease and ulcerative colitis. There is no indication that coffee influences the course of these disorders.

This information is intended for Healthcare professional audiences.
Please consider the environment before printing.