The question, “How often do you poop?” may seem overly personal, yet your response can indicate significant insights into your health.
A 2024 study examined individuals’ bowel movement frequencies alongside their demographic, genetic, and health information.
The participants, totaling 1,425, who identified as the healthiest typically reported having a bowel movement once or twice daily—what researchers referred to as the ‘Goldilocks zone’ of frequency.
Conversely, having too many or too few bowel movements was linked to various health concerns, according to the team from the Institute for Systems Biology (ISB).
“Our findings suggest that the frequency of bowel movements can impact all bodily systems, and abnormal frequencies might be a risk factor for chronic illnesses,” stated Sean Gibbons, a microbiologist at ISB and the report’s primary author.
“These insights could lead to better management strategies for bowel movement frequency even in otherwise healthy individuals to enhance well-being.”
Watch the video below for a brief overview:
The research focused on the bowel habits of participants deemed “generally healthy,” meaning they lacked a history of issues like kidney disease, irritable bowel syndrome, or Crohn’s disease.
Participants self-reported their bowel movement frequency, which the researchers categorized into four groups: constipation (one or two movements per week), low-normal (three to six per week), high-normal (one to three per day), and diarrhea (four or more watery stools daily).
They also analyzed blood chemistry, metabolites, genetic information, and the gut microbes from stool samples.
The researchers looked for connections between bowel movement frequency and various health markers, alongside factors like age and gender.
Overall, individuals reporting less frequent movements were often younger women with lower body mass index (BMI). However, irrespective of these demographics, links between constipation or diarrhea and health concerns were evident.
Stool samples from those with diarrhea showed higher presence of bacteria typically found in the upper gastrointestinal tract. Blood tests, on the other hand, revealed biomarkers indicating potential liver damage.
Samples from those with less frequent bowel movements had increased levels of bacteria connected to protein fermentation, which is a recognized risk associated with constipation.
“When stool remains too long in the gut, beneficial dietary fiber gets consumed entirely by microbes, which then ferment into helpful short-chain fatty acids,” said Johannes Johnson-Martinez, a bioengineer at ISB.
“Eventually, the microbial ecosystem switches towards fermenting proteins, leading to the production of potentially harmful toxins that might enter the bloodstream.”
Some of these byproducts, notably indoxyl-sulfate—a metabolite formed during protein fermentation—were found in the blood of patients, suggesting a possible causal link between bowel movement frequency and overall health.
There’s a bit of optimism that people can adjust their habits and, consequently, improve their health. New research points out that adjustments to your gut microbiome might happen more quickly than you’d expect.
For example, a 2025 German study tracked inactive adults who began resistance training regularly. Those who gained considerable strength exhibited changes in their gut bacteria within just eight weeks.
Such adjustments might help individuals transition out of constipation or diarrhea and into a healthier frequency range.
Participants who fell into the ideal pooping frequency reported consuming more fiber, staying hydrated, and exercising regularly. Their stool samples also indicated high levels of bacteria associated with fiber fermentation.
A clinical trial conducted in 2025 by US researchers revealed that those harboring many methane-producing microbes in their guts were particularly adept at converting dietary fiber into short-chain fatty acids.
This emphasizes that both the fiber intake and the variety of microbes in a person’s gut are crucial, which might explain why two individuals consuming similar diets can yield varying health outcomes.
Of course, everyone experiences fluctuations in bowel habits at times—whether due to illness or something they ate, like too much cheese.
However, this study aimed to illuminate people’s regular habits, highlighting how our version of ‘normal’ might indicate health issues we might not even realize.
The study appears in the journal Cell Reports Medicine.
An earlier version of this article was published in July 2025.
