Flatulence is something that almost everyone experiences, yet very few people like talking about it. Many people laugh about farting, feel embarrassed when it happens in public, or try to avoid discussing it altogether.
Despite its awkward reputation, farting is actually a normal and important part of healthy digestion. Without it, gas would build up inside the digestive system, causing discomfort, bloating, and pain.
Every day, the digestive system produces gases as food is broken down. Some of this gas comes from air that people swallow while eating, drinking, chewing gum, or talking.
Another large portion comes from the trillions of bacteria living in the intestines. These bacteria help digest food that the body cannot fully break down on its own. During this process, gases are produced as natural byproducts.
Most of these gases are harmless. In fact, many are odorless. However, certain gases that contain sulfur compounds can create the unpleasant smell often associated with flatulence. The type of food people eat can influence both how often they pass gas and how strong the odor may be.
Although farting is completely normal, scientists have never had a clear answer to a simple question: how often should a healthy person fart? Previous studies were usually small or focused mainly on people with digestive disorders. As a result, doctors lacked reliable information about what is normal in the general population.
To address this gap, researchers from Australia’s Commonwealth Scientific and Industrial Research Organisation, known as CSIRO, conducted an unusual but important study. They developed a smartphone application called Chart Your Fart and invited Australians to record their flatulence habits in real time.
The study included more than 6,400 participants, making it one of the largest investigations of flatulence ever conducted. Participants were required to be at least 14 years old and not undergoing major dietary changes. Once enrolled, they recorded every episode of passing gas for at least three days using the app.
The results provided valuable insights into everyday digestive health. On average, participants reported passing gas about five times per day. Men reported slightly more episodes than women, averaging 5.2 times daily compared with 4.8 times for women.
The researchers also discovered that farting patterns changed throughout the day. The number of recorded episodes remained relatively low during the middle of the day but increased noticeably during the evening. The highest levels occurred between 6 p.m. and 10 p.m.
This pattern may be linked to eating habits. Many people consume their largest meals during the evening hours. Larger meals often contain more calories and fiber, both of which can increase bacterial activity in the gut and lead to greater gas production.
The study found that nearly 80 percent of participants fell within a range of two to seven episodes per day. This suggests that there is a fairly wide range of what may be considered normal.
Interestingly, younger participants aged 14 to 25 reported passing gas less often than older age groups. The reasons for this difference are not entirely clear. It may reflect differences in diet, metabolism, digestive function, or reporting habits.
The findings also highlight the important role of fiber. Foods rich in fiber often increase gas production because gut bacteria ferment fiber as part of the digestive process. While this may sometimes be inconvenient, it is often a sign that beneficial bacteria are actively working inside the digestive system.
The study also reminds people that both too much and too little gas can sometimes signal health problems. Excessive gas may be associated with digestive disorders such as irritable bowel syndrome.
On the other hand, a sudden inability to pass gas, especially when accompanied by abdominal pain or bloating, may indicate a blockage or another serious medical condition requiring prompt attention.
The research was published in JAMA Network Open. One of its major strengths is the large number of participants and the use of real-time recording rather than relying on memory. This likely provided more accurate information than traditional surveys.
However, the study also has limitations. Participants voluntarily recorded their own data, which means some episodes may have been forgotten or underreported. The research was conducted primarily in Australia, so results may not perfectly represent other populations.
Overall, the study provides one of the clearest pictures yet of normal flatulence patterns. It suggests that passing gas around five times per day is common and that most healthy people fall within a range of two to seven times daily.
Perhaps most importantly, the research helps normalize a bodily function that is often misunderstood. Understanding what is normal may help doctors identify digestive problems earlier and may encourage more open conversations about gut health.
Review and analysis: The study offers valuable baseline information because it examined a large population and collected data in real time. While self-reporting remains a limitation, the findings help establish a practical reference range for normal flatulence.
Future studies could examine diet, medical conditions, and gut bacteria in greater detail to better understand why individuals vary so much. The research supports the idea that farting is a normal sign of digestive activity and should not automatically be viewed as a health problem.
If you care about gut health, please read studies about how junk food harms your gut health, and how probiotics can protect gut health.
For more information about health, please see recent studies about how fiber affects weight loss and your overall health, and results showing why a glass of red wine is good for your gut.
Source: Commonwealth Scientific and Industrial Research Organisation (CSIRO).
