Scientists Discover We Fart Twice As Much As Previously Thought — Thanks To “Smart Underwear”
By Daniel Brooks • Health & Science
It might not be the most glamorous subject in science, but researchers have just uncovered surprising new data about one of the body’s most natural functions.
According to a recent study, humans may actually pass gas twice as often as scientists previously believed. The discovery was made possible by an unusual new wearable device — commonly referred to as “smart underwear.”
The experimental technology allows researchers to track intestinal gas production in real time, revealing that the average person releases gas far more frequently than earlier estimates suggested.
While the findings may sound humorous, scientists say the research could provide valuable insights into gut health, digestion and the human microbiome.
The Technology Behind “Smart Underwear”
The device at the center of the research is a small wearable sensor that clips onto underwear and measures gas released by the digestive system.
Developed by scientists at the University of Maryland, the device uses electrochemical sensors to detect hydrogen levels in intestinal gas. Hydrogen is one of the main gases produced by gut bacteria when they break down food in the digestive system.
Unlike previous research methods — which often relied on self-reporting or brief medical tests — the device allows for continuous, non-invasive monitoring throughout the day.
Researchers say this provides a far more accurate picture of how frequently people pass gas and what factors may influence it.
The Surprising Results
When volunteers wore the smart underwear sensors during the study, scientists discovered something unexpected.
Participants were passing gas an average of 32 times per day, significantly higher than the long-accepted estimate of around 14 times daily.
The results also showed a huge range between individuals.
Some participants released gas as few as four times per day, while others did so up to 59 times daily.
Scientists say this variation highlights how different people’s digestive systems can be depending on diet, gut bacteria and lifestyle factors.
Why Previous Estimates Were Wrong
For decades, medical researchers struggled to measure flatulence accurately.
Most previous studies relied on patients recording how often they believed they passed gas — something scientists now say is unreliable.
People often forget, underestimate or simply avoid reporting something as socially awkward as farting.
Older medical techniques also involved uncomfortable testing procedures that only captured data for short periods of time, making it difficult to understand long-term patterns.
The new wearable technology removes many of those limitations by monitoring gas production throughout normal daily activities.
What Farts Reveal About Gut Health
Although the topic often gets laughs, flatulence can actually provide valuable information about the health of the digestive system.
Most intestinal gas is produced when bacteria in the gut break down carbohydrates and fiber that the body cannot fully digest.
This fermentation process creates gases such as hydrogen, methane and carbon dioxide.
By measuring these gases, scientists can learn more about how the gut microbiome — the community of trillions of microorganisms living in the digestive tract — functions.
Researchers say understanding these patterns could help doctors diagnose certain gastrointestinal conditions or identify dietary issues affecting digestion.
The “Human Flatus Atlas” Project
To expand their research, scientists have launched a new initiative known as the Human Flatus Atlas.
The project aims to collect data from hundreds of volunteers using the smart underwear sensors to better understand patterns of gas production in different populations.
Participants are grouped based on factors such as:
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Diet
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Microbiome composition
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Lifestyle habits
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Overall health
By analyzing this information, researchers hope to determine what level of gas production should be considered “normal” — something that surprisingly remains unclear in modern medicine.
Why Understanding Flatulence Matters
While it may seem like a trivial topic, researchers say flatulence can reveal a lot about digestive health.
Excess gas can sometimes indicate issues such as:
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Food intolerances
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Gut bacteria imbalances
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Digestive disorders
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Problems with carbohydrate absorption
By establishing a clearer baseline for what is considered normal, doctors may be able to better identify when gas production signals an underlying health problem.
Scientists compare this goal to the way medicine has established healthy ranges for other indicators such as cholesterol levels or blood pressure.
Not Available to the Public Yet
Despite the buzz surrounding the technology, the smart underwear device is still in development and not yet available for consumers.
Researchers say their main goal at this stage is collecting scientific data rather than creating a commercial product.
However, the concept reflects a broader trend in wearable health technology — devices designed to monitor various aspects of the body continuously.
Just as smartwatches now track heart rate and sleep patterns, future wearable devices may eventually monitor digestive health as well.
Key Findings From The Study
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Researchers created wearable “smart underwear” that measures intestinal gas.
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Sensors track hydrogen produced by gut bacteria during digestion.
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The study found people pass gas about 32 times per day on average.
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Previous estimates suggested only around 14 daily episodes.
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Scientists say the technology could improve understanding of gut health and digestive disorders.