Researchers at the University of Maryland have created smart underwear that tracks flatulence by detecting hydrogen in intestinal gas. The device snaps onto regular underwear and continuously monitors gut gas production without the discomfort of previous methods like rectal tubes or the unreliability of people just reporting when they fart. A study of 60 healthy participants showed the underwear could be worn comfortably for over 11 hours daily, with 19 people wearing it for a full week during normal activities and another 38 using it during controlled diet experiments to see if the device could detect changes in gas production. The findings reveal that healthy adults produce gas about 32 times per day on average—more than double the 14 daily events reported in medical literature. Individual variation was dramatic, ranging from 4 to 59 farts per day. The underwear specifically tracks hydrogen because gut microbes produce it exclusively when fermenting food, giving researchers a direct window into microbial activity rather than just guessing based on symptoms or patient memory. The real value here is establishing a baseline for normal flatulence. Right now, doctors have standard ranges for blood glucose and cholesterol but nothing for gut gas production, making it impossible to know when someone's actually producing excessive amounts. Researchers plan a larger study called the Human Flatus Atlas, tracking hundreds of people across multiple days to correlate gas patterns with diet and microbiome composition. This baseline data could help identify triggers for conditions like irritable bowel syndrome and food intolerance, transforming how doctors approach digestive disorders.