Mary Roach Quote

…he was doing a breath hydrogen test. If you know the amount of hydrogen someone is exhaling orally, it's a simple matter to extrapolate the amount they're exhaling rectally. This is because a fixed percentage of hydrogen produced in the colon is absorbed into the blood and, and when it reaches the lungs, exhaled. The breath hydrogen test has given flatus researchers a simple, consistent measure of gas production that does not require the subject to fart into a balloon.

Mary Roach

…he was doing a breath hydrogen test. If you know the amount of hydrogen someone is exhaling orally, it's a simple matter to extrapolate the amount they're exhaling rectally. This is because a fixed percentage of hydrogen produced in the colon is absorbed into the blood and, and when it reaches the lungs, exhaled. The breath hydrogen test has given flatus researchers a simple, consistent measure of gas production that does not require the subject to fart into a balloon.

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About Mary Roach

Mary Roach (born March 20, 1959) is an American author specializing in popular science and humor. She has published seven New York Times bestsellers: Stiff: The Curious Lives of Human Cadavers (2003), Spook: Science Tackles the Afterlife (2005), Bonk: The Curious Coupling of Science and Sex (2008), Packing for Mars: The Curious Science of Life in the Void (2010), Gulp: Adventures on the Alimentary Canal (2013), Grunt: The Curious Science of Humans at War (2016), and Fuzz: When Nature Breaks the Law (2021).