RT Journal Article SR Electronic T1 Use and abuse of hydrogen breath tests JF Gut JO Gut FD BMJ Publishing Group Ltd and British Society of Gastroenterology SP 297 OP 303 DO 10.1136/gut.2005.075127 VO 55 IS 3 A1 M Simrén A1 P-O Stotzer YR 2006 UL http://gut.bmj.com/content/55/3/297.1.abstract AB Hydrogen breath tests are widely used to explore the pathophysiology of functional gastrointestinal disorders. Small intestinal bacterial overgrowth and carbohydrate malabsorption are disorders detected by these tests that have been proposed to be of great importance for symptoms in, for instance, irritable bowel syndrome. However, conclusions drawn from these studies are highly controversial and divergent results exist. There is also an extensive use of these tests in clinical practice with difficulties regarding interpretation of the tests and sometimes erroneous conclusions. The limitations and pitfalls of these tests will be reviewed in this article, and hopefully the occasional abuse of these tests can be turned into proper clinical and scientific use instead in the future.