The diagnostic test, when used, is similar to that used to diagnose lactose intolerance. It is called a hydrogen breath test and is the method currently used for a clinical diagnosis. Nevertheless, some authors argue this test is not an appropriate diagnostic tool, because a negative result does not exclude a positive response to<unk>  restriction, implying a lack of sensitivity.
Fructose malabsorption
Glucose-galactose malabsorption
Sucrose intolerance
Lactose intolerance
Bile acid malabsorption
Exocrine pancreatic insufficiency
Lysinuric protein intolerance
Small intestinal bacterial overgrowth