Lactose IntoleranceLactaseLactose Tolerance TestLactoseFlatulenceDairy ProductsBreath TestsLactase-Phlorizin HydrolaseMilkHydrogenKwashiorkorLactose SynthaseMalabsorption SyndromesAbdominal PainCalcium, DietaryNational Institute of Mental Health (U.S.)Glucose IntoleranceIntestine, SmallDiarrheaLactose FactorsIrritable Bowel SyndromeThiogalactosidesFructose IntoleranceSymportersbeta-GalactosidaseNitrophenylgalactosidesFeces