Lactose IntoleranceLactose Tolerance TestLactaseFlatulenceDairy ProductsLactoseBreath TestsLactase-Phlorizin HydrolaseHydrogenMilkKwashiorkorAbdominal PainCalcium, DietaryMalabsorption SyndromesNational Institute of Mental Health (U.S.)Glucose IntoleranceDiarrheaIrritable Bowel SyndromeIntestine, SmallDairyingFructose Intolerancebeta-GalactosidaseFecesOrthostatic IntoleranceLactose Synthase