Lactose IntoleranceLactoseLactose Tolerance TestLactaseFlatulenceDietary CarbohydratesDairy ProductsBreath TestsLactase-Phlorizin HydrolaseHydrogenMilkKwashiorkorCalcium, DietaryAbdominal PainMalabsorption SyndromesNational Institute of Mental Health (U.S.)Glucose IntoleranceDigestive SystemIntestine, SmallDiarrheaDietary FatsIrritable Bowel SyndromeDigestive System Neoplasmsbeta-GalactosidaseFructose IntoleranceFecesDietDigestive System DiseasesDietary Proteins