Disaccharidase deficiency.
D000293:Adolescent; D000328:Adult; D000818:Animals; D002648:Child; D002664:Child Nutritional Physiological Phenomena; D004032:Diet; D004035:Diet Therapy; D005006:Ethnicity; D005523:Food Supply; D005696:Galactosidases / Q000378:metabolism*; D006801:Humans; D007421:Intestine, Small / Q000201:enzymology; D007785:Lactose / Q000378:metabolism; D007787:Lactose Intolerance / Q000201:enzymology / Q000453:epidemiology / Q000378:metabolism / Q000628:therapy; D008892:Milk / Q000009:adverse effects / Q000378:metabolism; D009747:Nutritional Physiological Phenomena; D012572:School Health Services
D005696:Galactosidases; D007785:Lactose