title: Lactose intolerance: diagnosis, genetic, and clinical factors.
abstract: Most people are born with the ability to digest lactose, the major carbohydrate in milk and the main source of nutrition until weaning. Approximately 75% of the world's population loses this ability at some point, while others can digest lactose into adulthood. This review discusses the lactase-persistence alleles that have arisen in different populations around the world, diagnosis of lactose intolerance, and its symptomatology and management.
authors: Department of Gastroenterology, University of São Paulo School of Medicine, São Paulo, Brazil.
authors: Rejane
authors: R
authors: Mattar
authors: Daniel Ferraz
authors: DF
authors: de Campos Mazo
authors: Flair José
authors: FJ
authors: Carrilho