Lactose intolerance in Iran.
One hundred five Iranian subjects, ranging in age from 4 months to 25 years, were tested for lactose absorption and tolerance. After ingesting a lactose dose, on the basis of low blood glucose response, 68% of the subjects were malabsorbers. Prevalence of lactose malabsorption increased with age, i.e., 31% of the children less than 3 years of age malabsorbed lactose, whereas 86% of adults did so. Clinical manifestations of lactose intolerance were shown by 39% of all subjects; of those who were lactose malabsorbers, only 57% manifested clinical symptoms. Among the lactose malabsorbers, the lowest prevalence of clinical symptoms occurred among the children less than 3 years of age and the highest in adults.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D001786:Blood Glucose / Q000032:analysis; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007492:Iran; D007785:Lactose / Q000378:metabolism; D007787:Lactose Intolerance / Q000097:blood / Q000453:epidemiology*; D008297:Male; D044469:Racial Groups
D001786:Blood Glucose; D007785:Lactose