lactose tolerance test

lactose tolerance test

A clinical test for lactase deficiency in which 100 g of lactose, a disaccharide of glucose and galactose, is administered orally and serum glucose is monitored, as in the glucose tolerance test. Lactose intolerance is presumed to exist if the glucose levels rise less than 20 mg/dL; extreme lactase deficiency is evident by osmotic diarrhoea.

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lactose tolerance test

A test for lactase deficiency, based on oral loading of lactose. See Lactose, Lactose intolerance. Cf Glucose tolerance test.

McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.