Deficiency, lactase
Not enough of an enzyme called lactase in the small intestine to digest lactose, a prominent component of milk and most other dairy products. Lactose is sometimes also used as an ingredient in other foods, so anyone with lactase deficiency should check food labels with care. Most people are born with the ability to make adequate amounts of lactase, but lactase production tends normally to go down with age, more so in some persons than others. There are significant differences in lactase production among different ethnic groups. Inadequate lactase production can cause difficulty digesting lactose-containing products, which include dairy products themselves and any foods containing dairy products as ingredients. The most common symptoms of lactase deficiency are diarrhea,

Medical dictionary. 2011.

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  • Lactase deficiency — Not enough of an enzyme called lactase in the small intestine to digest lactose, a prominent component of milk and most other dairy products. Lactose is sometimes also used as an ingredient in other foods, so anyone with lactase deficiency should …   Medical dictionary

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  • Lactase — Enzyme that breaks down the milk sugar lactose into glucose and galactose. Persons with a deficiency of lactase in the gut can develop abdominal cramping and diarrhea after ingesting milk products. * * * SYN: β d galactosidase. * * * lac·tase lak …   Medical dictionary

  • lactase deficiency — noun congenital disorder consisting of an inability to digest milk and milk products; absence or deficiency of lactase results in an inability to hydrolyze lactose • Syn: ↑lactose intolerance, ↑milk intolerance • Hypernyms: ↑genetic disease,… …   Useful english dictionary

  • deficiency — An insufficient quantity of some substance (as in dietary d. or hemoglobin d. in marrow aplasia); organization (as in mental d.); activity (as in enzyme d. or reduced oxygen carrying capacity of the blood), etc., of which the amount present is of …   Medical dictionary

  • disaccharidase deficiency — less than normal activity of disaccharidases of the intestinal mucosa. It usually denotes a generalized deficiency of all such enzymes secondary to a disorder of the small intestine, which clinically may be manifest only as a deficiency of… …   Medical dictionary

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  • Lactose intolerance — Classification and external resources Lactose (disaccharide of β D galactose β D glucose) is normally split by lactase. ICD 10 …   Wikipedia

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