Intolerance, lactose
The inability to digest lactose, a sugar component of milk and most other dairy products. Lactose is sometimes also used as an ingredient in other foods, so those with a lactase deficiency should check labels carefully. The basis for this condition is lack of an enzyme in the small intestine called lactase. Lactase is essential to digest lactose. Without enough lactase, there is lactose intolerance. Underproduction of lactase can cause difficulty digesting lactose- containing products, which include dairy products themselves and foods containing dairy products as ingredients. The most common symptoms of lactose intolerance are diarrhea, bloating, and gas. The diagnosis may be made by a trial of a lactose- free diet or by special testing. In some cases, other diseases of the intestine may need to be excluded by further medical evaluation. Most people are born with the ability to make adequate amounts of lactase but lactase production normally declines with age, more so in some persons than others, and there are also significant differences relative to lactase production among ethnic groups.

Medical dictionary. 2011.

Look at other dictionaries:

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

  • Intolerance — is an antonym to tolerance . The term may refer to one of the following.;Medical/biological conditionsIn medical/biological context the term is commonly used synonymously with sensitivity , e.g., salycylate sensitivity , cold sensitivity ,… …   Wikipedia

  • lactose — A disaccharide present in mammalian milk, occurring naturally as α and β l.; obtained from cow s milk and used in modified milk preparation, in food for infants and convalescents, and in pharmaceutical preparations; large doses act as an osmotic… …   Medical dictionary

  • Intolerance au lactose — Intolérance au lactose La digestion du lactose qui ne se fait pas chez les personnes intolérantes. L’intolérance au lactose est l’incapacité à digérer le lactose (sucre de lait) à cause de l’absence ou de la quantité insuffisante d’enzymes… …   Wikipédia en Français

  • Intolérance Au Lactose — La digestion du lactose qui ne se fait pas chez les personnes intolérantes. L’intolérance au lactose est l’incapacité à digérer le lactose (sucre de lait) à cause de l’absence ou de la quantité insuffisante d’enzymes digestives. Somma …   Wikipédia en Français

  • Lactose — Général Nom IUPAC β D galactopyrannosyl (1→4)β D glucopyrannose Synonymes …   Wikipédia en Français

  • Lactose — (Milk sugar) IUPAC name β D galactopyranosyl (1→4) D glucose …   Wikipedia

  • lactose intolerance — lac tose in*tol er*ance (l[a^]k t[=o]s [i^]n*t[o^]l [ e]r*ans), n. A physiological condition in which lactose cannot be hydrolyzed in the intestine, leading to uncomfortable gaseousness, cramps, or diarrhea after eating a lactose containing food… …   The Collaborative International Dictionary of English

  • Intolerance — Intolérance Cette page d’homonymie répertorie les différents sujets et articles partageant un même nom …   Wikipédia en Français

  • lactose intolerance syndrome — lactose intolerance syndrome. См. синдром Дуранда Холзела. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

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