Lactose Intolerance

Globally, lactose intolerance is the most common adverse reaction to a specific food, with most cases the result of declining levels of intestinal lactase activity in later childhood and adult life, although rare congenital deficiencies can occur. Symptoms of lactase insufficiency are usually dose related and include bloating, flatulence, and diarrhea. Secondary lactase deficiency can result from viral gastroenteritis, radiation enteritis, Crohn's disease (CD), and celiac sprue. It is important from a management standpoint to understand that individuals with constitutive lactose intolerance (1) do not suffer severe and potentially life-threatening complications of ingesting lactose and (2) are able to consume naturally lactose free diary products including most cheeses and yogurts. This contrasts with cow's milk allergic individuals who may suffer anaphylactic or asthmatic reactions to dairy products and must avoid all foods containing the culprit cow's milk protein allergen, usually casein or p-lactoglobulin. There is a chapter on carbohydrate intolerance (see Chapter 62, "Lactose Intolerance").

Food Allergies

Food Allergies

Peanuts can leave you breathless. Cat dander can lead to itchy eyes, a stuffy nose, coughing and sneezing. And most of us have suffered through those seasonal allergies with horrible pollen counts. Learn more...

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