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When lactose intolerance is due to secondary lactase deficiency, treatment of the underlying disease may allow lactase activity to return to normal levels. [6] In people with celiac disease, lactose intolerance normally reverts or improves several months after starting a gluten-free diet, but temporary dietary restriction of lactose may be needed.
These gases are the cause of abdominal pain and other symptoms. [38] [41] Lactose intolerance does not cause damage to the gastrointestinal tract. [42] There are four types: primary, secondary, developmental and congenital. [43] Primary lactose intolerance is caused by decreasing levels of lactase brought on by age. [43]
It breaks down the sugar lactose into its component parts, galactose and glucose. Lactase is found in the brush border of the small intestine of humans and other mammals. People deficient in lactase or lacking functional lactase may experience the symptoms of lactose intolerance after consuming milk products. [1]
Some types of food allergies among children resolve with age, including those to milk, eggs, and soy; while others such as to nuts and shellfish typically do not. [2] In the developed world, about 4% to 8% of people have at least one food allergy. [1] [2] They are more common in children than adults and appear to be increasing in frequency. [2]
This is a shortened version of the third chapter of the ICD-9: Endocrine, Nutritional and Metabolic Diseases, and Immunity Disorders.It covers ICD codes 240 to 279.The full chapter can be found on pages 145 to 165 of Volume 1, which contains all (sub)categories of the ICD-9.
Food intolerance is a detrimental reaction, often delayed, to a food, beverage, food additive, or compound found in foods that produces symptoms in one or more body organs and systems, but generally refers to reactions other than food allergy.
Some degree of bloating is normal, according to doctors — especially after a large meal — but experiencing it chronically may be a sign of a medical issue such as IBS or lactose intolerance ...
Roughly 10% of children with a milk allergy will have a reaction to beef. [51] Lactose intolerance, a common reaction to milk, is not a form of allergy at all, but due to the absence of an enzyme in the digestive tract. [52] Those with tree nut allergies may be allergic to one or to many tree nuts, including pecans, pistachios, and walnuts. [48]