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  2. Lactose intolerance - Wikipedia

    en.wikipedia.org/wiki/Lactose_intolerance

    Lactose intolerance is caused by a lessened ability or a complete inability to digest lactose, a sugar found in dairy products. [1] Humans vary in the amount of lactose they can tolerate before symptoms develop. [1] Symptoms may include abdominal pain, bloating, diarrhea, flatulence, and nausea. [1] These symptoms typically start thirty minutes ...

  3. Hydrogen breath test - Wikipedia

    en.wikipedia.org/wiki/Hydrogen_breath_test

    A hydrogen breath test (or HBT) is used as a diagnostic tool for small intestine bacterial overgrowth and carbohydrate malabsorption, such as lactose, fructose, and sorbitol malabsorption. [1][2] The test is simple, non-invasive, and is performed after a short period of fasting (typically 8–12 hours). [3] Hydrogen breath tests are based on ...

  4. Lactase persistence - Wikipedia

    en.wikipedia.org/wiki/Lactase_persistence

    Lactose solution is then given to the subjects to drink, and blood glucose levels are checked at 20 minute intervals for an hour. The subjects who show a substantial rise in their blood glucose level are considered lactose tolerant. [22] A hydrogen breath test is often used to detect lactose intolerance. [citation needed]

  5. Food intolerance - Wikipedia

    en.wikipedia.org/wiki/Food_intolerance

    Gastroenterology, immunology. 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. Food hypersensitivity is used to refer broadly to both food intolerances ...

  6. Galactosemia - Wikipedia

    en.wikipedia.org/wiki/Galactosemia

    Galactosemia (British galactosaemia, from Greek γαλακτόζη + αίμα, meaning galactose + blood, accumulation of galactose in blood) is a rare genetic metabolic disorder that affects an individual's ability to metabolize the sugar galactose properly. Galactosemia follows an autosomal recessive mode of inheritance that confers a ...

  7. Inborn errors of carbohydrate metabolism - Wikipedia

    en.wikipedia.org/wiki/Inborn_errors_of...

    Lactose is a disaccharide sugar composed of galactose and glucose that is found in milk. Lactose can not be absorbed by the intestine and needs to be split in the small intestine into galactose and glucose by the enzyme called lactase; unabsorbed lactose can cause abdominal pain, bloating, diarrhea, gas, and nausea.

  8. Food allergy - Wikipedia

    en.wikipedia.org/wiki/Food_allergy

    Frequency. ~6% (developed world) [1][2] A food allergy is an abnormal immune response to food. The symptoms of the allergic reaction may range from mild to severe. They may include itchiness, swelling of the tongue, vomiting, diarrhea, hives, trouble breathing, or low blood pressure. This typically occurs within minutes to several hours of ...

  9. Coeliac disease - Wikipedia

    en.wikipedia.org/wiki/Coeliac_disease

    Coeliac disease (British English) or celiac disease (American English) is a long-term autoimmune disorder, primarily affecting the small intestine, where individuals develop intolerance to gluten, present in foods such as wheat, rye and barley. [ 10 ] Classic symptoms include gastrointestinal problems such as chronic diarrhoea, abdominal ...

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