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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 ...
Lactase persistence or lactose tolerance is the continued activity of the lactase enzyme in adulthood, allowing the digestion of lactose in milk. In most mammals, the activity of the enzyme is dramatically reduced after weaning. [ 1 ] In some human populations though, lactase persistence has recently evolved [ 2 ] as an adaptation to the ...
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 ...
Lactase (EC 3.2.1.108) is an enzyme produced by many organisms and is essential to the complete digestion of whole milk. 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 ...
Galactose. Galactosemia, the inability to metabolize galactose in liver cells, is the most common monogenic disorder of carbohydrate metabolism, affecting 1 in every 55,000 newborns. [2] When galactose in the body is not broken down, it accumulates in tissues. The most common signs are failure to thrive, hepatic insufficiency, cataracts and ...
Lactic acid fermentation is a metabolic process by which glucose or other six-carbon sugars (also, disaccharides of six-carbon sugars, e.g. sucrose or lactose) are converted into cellular energy and the metabolite lactate, which is lactic acid in solution. It is an anaerobic fermentation reaction that occurs in some bacteria and animal cells ...
In rare cases, bloating may occur in individuals who have milk intolerance (lactose intolerance), parasite infections such as giardia, food poisoning , celiac disease, severe peptic ulcer disease, bowel obstruction, or after certain types of abdominal surgery. [5] Heart failure and cirrhosis are also a common cause of distension. In both of ...
Irritable bowel syndrome (IBS) is a functional gastrointestinal disorder characterized by a group of symptoms that commonly include abdominal pain, abdominal bloating and changes in the consistency of bowel movements. [1] These symptoms may occur over a long time, sometimes for years. [2] IBS can negatively affect quality of life and may result ...