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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]
Lactase produced commercially can be extracted both from yeasts such as Kluyveromyces fragilis and Kluyveromyces lactis and from molds, such as Aspergillus niger and Aspergillus oryzae. [7] Its primary commercial use in supplements is to break down lactose in milk to make it suitable for people with lactose intolerance.
The ability to digest lactose is not an evolutionary novelty in human populations. Nearly all mammals begin life with the ability to digest lactose. This trait is advantageous during the infant stage, because milk serves as the primary source for nutrition. As weaning occurs, and other foods enter the diet, milk is no longer consumed.
This is likely due to lactose intolerance, a condition making it hard to digest lactose, a sugar found in dairy products. Most newborns are able to produce lactase, an enzyme crucial for the ...
Dietitians weigh in on how those with gluten and lactose-intolerances can tolerate foods on vacation. ... (plus a few lactose-intolerant for good measure), and they repeated having had similar ...
However the enzyme can be found in many plants (especially fruits), mammals, yeast, bacteria, and fungi. [29] β-galactosidase genes can differ in the length of their coding sequence and the length of proteins formed by amino acids. [30] This separates the β-galactosidases into four families: GHF-1, GHF-2, GHF-35, and GHF- 42. [31] E.
Dairy products may upset the digestive system in individuals with lactose intolerance or a milk allergy. [ 7 ] [ 8 ] [ 9 ] People who experience lactose intolerance usually avoid milk and other lactose-containing dairy products, which may cause mild side effects , such as abdominal pain, bloating, diarrhea, gas, and nausea.
Lactose, or milk sugar, is a disaccharide composed of galactose and glucose and has the molecular formula C 12 H 22 O 11.Lactose makes up around 2–8% of milk (by mass). The name comes from lact (gen. lactis), the Latin word for milk, plus the suffix -ose used to name sugars.