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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.
This technology is used to add lactase to milk, thereby hydrolyzing the lactose naturally found in milk, leaving it slightly sweet but digestible by everyone. [4] Without lactase, lactose-intolerant people pass the lactose undigested to the colon [5] where bacteria break it down, creating carbon dioxide which leads to bloating and flatulence.
α-Lactalbumin is a protein that regulates the production of lactose in the milk of almost all mammalian species. [8] In primates, α-lactalbumin expression is upregulated in response to the hormone prolactin and increases the production of lactose.
Amy Reed, a spokesperson for the Academy of Nutrition and Dietetics, tells Yahoo Life that while whole milk is recommended for children under age 2, most adults should opt for low-fat milk ...
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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.
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Alpha-lactalbumin, which is expressed in response to prolactin, increases the affinity of N-acetyllactosamine synthase for its substrate, causing increased production of lactose during lactation. The interaction that facilitates lactose biosynthesis consists of a-lactalbumin (the regulatory unit) binding reversibly to the glycosyltransferase.