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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.
In metabolism, the β-glycosidic bond in D-lactose is hydrolyzed to form D-galactose and D-glucose, which can be absorbed through the intestinal walls and into the bloodstream. The overall reaction that lactase catalyzes is as follows: C 12 H 22 O 11 + H 2 O → C 6 H 12 O 6 + C 6 H 12 O 6 + heat. lactose + H 2 O → β-D-galactose + D-glucose
Lactose intolerance does not cause damage to the gastrointestinal tract. [2] Lactose intolerance is due to the lack of the enzyme lactase in the small intestines to break lactose down into glucose and galactose. [3] There are four types: primary, secondary, developmental, and congenital. [1]
Lactase is an enzyme that breaks down the disaccharide lactose to its component parts, glucose and galactose. Glucose and galactose can be absorbed by the small intestine. Approximately 65 percent of the adult population produce only small amounts of lactase and are unable to eat unfermented milk-based foods. This is commonly known as lactose ...
In the human body, disaccharidases are made mostly in an area of the small intestine's wall called the brush border, making them members of the group of "brush border enzymes". A genetic defect in one of these enzymes will cause a disaccharide intolerance, such as lactose intolerance or sucrose intolerance.
On top of that, many of the more popular cheeses in Europe are actually lactose-free cheeses, as they're often made from goat and sheep milk, like Spanish Manchego, Italian Pecorino, as well as ...
One cup of low-fat milk has 8 grams of protein and 100 calories, while Greek yogurt provides 15 grams of protein in a small 5.3-ounce container. As for cottage cheese, half a cup has about 12 ...
A Brooklyn homeless shelter employee was brutally stabbed to death on the premises of a hotel converted to house the homeless, in the Brownsville neighborhood.