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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 persistence or lactose tolerance is the continued activity of ... The first one, known as the cultural ... Lactose favors the intestinal absorption of calcium ...
“The intestines contain billions of bacteria,” Pall says. ... As long as you’re not lactose intolerant, he says it’s also good to include some dairy in your diet; it provides nutrients ...
"Bloating is one of the symptoms of a common digestive problem known as a disorder of the gut-brain interaction,” says Kim Kulp, RD, a gut health nutrition expert. ... However, the lactose is ...
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 ...
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.