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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.
The correlation between lactase persistence frequencies and latitude in 33 populations in Europe was found to be positive and significant, while the correlation between lactase persistence and longitude was not, suggesting that high levels of lactose assimilation were indeed useful in areas of low sunlight in northern Europe. [50]
When lactose intolerance is due to secondary lactase deficiency, treatment of the underlying disease may allow lactase activity to return to normal levels. [6] In people with celiac disease, lactose intolerance normally reverts or improves several months after starting a gluten-free diet , but temporary dietary restriction of lactose may be needed.
Since puppies drink their mother's milk, their bodies produce lactase, an enzyme that helps them digest the lactose sugars found in milk. Once they are weaned, however, they stop producing this ...
Many adult humans lack the lactase enzyme, which has the same function as β-galactosidase, so they are not able to properly digest dairy products. β-Galactose is used in such dairy products as yogurt, sour cream, and some cheeses which are treated with the enzyme to break down any lactose before human consumption. In recent years, β ...
Many adults are lactose intolerant because their bodies cease production of the enzyme lactase post childhood. However, mutations in the promoter region of the lactase gene (LCT) result in the continued production of lactase throughout adulthood in certain African populations, a condition known as lactase persistence. A study conducted by Sarah ...
Walmart's Great Value lactose-free milk beats almond milk any day, and it costs less than $3 with free shipping. I'm lactose intolerant: Only Walmart has my favorite lactose-free milk — and I ...
This is an autosomal recessive disorder and infants that can’t break down lactose have trouble with breastmilk, and develop diarrhea starting from birth. Sometimes, even those with lactase-persistence can develop temporary lactose intolerance as a result of infection or inflammation in the small intestine.