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Lactose (also referred to as milk sugar) is a sugar which is found most notably in milk. Lactose makes up around 2–8% of milk (by weight). The name comes from the Latin word for milk, plus the -ose ending used to name sugars. Its systematic name is β-D-galactopyranosyl-(1↔4)β-D-glucopyranose.

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Wikipedia about lactose

Lactose (also referred to as milk sugar) is a sugar which is found most notably in milk. Lactose makes up around 2–8% of milk (by weight). The name comes from the Latin word for milk, plus the -ose ending used to name sugars. Its systematic name is β-D-galactopyranosyl-(1↔4)β-D-glucopyranose.

Chemistry

Lactose is a disaccharide that consists of β-D-galactose and β-D-glucose fragments bonded through a β1-4 glycosidic linkage.

Solubility

Lactose has a solubility of 1 in 4.63 measured %w/v. This translates to 0.216 g of lactose dissolving readily in 1 mL of water.

The solubility of lactose in water is 18.9049 g at 25°C, 25.1484 g at 40°C and 37.2149 g at 60°C per 100 g solution. Its solubility in ethanol is 0.0111 g at 40°C and 0.0270 g at 60°C per 100 g solution.

Digestion of lactose

Main: Lactose intolerance Infant mammals are fed on milk by their mothers. To digest it an enzyme called lactase (β-D-galactosidase) is secreted by the intestinal villi, and this enzyme cleaves the molecule into its two subunits glucose and galactose for absorption.

Since lactose occurs mostly in milk, in most mammals the production of lactase gradually decreases with maturity.

Many people with ancestry in Europe, the Middle East, India, or parts of East Africa, maintain normal lactase production into adulthood. In many of these cultures, mammals such as cattle, goats, and sheep are milked for food. Hence, it was in these regions that genes for lifelong lactase production first evolved. The genes of lactose tolerance have evolved independently in various ethnic groups. People who are not tolerant may suffer certain socially unacceptable symptoms of too much lactose consumption. basically, lactose is not broken down and provides food for gas producing gut flora. This leads to bloating, and flatulence and perhaps GI upset.

Search results for Lactose

Lactose Intolerance

If you have lactose intolerance, you're not alone. Millions of Americans have the condition. ... Jessie has lactose intolerance and her symptoms flare up when ...kidshealth.org/teen/food_fitness/nutrition/lactose_intoleran...

Lactose Intolerance Causes, Symptoms, Diagnosis and Treatment on ...

Read about lactose intolerance, an inability to digest and absorb the sugar in milk. ... What are the symptoms of lactose intolerance? ...www.medicinenet.com/lactose_intolerance/page7.htm

Why Does Milk Bother Me?

Defines lactose intolerance and provides information on its symptoms, diagnosis, and treatment ... anything to help me digest lactose? What else do I need to ...digestive.niddk.nih.gov/ddiseases/pubs/lactoseintolerance_ez...

Consumer Update

Lactose intolerance can be managed by avoiding or eating less of certain foods and reading labels for hidden sources of lactose.www.fda.gov/consumer/updates/lactose032508.html

CIGNA - Lactose Intolerance

When lactose moves through the large intestine (colon) without being properly ... Some people with lactose intolerance cannot digest any milk products, while ...www.cigna.com/healthinfo/hw177971.html

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News about Lactose

She’s a whiz at adapting recipes to meet special dietary needs

Cleveland Jewish NewsSome people can make buttery, crunchy chocolate chip cookies simply by gathering ingredients and following the recipe on the back of a bag of chocolate chips.http://www.clevelandjewishnews.com/articles/2008/10/03/featu...

OUR VIEW: Business graveyard

Ball State Daily NewsBoRics Family Haircare Center has closed after 15 years in the Village. With banners faded from age, the building itself was unobtrusive, making it easy for people to walk by without noticing it.http://www.bsudailynews.com/home/news/2008/10/03/Forum/Our-V...

Berry Chill Announces 'Selection '08,' Presidental Debate Viewing Parties Oct. 7 and Oct. 15

PR Newswire via Yahoo! Finance Will it be Obama or McCain? Selection '08 at Berry Chill could help give an early indication of the city's favorite this month, as the chilled yogurt shop debuts the limited-edition Berry Obama and McCain Crunch menu items.http://biz.yahoo.com/prnews/081003/aqf009.html?.v=62

Blizzard Beach Ice Cream Shop opens on Gause

St. Tammany NewsThere’s almost nothing as comforting or refreshing as a dish of ice cream, and Slidell residents now have a new place to find their favorite treat.http://www.thesttammanynews.com/articles/2008/10/03/news/doc...

Jalapeno burger is part of the good stuff

The FactsEditor’s note: Be sure to check out Page 3C to see Gin’s column which was scheduled to run Sept. 17 in Brazos Living, but was not published because of Hurricane Ike.http://www.thefacts.com/story.lasso?ewcd=473af405db9a3f7e

News about Lactose

Simple Test To Detect Fake Medicines

Medical News TodayThe study tested a series of dummy paracetamol tablets made with varying degrees of real medicine, versus lactose (an ingredient used by counterfeiters to replace the active drug)http://www.medicalnewstoday.com/articles/120729.php

Eat Right, Live Well

Egypt TodayBut they often have gas and are lactose intolerant, so they can take their calcium from sesame. But calcium is not absorbed by the body on its own, and needs vitamin D.http://www.egypttoday.com/article.aspx?ArticleID=7068

Unpasterized Milk Producers Claim Raw Deal

The Epoch TimesJongerdan says she knows of people who are lactose intolerant who can drink raw milk without any ill effects. A 2006 British study found that drinking just a few glasses of raw milk a week reduced a child’s chances of developing eczema by close to ... http://en.epochtimes.com/n2/canada/raw-milk-producers-4070.h...

Food Allergies

KOLD-TVLactose intolerance is sometimes mistaken for milk allergy. Lactose intolerance is a problem of digestion due to an enzyme deficiency, with cramps and diarrhea the common hallmarkshttp://www.kold.com/Global/story.asp?S=1228720

Food allergy

HealthCentral.comwheat and other gluten-containing grains (see celiac disease) cow's milk and dairy products (see lactose intolerance) corn products; A food allergy frequently starts in childhood ... http://www.healthcentral.com/allergy/introduction-000817-108...

Search results for Lactose

MedlinePlus: Lactose Intolerance

Lactose Intolerance ... National Institutes of Health. The primary NIH organization for research on Lactose Intolerance is the National Institute of Diabetes and ... http://www.nlm.nih.gov/medlineplus/lactoseintolerance.html

Lactose Intolerance, Milk Allergies, IBS and Food Colors

Lactose intolerance and milk allergies are very common but remain underestimated. This is a comprehensive guide about these conditions and about Irritable Bowel Syndrome. We ... http://www.lactose.co.uk/

Lactose Intolerance

Explains the mechanism involved in the inability to digest lactose, diagnostic tests, and diet modificationshttp://digestive.niddk.nih.gov/ddiseases/pubs/lactoseintoler...

100 Percent Lactose Free Entertainment

The ultimate information source on lactose intolerance - causes, treatments, and cures. Includes lactose free recipes, a survey, and blog.http://www.lactoseintolerant.org/

lactose.com.au - Document - FAQ

If you are new to lactose intolerance and don't know where to begin, you may have the following questions:http://www.lactose.com.au/doc/faq
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Lactose Intollerant

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Lactose Intolerant? Allergic to Gluten?A new non-dairy, nonsoy, gluten-free alternative just hit the market.Flash - Video

Sci-Tech: Lactose intolerance

Sci-Tech: Lactose intoleranceFor years many have wondered why some people are lactose intolerant and others are not. New research is providing answers that may have a significant impact when it comes to...Flash - Video

Videos found for Lactose

Lactagen (A Solution to Lactose Int...

Lactagen (A Solution to Lactose Intolerance) Testimonial by Chung...Lactagen (A Solution to Lactose Intolerance) Testimonial by Chung (High) 1 min 15 sec - Nov 1, 2006 Lactagen (A Solution to Lactose Intolerance) Testimonial by Chung (High) - www.lactagen.comflash: 0 MB w:320px - h:240px

Lactagen (A Solution to Lactose Int...

Lactagen (A Solution to Lactose Intolerance) Testimonial by Chung...Lactagen (A Solution to Lactose Intolerance) Testimonial by Chung (Low) 1 min 15 sec - Nov 1, 2006 Lactagen (A Solution to Lactose Intolerance) Testimonial by Chung (Low) - www.lactagen.comflash: 0 MB w:320px - h:240px

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21-10.smil

21-10.smilGlucopyranose Structure into itsProper and Conventional Chair Conformational Rendering Furanose Rings Disaccharides - Lactose Polysaccharides - Cellulose and Starch Polysaccharides -Cellulose and Star...realmedia: 2.8 MB w:352px - h:240px

Casting Ripe - Jen Johnson

Casting Ripe - Jen JohnsonThis California girl loves daily servings of ice cream, traveling and hanging out with friends and family. You're not lactose intolerant are you?quicktime: 21.7 MB w:320px - h:240px

Answers for Lactose

alactasic

Has anyone faced difficulties in making cheese out of lactose-free milk? How did you solve them?

alactasicabsolutely, the tighter the weave, the smoother the cheese
migrainegirl1

What's the difference between being allergic to milk and being lactose intollerant?

migrainegirl1They are not the same thing... "Lactose intolerance" is a condition in which lactase, an enzyme needed for proper digestion of lactose (a sugar that is a constituent of milk and other dairy product...
Miji

How can you determine how much lactose is in a specific food? I don't see that on any labels?

MijiFor those who are very sensitive to small amounts of lactose, there are two options. First, all foods should be carefully checked for lactose. Grocery items such as bread, baked goods, cereals, instan...
Addy

Anyone knows if a flan can be made with lactose-free milk?

AddyDefinitely. My wife is also lactose intolerant. We make everything with lactose free milk (even ice cream). The Lact-Aid brand is available in everything from whole milk to skim. It works exactly the ...
crayola girl

Do hard cheeses like parmesan have less lactose than soft cheeses like cheddar?

crayola girlI am also lactose intolerant. There are all sorts of things that affect, and don't affect me. I can actually eat certain kinds of ice cream but then others KILL ME! I am sure it is just the way his...

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