Difference between revisions of "Lactose intolerance"
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Lactose intolerance is a condition where individuals cannot digest [[lactose]], a [[sugar]] found in [[milk]]. When a lactose intolerant individual injests of milk, he or she will get a stomachache. Other symptons include cramps and bloating. Such individuals do not produce an [[enzyme]] called [[lactase]] that breaks down lactose after weaning. | Lactose intolerance is a condition where individuals cannot digest [[lactose]], a [[sugar]] found in [[milk]]. When a lactose intolerant individual injests of milk, he or she will get a stomachache. Other symptons include cramps and bloating. Such individuals do not produce an [[enzyme]] called [[lactase]] that breaks down lactose after weaning. | ||
| − | The proportion of lactose intolerant individuals varies by region on the planet. 99% of [[China|Chinese]] are lactose intolerant, whereas only 10% of [[United States|Americans]] are. Recent research indicates that lactose intolerance is high where [[cow]]s were not domesticated. | + | The proportion of lactose intolerant individuals varies by region on the planet. 99% of [[China|Chinese]] are lactose intolerant, whereas only 10% of [[United States|Americans]] are. Recent research indicates that lactose intolerance is high where [[cow]]s were not domesticated. At higher latitudes, lactose intolerance decreases. As average temperature increases, lactose intolerace increases. |
[http://digestive.niddk.nih.gov/ddiseases/pubs/lactoseintolerance/] | [http://digestive.niddk.nih.gov/ddiseases/pubs/lactoseintolerance/] | ||
[http://evolution.berkeley.edu/evolibrary/news/070401_lactose] | [http://evolution.berkeley.edu/evolibrary/news/070401_lactose] | ||
| + | [http://www.sciencedaily.com/releases/2005/06/050602012109.htm] | ||
Revision as of 00:30, April 26, 2007
Lactose intolerance is a condition where individuals cannot digest lactose, a sugar found in milk. When a lactose intolerant individual injests of milk, he or she will get a stomachache. Other symptons include cramps and bloating. Such individuals do not produce an enzyme called lactase that breaks down lactose after weaning.
The proportion of lactose intolerant individuals varies by region on the planet. 99% of Chinese are lactose intolerant, whereas only 10% of Americans are. Recent research indicates that lactose intolerance is high where cows were not domesticated. At higher latitudes, lactose intolerance decreases. As average temperature increases, lactose intolerace increases.