why some people are lactose-intolerant? i mean is milk that bad for us to dgiest it? i have no problem with milk products..but my parents are lactose-intolerant so i was wondering what might be the cause behind it?
2007-09-03 11:39:43 · 3 answers · asked by Shimmy Shimmy 1 in Science & Mathematics ➔ Biology
Lactose intollerance is not a disorder, it is the natural condition of adult humans. People are biologically programmed to not digest milk shortly after puberty....sometimes it takes longer to develop. The enzyme which enables babies to digest the lactose in milk (lactase) is no longer produced. This has benefits in terms of helping reserve mammalian milk for those of the species who have to have it...namely infants. For some people, An evolutionary variation developed in certain people allowing them to digest milk, even as adults... where millk of cattle and other species was readily available to supplement or replace other foods. But the 'unnatural' condition is being able to digest milk....not the other way around.
2007-09-03 11:51:52 · answer #1 · answered by squeezie_1999 7 · 0⤊ 0⤋
Many people lose the ability to digest lactose ( they stop producing lactase) as they mature through their teens. you may find your ability waning as you get older.
2007-09-03 18:52:49 · answer #2 · answered by Treefrog 43 2 · 0⤊ 0⤋
http://digestive.niddk.nih.gov/ddiseases/pubs/lactoseintolerance/#cause
2007-09-03 18:49:11 · answer #3 · answered by David 4 · 0⤊ 0⤋