I think you mean "lactose intolerant."Lactose is milk sugar. All small babies can digest lactose, but many people lose their ability to digest it as they get older--that is why they get sick from drinking milk. People who can still digest milk sugar as adults are "lactose tolerant"; people who cannot digest it are "lactose intolerant."
Some people don't produce any enzymes, including the one needed to digest lactose
I am trying to find that out! I will answer question when I find it! Sorry I probably shouldn't post this as the answer to your question, but I kinda am. :)
Dairy products can contain a sugar called 'lactose' to which some people are intolerant.
It is possible to add a bacteria to the milk that will digest the lactose. It is also possible to use a cottage or yogurt bacteria and change the milk to a more digestible form. You still have to treat the milk, not the person. Perhaps some day chromosome therapy will enable lactose intolerant people to enjoy milk.
They are known as people with lactose intolerance - and that's about it.
Skim milk has almost the same amount of lactose as full cream milk, so in terms of lactose intolerance it should be just as bad. Many people are helped by taking a digestive aid called Lactaid (or other similar products). They help with the digestion of the lactose.
Lactaid milk is made by adding the enzyme lactase to regular milk, which helps break down lactose, the sugar found in milk. This makes it easier for people who are lactose intolerant to digest. Regular milk contains lactose, which can cause digestive issues for some people who lack enough lactase enzyme.
Lactaid milk is milk that has had the lactose, milk sugar, removed. Some people cannot digest lactose so they have to drink milk without lactose if they want to drink milk.
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Are you talking about lactose intolerance? If so, people are lactose intolerant because they do not have the enzyme lactase that is use to digest the lactose. The gene that codes for the lactase cease to be express when they get older . Other people keep expressing the gene for their entire life.