Entire human populations are thus "lactose intolerant." Over the years, adults from other populations develop or adapt to a level of tolerance for cow's milk, but heavy cow's milk drinking by humans is not good idea because of immune system reactions to cows' milk proteins, which occur in all humans, some at a barely perceptible level, others much more seriously. For example, a child may be intolerant of cow's milk, but thrive on goat milk, or sheep's milk, even horse milk!
There are also benefits to humans, especially in the provision of calcium, balanced with an individual's lactose sensitivity. Some people are also violently allergic to eggs, an otherwise great source of protein for many others.
“Over the years, adults from other populations develop or adapt to a level of tolerance for cow’s milk”
The Finns have a very high level of tolerance for lactose and ingest a lot of dairy - they also have amongst the highest levels of osteoporosis. They are getting large amounts of calcium without the other nutrients with which it works in conjunction.
Do you have a source on that claim of universal intolerance to dairy proteins?
I worked out a home remedy for at least one person with lactose intollerance. I suspected that there might be a bacteria in the small intestine, so I recommended someone try to swallow LARGE slices of jallopeno peppers WHOLE. Not chopped up. The hypothesis was that the pepper would scrape along the small intestine’s wall and kill bacteria.
Just a few large slices that way each day.
I also recommended avoiding ALL dairy for a few months which is a lot harder than people think. Dairy byproducts are hidden in all kinds of things under different names.
Sure enough, the antibodies that kept attacking lactose withered on the vine. The person is now CURED. Drinks all the milk she wants.