How to cause cancer
From watching Brainiacs, I discovered that if one mixes warm milk with vinegar, you get a precipitate – casein. It is the wrong form, but casein was one of the first plastics discovered.
The episode was answering a viewer question about foods one should not mix. A person on the show tried the casein, and found it tasted terrible. An unmentioned fact on the show is that casein protein greatly increases the chances of getting cancer.
It made me think about what happens after somebody eats a dairy product. The dairy product will mix with stomach acid, which in turn would seem to create clumps of casein inside the stomach. The negative effects might be somewhat offset by the positive properties of whey protein that is also in the milk, but there is still the fact that the presence of casein can be enough to activate cancer cells.
If one really wants protein, it is possible to buy whey protein by itself, without anything else. It also benefits people that are lactose intolerant, since whey protein can be purchased with lactose and other chemicals originally in the milk removed.