It's not the milk. In the study scientists noticed plaque deposits in the rats that were fed milk and watered with chlorinated water. We are on well water now, just as it comes out of the ground, and that alone is the only major difference between here, and where we used to live, and my wife's cholesterol level being half what it was. Sure, it may be coincidental, but when I looked at those studies, there did seem to be a connection.