Remember, I'm not a doctor nor do I play one on TV, I'm also not a cow but I will tell you why a cow's milk is not good for us. For one, it is intended to be used by a baby cow, hence the sole purpose of cows milk. A cow has four stomachs and is designed to benefit from the nutrients in the milk. How many adult cows do you see still slurping on an udder? As unnatural as drinking a cow's milk is for us humans, consider also that there are enough anabolic hormones and steroids in one glass of milk to make even Arnold Shwartenthingy jealous. Pasteurization does not remove these hormones, and if you realize what a mother's milk is intended to do, provide nutrients to a new born, then you can realize that milk is an effective delivery system. It is a base and allows nutrients to be absorbed without being broken down in the stomach. This means that all of Bessie's injected growth hormones and injected antibiotics used to combat the effects of the growth hormones, are passed on to you as well. These are then absorbed in your stomach because the delivery agent, Milk, neutralizes your stomach acid and allows this stuff to be absorbed into your system. This is why the argument that the stomach acid breaks down these chemicals, is not valid, milk is deigned by nature to be a delivery agent for growing babies, if the stomach was to break it down then most of the nutrients would be lost. For more detailed explanations and research to back it up, see www.notmilk.com