In an effort to get cows to produce more and more milk for a longer period of time, cows have been bred and developed to have overactive pituitary glands. Of course, it is evidenced from the milk they produce and the protein in it. According to Maynard Murray, MD, it is not affected by boiling, pasteurization, or cooking. It is not only found in milk, but in all milk products, including cheese. It does not include heavy cream and butter.