If I were to offer you a cocktail drink of pituitary hormones, steroid hormones, thyroid and parathyroid hormones, gastrointestinal peptides, growth factors, growth inhibitors, fat, cholesterol, allergenic proteins, blood, pus, antibiotics, bacteria and viruses, would you drink this? Probably not, as you know that these constituents are unhealthy for your body. Well, believe it or not, this is what you get every time you drink cow's milk from the supermarket, but people still drink milk due to ignorance.