Adding growth hormones to beef and milk nudges a consumer's cancer risk upward. Growth hormones have been banned in Europe since 1989, but in the U.S., about 60% of cattle get them. These days, you can buy dairy products from cows that received no growth hormones. When it comes to meat, look for cuts labeled "no hormones administered" or "certified organic." By the way, chicken and pork are raised without growth hormones, so don't pay extra for a label saying so!