6 Synthetic Hormones (rBGH and rBST)

Where it's found: Milk and dairy products

Why it's bad: You've probably heard about the dangers of synthetic hormones by now, so it's borderline insane that they're still legal in the United States. Cows treated with them can become infertile and develop inflamed udders, so if we think humans are immune to the effects, we're wrong. The hormones have been linked to breast, colon, and prostate cancer, so it's definitely not something to mess around with.