The hCG Diet
With a claim that you could lose 30 pounds in 30 days, the hCG Diet seems pretty appealing on its surface. Too bad it requires being injected with human chorionic gonadotropin, a hormone extracted from the urine of pregnant women (and which is only approved to treat infertility). On top of that, you’ll be limited to 500 calories a day, which qualifies as anorexia nervosa.