Women, and some men, are injecting a pregnancy hormone, human chorionic gonadotropin (hCG), to lose weight. (Derived from the urine of pregnant women.) They're combining it with a 500-calorie-a-day diet. The hormone is supposed to encourage fat loss "in all the right places," and to discourage fatigue and hunger from the dearth of calories:
Diet Plan With Hormone Has Fans And Skeptics, New York Times, March 7, 2011
The FDA says it doesn't work. People spending upwards of $1000/month think it does, or will. Major League Baseball outfielder Manny Ramirez took it. I'm not sure - there's a very strong placebo effect in paying lots of money, injecting yourself with a difficult-to-obtain substance, and keeping regular meetings with attentive healthcare professionals, better yet, high-profile Manhattan doctors.
If money was no object, would you inject it to lose weight?