HCG is used in weight loss treatment and also as a performance enhancing drugs and in my opinion is old world sorcery, cleaned up and modernized. I do not believe that health remedies should be taken from waste or disease matter. It is old world witch doctors and sorcerers who would instruct their patients to take poisons, drink urine or take remedies from diseased matter (many vaccines are derived from such matter today), to receive healing.

Making extracts out of urine and taking it orally or injecting it into a patient's vein has being proven to be dangerous and cancer causing. Premarin is an example of a drug derived from urine. Premarin has always carried a warning on its label because of research starting in 1975 showing substantially increased risk of endometrial cancer. Also Premarin showed that long-term use may increase the risk of strokes, heart attacks, blood clots, and breast cancer.

Urine is naturally produced by the body, but was not designed to be used as a natural remedy for any purpose. There are natural ways to heal the body and overcome excessive weight gain, but urine extract should not an option.

The below excerpt taken from Wikipedia article on HCG:

HCG Human Chorionic Gonadotropin is use for weight loss and fertility treatment and is produced in pregnancy that is made by the developing embryo after conception.

Like other gonadotropins, hCG can be extracted from urine or by genetic modification. Pregnyl, Follutein, Profasi, Choragon and Novarel use the former method, derived from the urine of pregnant women. Ovidrel, on the other hand, is a product of recombinant DNA.

Human chorionic gonadotropin is extensively used parenterally as an ovulation inducer in lieu of luteinizing hormone. In the presence of one or more mature ovarian follicles, ovulation can be triggered by the administration of hCG.

A controversial usage of hCG is as an adjunct to the British endocrinologist A.T.W. Simeons' ultra-low-calorie weight-loss diet (less than 500 calories).

Simeons, practicing at Salvator Mundi International Hospital in Rome, Italy, recommended low-dose daily hCG injections (125 IU) in combination with a customized ultra-low-calorie (500 cal/day, high-protein, low-carbohydrate/fat) diet loss of adipose tissue without loss of lean tissue. After Simeons' death, the diet started to spread to specialized centers and via popularization by individuals, such as the controversial author Kevin Trudeau, famous for promotion of alternative therapies and treatments.

The controversy proceeds from warnings by the Journal of the American Medical Association and the American Journal of Clinical Nutrition that hCG is neither safe, nor effective as a weight-loss aid.

In the world of performance enhancing drugs, hCG is increasingly used in combination with various anabolic androgenic steroid (AAS) cycles. As a result, hCG is included in some sports' illegal drug lists.