Any serious research will produce a long list of potential adverse reactions. Most doctors, even those who specialize in weight loss, will not advocate or prescribe H.C.G. for these reasons. However, there are some dishonorable doctors who will do it when they are pressured by ignorant patients. The following list is not complete, but it gives a glimpse into the reality of H.C.G. consequences.
Known Effects of Real H.C.G.
Ovarian hyperstimulation syndrome (OHSS)
Birth deformities, if taken during pregnancy
Early puberty
Prostate cancer
Severe pelvic pain
Swelling of the hands and legs
Stomach pain and swelling
Shortness of breath
Weight gain
Diarrhea
Nausea and vomiting
Headaches
Depression
Breast tenderness and swelling
Edema
Reduced penis size
And in any case, "The H.C.G. offered by the plethora of Internet scammers and retail stores is actually a homeopathic preparation. Due to real H.C.G. being available only by prescription, the non-prescription homeopathic preparations cannot contain any amount of the substance. It is only water, in other words."
So it is either buy water on the internet, which will have no effect, or somehow get real H.C.G. which will have the bad effects listed above.
See healthwyze.org/index.php/component/content/article/449-the-hcg-diet-scam-exposed.html