Ah, the HCG Diet.
HCG is ONLY allowed in injections. It is NOT available in drops. If it is, it’s ILLEGAL. Aside from the legal aspect, do you really want drops under your toungue entering your bloodstream- and not knowing what’s in them?!
So yes, HCG diet causes you to lose weight, quickly. You eat 500 calories a day for 21 days (phase 1). You lose weight because you’re starving yourself, simple as that. Apparently, HCG prevents you from feeling hungry during this phase, and stops you from losing muscle. Bullcrap. You can’t lose that much fat in that little time. You lose about 10 lbs of water, then fat/muscle etc.
Seriously people. I know you want to lose weight- but really, if this was the “secret” to weight loss, why are 60% of us overweight? 
Do not do this and harm your metabolism. I won’t tell you how long it’s taken to get mine back after years of too low calorie diets.
And I don’t expect you to take my word for it either- here are some credible medical sources. No they’re not “blogs” or “opinions” or “experiences”, they’re facts. Everyone knows someone who’s lost weight doing this, and they’ve either gained it back- or they’re living the rest of their lives at low calories, starting more “phases” of HCG everytime they gain.
American Journal of Clinical Nutrition: 1976
http://archinte.ama-assn.org/cgi/content/abstract/137/2/151
“Mean weight loss in the HCG-treated group was nearly identical to that achieved by women given the placebo.”
Journal of the American Medical Association: 1977
http://www.ajcn.org/content/29/9/940.abstract
“Twenty of 25 in the HCG and 21 of 26 patients in the placebo groups completed 28 injections. There was no statistically significant difference in the means of the two groups in number of injections received, weight loss, percent of weight loss, hip and waist circumference, weight loss per injections, or in hunger ratings. HCG does not appear to enhance the effectiveness of a rigidly imposed regimen for weight reduction.”
British Journal of Clinical Pharmacology: 1995
http://www.ncbi.nlm.nih.gov/pubmed/8527285?dopt=Abstract
“We conclude that there is no scientific evidence that HCG is effective in the treatment of obesity; it does not bring about weight-loss of fat-redistribution, nor does it reduce hunger or induce a feeling of well-being.”
South African Medical Journal: 1990
http://www.ncbi.nlm.nih.gov/pubmed/2405506?dopt=Abstract
Subjects receiving HCG injections showed no advantages over those on placebo in respect of any of the variables recorded. Furthermore, weight loss on our diet was similar to that on severely restricted intake.
WebMD: 2007 (Review of The Weight Loss Cure ‘They’ Don’t Want You to Know About by serial conman Kevin Trudeau)
http://www.webmd.com/diet/features/weight-loss-cure-dont-want-you-to-know?page=3
“Scientific studies have demonstrated that hCG injections do not cause weight loss, and regulatory actions by the Federal Trade Commission and Food and Drug Administration (FDA) have curbed their use in the United States,” says Quack Watch.org owner and director Stephen Barrett, MD.
Starving yourself (and yes, 500 calories is starving- not even enough for your brain to function properly) can’t be the solution. Nor can a “tincture” of HCG (that isn’t legal nor does it contain HCG) “mobilize abnormal andripose fat” and “provide 1500-4000 calories a day” and make you not hungry. Ever seen a not hungry pregnant woman?
I liken this to a post promoting anorexia or bulimia. If anyone came on saying how great it was or weight loss- we would caution the same way. Yes, it works, but so does cutting a leg off. Doesn’t make it safe .