Anyone heard of HCG drops for weight loss?

[willow5]

One of DPs young cousins had been posting on her FB status about how much weight she's lost using HCG Ultra drops. I don't think they sound particularly healthy, well I don't think any of the quick fix weight loss gimmicks sound healthy, but that's just me. Anyway I don't know anything about these never heard of them until she posted about them so was just wondering if anyone in here knows about them. Would like to hear other's opinions and learn anything about them I can.
This young girl is very image driven, wanted to be a model etc and I worry she may be using a quick fix with out knowing any possible side effects.

Sorry the title is incorrect it should read HCG not HSG. Mods if you can edit that would be great so I don't look like a complete moron