I never said that Proviron restores HPTA -- just that it removes estrogen and lowers SHBG. HCG doesn't restore HPTA either and even the studies on Clomid are sketchy in regard to HPTA restoration (most " recovery" took weeks -- which would happen in most cases anyway) but it's a moot point if you experience all the negitive sides of Clomid. At any rate, I don't want to turn this into yet another CLomid debate. I believe the only thing that truly helps recovery is time. All ancilliary assistance , be it pharmaceutical or natural, only helps to ease the crash for the most part.
The evidence for most herbs in anecdotal, but quite convincing nontheless. Realize that there aren't too many organizations willing to spend hudreds of thousands of dollars on studies for something that may or my not prove benificial to bodybuilders. (There aren't even many studies on the use of anabolics for enhancement purposes. That doesn't mean they don't work) That's why you see so many "University Studies" as references in supplement ads. Basically, a supplement company can pay some college kids to do some tests and make "conclusions" in their favor. Neverthless, there have been some controlled studies on the ingredients mentioned and the feedback is impressive. On the "Articles" page for "Unleashed" , "Post-Cycle" and ZIP! there are about 10 references each regarding studies on the effectiveness of the ingredients if you want to read them.