Hairlosstalk,
the reason there is no clinical data on all these DHT blockers is because they are naturally occuring compounds. Perhaps you are unaware, but you cannot hold a patent on a natural compound. Therefore, the drug companies have no interest in doing any type of study, clinical or otherwise because theres no money in it. In the pharmacological world of things, if you cant put a patent on it, its worthless. So there is no incentive to do clinical trials on it. Bottom line, only drugs go through clinical trials, not supplements, so get your facts strait.
Secondly, not doing clinical trials dose not proove anything or disproove anything. Simply because a claim has not been substantiated, does not mean that claim is not true.
And most physicians will agree that DHT is causing the Androgenic alopecia, and that an effective DHT blocker/inhibitor that can act in the scalp will be effective. No one is sure which drug or supplement it will be, but saw palmetto, isoflavones, equol, zinc or B6 may very well be one of them. So Id say take one or all of them and see what happens; As any intelliegent person knows, the real test of a drug/supplement is not in clinical trials, the real test is when it hits the mainstream, thats when the real effectivesness can be determined with certainty.