For now, Nizoral or the new ketoconazole shampoo, Revita (2% keto instead of the 1% keto in Nizoral).
Nizoral has been tested.
However, if youre interested in the anti-androgenic potential of Revivogen's shampoo, you can test it to see if it reduces body hair on your arm vs. washing the other arm in Nizoral. Leave in for a couple of minutes. In about 4 months from the start date, you can compare and see which one reduced the body hair (body hair has to have male hormones to grow) the most.
I did a similar test on my wrists with revivogen and crinagen lotions. Crinagen did barely anything, but revivogen really did lessen body hair there, thus I conclude that it has some efficacy.
If a bunch of just us guys would test a few of these things topically, we could probably eliminate alot of the anti-androgens that dont work ourselves. Especially if you take a picture or two of the results and post them.