it's not that expensive, ~$22 for a 2 month supply for a real product.
http://www6.netrition.com/enzymatic_...rol_forte.html
if you take it in the morning every day with multivitamins you'll notice the benefits very soon.
transresveratrol is also a nice complementary product if you're using some tribulus based testosterone boosting supplements since it reduces estrogen and gives better t-boost.