I have a couple of bottles of GNC "Fingerprinted" Nettle, which is made from the leaf as far as I can tell..Most of the stuff I have seen on Nettle talks about the root...Is the leaf effective??? I am taking 3000 mg a day in divided doses...It does seem to have a slight effect on the morning wood level..I would be interested in hearing other peoples opinion on this if you have had good, or no results with Nettle..Doses, results, brands, etc.........Thanks...