I like the Icariin. Needs to be dosed at like half a gram or more though. Which at half a gram, you only have 10 days worth. Best libido supp you can buy though, hands down IMO, is liftmode's maca. Or at least buy the same quality powder from Alibaba or ebay. It's basically a 100:1 extract. That stuff is the shit. Increased load size, increase arousal. Man that stuff is good. That needs to be dosed at 1-1.2 grams a day, but it's more than worth it.