Yeah you would need to cap it.
There ain't much I can't eat and I can eat raw icariin but after 1 week of eating uncapped raw icariin as was sick of it. Wish I'd never done it because the first thing I think about with icariin is the feeling after eating 3g+ raw icariin per day.
If you are going to do this than getting a good stock of long jack is key.
For any herb the hard part aint getting the most concerntrated prep but getting the best prep. Its certainly true of Gingko biloba, maca, Rhodiola and green tea. Its easy with green tea because each variety has a different name. I like Sencha but the white teas are considered better (lower caffeine).
I got a stock of long jack at 200:1 which is the strongest prep I've come across - it would be worth checking out each stock. I'm running lj now.
Icariin for straight out libido.
long jack for drive/ focus/ hunting.
I think if you combined resveratrol/icariin and 200:1 long jack you're close to a strong libido booster. The key will be sourcing good long jack - it ain't cheap. The other thing to add is ... monica .... I forget is name - its produces a jittery response - Amazon herb - I never used it but it could be good and its cheap.
The real thing to add is 6-year old ginseng. That ain't hard to source but its expensive. I think PP are trying to extract from cheap ginseng. If you've got real ginseng in there the guys will go crazy for it. The trouble is no one will buy it at first because of the mark up in price.