Tongat Ali again, Eurycoma Longfolia, Longjack-- same stuff-- promoted by John "mars-venus" gray. He's very confident it helps libido and I've taken it on and off over the years with not much in terms of obvious results. I always cycle through various supplments as experiments and I might try another cycle of this. Apparently the purity of the extract is really critical... so I'll pay attention to that. I currently have no access to Reddit so cannot compare notes with other life extenders and anti-agers.