I've used 1-AD a few times and all I can say is that you get far better results if you stack it with 4-AD or 1,4-androstadiene-3,17-dione (Boldione is one of the brands of the 1,4 andro). I stacked with all three of these and they worked wonders! Also, as Too Swole said...throw in some 6-OXO at the end. I would've retained much more had I used this instead of simply ZMA.