There are those that will tell you “wait you are at your test producing peak don’t use it”.
What if his test is already high? He’s WASTING money then. Is it likely his test is low at 20? No.
It’s likely that at his age, a good diet would be the thing to concentrate on and NOT supplements.
A good diet is to be the focal point regardless and as stated if he has those bases covered already Alpha Male can positively affect his weight training results. It is an erroneous thought that only those with compromised test production will benefit from it. I know a few guys under 23 who have used it who don’t suffer from “low production” and feel they benefit from it greatly.
He can give it a try. Some people with high test will benefit from Alpha Male. Others won’t. I’m 24 and have high libido. Never tested test levels but I expect they’re high. Alpha Male does nothing for me. The only test booster I’ve noticed anything from performance and libido wise is MyogenX. And there, the effect is a minimal one. Some people don’t really need a boost and their bodies really just aren’t going to respond to Alpha Male. But some will, even if they are young and presumable have high test.