At the age of 19, your T levels should already be jacked.
Besides, it's best not to manipulate your natural hormone levels until you're a little older (that's just our opinion).
Why not try a 6-week Biotest BCAA binge?
Just about all our coaches swear by the stuff.
And there are plenty of protocols suggested, ranging from 10 to 40 per workout.
It's a pretty sure bet that you'll add a few pounds of muscle.