Best protein for growth is regular or lean ground beef.
Wait till it goes on sale for 2$/lb and go hard.
Will out do all the lean proteins, and shakes.
Why? More TOTAL calories.
Fats will also help hormonal profile, to much lean protein with no fat and you'll lose a lot of your testosterone building potential.
"The most merciful thing in the world, I think, is the inability of the human mind to correlate all its contents... some day the piecing together of dissociated knowledge will open up such terrifying vistas of reality, and of our frightful position therein, that we shall either go mad from the revelation or flee from the light into the peace and safety of a new Dark Age."
-H.P. Lovecraft