Food...it is the most anabolic thing you can do for your muscles. Eat a good high protein diet with good clean complex carbs. There is no supplement on the market that will "build muscle quickly". If there was, we would all be taking it.
============
Quoting from beef-up:
What is a good and safe suppliment to help build muscle quickly?
=============
-------------- If you don't stand for something, you will fall for anything....