That is a very broad question...without knowing your history, or your current status. Also, short and long term goals.
I remember this from a few months ago.
GH, good diet...not soo good.
GH, SLIN...good diet....good
GH, SLIN, AAS, and a good diet.....EXPLOSION!!!
try doing a search, this topic has been covered a lot in the past 6 months.