whats the most hardcore supplement promoting gains in muscle MASS? i have a 4 and a half year 'hardcore/intense' weightlifting experience so i know the basics already
yes i know eating right and proten is all anybody needs but...
everything aside, all healthyness and all obvious weightlifting tips like the two i stated above; what is THE BEST supplement helping promote heavy gains in muscle mass
and not a steroid =]
does anything like that even exist? im just curious honestly because my freind will give me half the price of the supplement if i buy something in this criteria