I ran 15iu per day (one vial of blacks) with no insulin and i grew very fast. Of course this was only two months into a cycle after taking close to a decade off so some of that was muscle memory, but when I incorporated the high dosed GH I saw an immediate spurt in growth and in 3-dimensional fullness that occured faster at higher doses with no need for slin. Plus just look at the physiques of guys who have used slin and guys who havent. I'd rather have a tight waist, separated muscle bellies, deep striations, good aesthetics, than a few extra pounds of muscle and a baloon looking physique.