421 is definitely good to go. 1.8 iu of Serostim puts me in the low 300s if I recall correctly, but the dosing and the results aren't universal for everyone.
I wouldn't want my IGF-1 any higher that that chronically ( years on end) without a break, but that's just me.
There are 3 loves in my life: my wife, my English mastiffs, and my weightlifting....Man, my wife gets really pissed when I get the 3 confused...
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