Honestly, I don’t chase a “ideal / magic” IGF-1 number, brother (not a GH pro by any means, just learning little by little as I go.)… I just use it as a reference point. If baseline is sitting around 150–200, I like to see it at least double or triple once GH is doing its job. So somewhere in that 400–600+ range during a blast usually tells me things are firing right.
Now, in terms of conversion … from my own bloods and what I’ve seen with guys around me … running 5–8 IU daily typically takes me from a baseline in the 180–190 range straight into that 400–600 sweet spot. On cruise at 3 IU, I’ll hold closer to 250–350, which is still above natural but not “blast” level.
But at the end of the day, the real number that matters isn’t just IGF-1 on paper … it’s what you see in the mirror and how you feel. Better recovery, deeper sleep, tighter skin, pumps that stick, fat loss speeding up… of course that’s just my opinion. The bloodwork just proves what you already know is happening.