I don't think GH effects peak at 18iu. But neither is it advisable to even approach that unless you are a mass monster already. The main sides are water retention and insulin resistance. Insulin resitance is most likely not a proble >5iu. But it's not that simple with the IR, the temporary IR may be tied to the fat loss effects. GH makes fat more insulin resistant and muscle more sensitive, thus the fat cells don't uptake nutrition as well > less bodyfat. GH makes the body in general start to release fatty acids so the glucose "doesn't have anywhere to go," so builds up in the system on higher dosages. Glucose is organ toxic. Use a glucometer in morning occasionally to see
trends.
Some feel GH can immediately bloat the stomach, this is water, it's like what can happen with insulin, or even Anadrol. But it's just temporary and at low dosages many don't get it. I think the 18iu for HIV is a dirty trick by the pharma companies, in reality none of the homos can tolerate it, so they sell the rest.
I would suggest half a bottle a day (5iu) to gauge the effects.
It can work quickly but also most say it should be taken for long periods because it's so weak.
"It makes everything else work so much better" is what they say.
The cancer is theoretical. I mean steroids themselves alreay theoretically increase cancer risk. Like I've said before, some people even avoid milk to avoid cancer. Milk is so anabolic and increases the dreaded igf-1 which is the main hormone stimulated by GH.
Take whenever. There is no concensus. A single bolus dosage seems popular now. No need to stress timing at all.
It has been said Jay for example did 2 bottles of Serostim a day. I'm sure Ronnie the same. Heiko Kallbach is highest dosage admitted, 54iu a day. Dorian and Vince Taylor said a steady 8iu. A HRT dosage is typically like 1-1.5iu a day.