Optimal and reality are 2 different things here..lol
If you taking HRT then you dont need to take IGF just take HGH and that alone will increase the IGF to "optimum" levels. 3-5IUs of HGH a week is about just right for HRT.
If you wana grow then run IGF between 30-100mcg ED. First run use 30mcg ED then as you get more into it for subsequent cycles you can even do 100mcg ED. I have to tell all of you that HGH mixed with IGF is a great mix!
Fuck steroids alone...most of my gains I've made was on HGH, IGF and under 1 gram of gear and this is after years a steriods use alone and using as much as 2 gr of gear per week. If I had this shit years ago or for someone who wants to get into bulding their body I would start with HGH and IGF first anf when you add steroids a year or 2 later it will blow you away.
THe reason im saying this is that HGH and IGF builds from the core up...ligaments,increases muscle fibers etc shit that steriods will not do. So doing 2 gr of juice is IMO a waste of time, gear and effort and will not yield the results you may think it will.
Oh someone asked about HGH dosage...personally 2 IU ed to start and myabe up it to 4iu after a year or 2 of usage. But with the increase it will come sides..and bloating will def be a problem.
I have no clue how ppl can do 6iu and higher ED..I would prob die from water retension and high BP ,,lol