Sorry I'm late on this.
Some facts:
The average natural production of GH in younger males is .5iu to 1.5iu per day with 80% of the secretion occurring during the first 2 hours of REM sleep. Check my chart in the images gallery. So 2iu is not a light dose, especially if taken in the AM or afternoon, but not before bedtime. Why?
Because natural production is not "shutdown", like test does to testosterone. Exo GH only causes the pituitary to become a little "lazy" for several hours after the injection.
When I first used synthetic GH, I set out to dramatically change my body composition, so I used up to 12iu's a day during three 12 week cycles over the course of a year. I got just what I wanted in terms of size and leanness, and began trying out lighter maintenace doses. I seem to stay pretty close with 2 to 4 iu a day. I don't see a lot of difference with the higher amounts..... I believe that the body's natural defense mechanisms render mega doses largely a waste.
You won't go to zero at 35, but we do gradually lose our natural prouction.....a very big factor in the aging process. At 60, it is estimated that we produce 60% or less GH than a 25 year-old.
Ok, I like insulin with all GH cycles. Just adjust the dose to match your GH dose. Exo GH causes insulin resistance. You need insulin circulating with IGF-1 and your GH to get the right bang for your buck. For 2iu of GH, try 4 to 6 iu humalog.....if you are just using it to compliment the GH. Insulin is the second most anabolic substance available.
The only reason to go 5/2 is budget. As I said, we recover in a few hours from exo GH. Budget ain't a bad reason....GH isn't cheap.