If you've never taken HGH before you might want to start at a lower dose and work your way up to avoid getting any negative side effects. I started at 1iu a day for a week and went up 1iu per week till I reached 4iu's and experienced next to no negative side effects.
I personally do both single and split dose injections based on my plans for each day. I work 2 24 hour shifts per week and getting a injection in during the middle of the day can be troublesome when I work so I usually just pin all 4iu's around 5am on those day. On my days off I'll split it up doing 2iu's at 5am and then the other 2iu's at 2pm. As long as your consistent I don't think it make a huge difference if you split it up or not until you start taking really large doses. Just my opinion. GL
