http :// press.endocrine. org /doi/full /10.1210 /jcem.85.2.6377 (I can't post links so please remove spaces)
*Exogenous hgh administration (sc) will not supress endogenous hgh production before 4 hours after administartion.
*IGF levels will raise slowly in 12 hours after administartion and then raise rapidly and reach a peak about 24 hours after administration.
*Exogenous hgh administration will supress endogenous hgh prduction for about 24 hours. This did even occur at small doses of 1-2iu a day.
*HGH is very dose dependant. A 10iu dose will give a ten fold increase in peak concentration levels of both hgh and igf-1. Also a bigger dose will not increase the supression time or peak times.
In regard to timining of hgh injections this would mean that the best time to inject your hgh is just before you go to sleep. That way you will still get your largest endogenous pulse, which accours about 2 hours after you go to sleep, and when that pulse is over, a little later in about 4 hours your hgh levelse will reach another peak from the hgh administration. The supression of your own hgh will be finished by the time you do your next injection the day after at the same time, so you will still get the deep sleep pulse the night after.
By taking your shots am you will supress all endogenous production of hgh the following nigth. Forget thinking that going up taking your shot 4am or 7am will help you not supress your own production, you will be shut down for 24 hours.
By doing several injections each day like am/afternoon you will shut down your own production completely.
So does this mean that it is best to inject at night? I keep hearing conflicts views about what is safe. Many people are saying inject in the morning but according to this study that will cause shut down.