In the last decade the usage of growth hormone and IGF-LR3 became common among bodybuilders, anti-agers and fitness enthusiasts.
In the beginning people where cautious because they feared side-effects after continuous growth hormone use. And the price was very high also.
Nowadays we see that most discussion-boards have a peptide section. And it’s no longer restricted to GH and IGF. People that used the cadaver extracted GH, will tell you mixed GH is much more effective than the synthesized version. So people started to experiment with GH releasers aka secratogogues.
Research has overwhelming shown that when administering one GH peptide from each class in conjunction (GHRH + GHRP), a synergist effect is achieved, eliciting superior results compared to using just one alone. For this reason, it has been common practice to combine both a GHRH and a GHRP for years. This practice is well-founded, as it is backed not only by credible science, but by a massive amount of anecdotal evidence in terms of both personal experience and user blood work.
Because some bodybuilders wanted to mimic natural GH release they experiment with pulsing their dose in 2 or 3 injects per day. There are many different injection protocols with many different injection frequencies for GH releasers and combinations there off.