Hex is a GHRP, causing your body to release its own gh from pathways independant to that of GHRH. Hex is one of the most powerful GHRP's, illiciting the largest gh spike in comparison. The body can become desensitized to Hex at a much quicker rate than other GHRP's, with some GHRP's never affecting desensitization to any significant degree. Hex also has the most pronounced side effect of cortisol/prolactin build-up. GHRP's are usually coupled with GHRH for reasons I assume your aware of. Hex is best used as a substitute for GHRP-6,GHRP-2 or ipamorelin, being phased in and out before the body becomes desensitized to it....