A widely referenced review reports that GHK-Cu raises growth factors such as VEGF and is associated with larger follicles and better hair-transplant survival, though its author has a commercial affiliation, so it should be read as a mechanistic review rather than clinical proof (Pickart, 2008, DOI)
Int J Fertil Steril 2022
Efficacy and safety of setmelanotide, an mc4r agonist, in individuals with severe obesity due to lepr or pomc deficiency: single-arm, open-label, multicentre, phase 3 trials
Ipamorelin shows minimal effect No appetite stimulation: Unlike ghrelin itself, Ipamorelin does not significantly activate hunger pathways in published studies Published Research on Ipamorelin Study Model Key Finding Raun et al., 1998 (Eur J Endocrinol) Swine/Human Selective GH release without cortisol/prolactin elevation Johansen et al., 1999 Human (Phase I/II) Dose-response relationship with no significant adverse effects Bowers et al., 2004 Review Comparative analysis of GHRP selectivity profiles Head-to-Head Comparison Research Factor CJC-1295 Ipamorelin Receptor Target GHRH-R GHS-R1a (Ghrelin receptor) Signaling Pathway cAMP / PKA PLC / Calcium GH Release Pattern Amplifies natural pulsatile release Induces acute GH pulse Cortisol Impact Minimal Minimal Prolactin Impact Minimal Minimal Research Focus Sustained GH elevation models Selective/clean GH pulse models Typical Research Duration No DAC: 30min half-life / DAC: days ~2 hour half-life Why Researchers Study Them Together The combination of a GHRH analog (CJC-1295) with a GHRP (Ipamorelin) is well-documented in published literature
In a 12-week, randomized, placebo-controlled trial in which 50,000 IUs (1,250 mcg) vitamin D was given weekly to 30 overweight women (age 1849) with PCOS and vitamin D deficiency, supplementation led to reduced unwanted hair growth and male hormone levels
