Classic GH Stack

The Classic GH Stack — CJC-1295 paired with Ipamorelin — is the most clinically documented peptide combination in regenerative medicine and the gold standard for growth hormone optimization through secretagogues. It earns a synergy score of 95/100 because the two peptides operate through entirely separate receptor systems that, when activated together, produce GH output greater than the sum of either alone. CJC-1295 is a GHRH (growth hormone-releasing hormone) analog. It binds to GHRH receptors on pituitary somatotroph cells, providing the primary signal for GH synthesis and release. Modified from native GHRH with a longer half-life, CJC-1295 (without DAC) produces a physiologically timed GH pulse when administered. It primes the pituitary, loading it with GH ready for release. Ipamorelin is a GHRP (growth hormone-releasing peptide) — specifically a ghrelin receptor agonist. It stimulates GH release through the ghrelin pathway, entirely independent of the GHRH receptor that CJC-1295 activates. Ipamorelin is uniquely selective: it stimulates GH release without significantly affecting cortisol, prolactin, ACTH, or appetite — a cleaner profile than other GHRPs like GHRP-2 or GHRP-6. When administered together, CJC-1295 prepares the pituitary (GHRH pathway) and Ipamorelin triggers the release (ghrelin pathway). Research on co-administration of GHRH analogs and GHRPs consistently shows GH output 200–300% greater than either compound alone, approaching supraphysiological levels from purely secretagogue-driven mechanisms — without exogenous GH. Administered before bed on an empty stomach, this stack amplifies the natural nocturnal GH pulse. Users typically report improved sleep quality within the first week, enhanced body composition (increased lean mass, reduced fat) within 4–8 weeks, and improved recovery and skin quality within 8–12 weeks. Standard cycle: 12 weeks on, 4 weeks off. Baseline and mid-cycle IGF-1 and fasting glucose monitoring is recommended.