Mechanism Comparison Factor CJC-1295 + Ipamorelin HGH (Somatropin) Approach Stimulates endogenous GH production Replaces GH with exogenous protein Pituitary involvement Required pituitary manufactures and releases GH Bypassed GH delivered directly Feedback loop Preserved somatostatin still regulates GH levels Suppressed exogenous GH downregulates natural production GH release pattern Pulsatile, mimics natural circadian rhythm Spike-and-decline, non-physiological Receptor targets GHRH-R (CJC-1295) + GHS-R1a (Ipamorelin) GH receptor directly (no pituitary signaling) Molecular size CJC-1295: 29 AA (~3,368 Da) / Ipamorelin: 5 AA (~712 Da) 191 amino acids (~22,124 Da) The Pituitary Feedback Question This is arguably the most important mechanistic difference for researchers to understand
Drawing 5 extra units does not give you an extra 0.25 mg like it would with a 5 mg/mL vial
Both medications can cause weight loss and gastrointestinal side effects, which may be additive when used together
GHK-Cu influences follicle cycling through multiple mechanisms including stimulation of VEGF and hepatocyte growth factor (HGF) secretion from hair follicle cells, with research demonstrating that advanced delivery formulations achieve ~3-fold enhancement of GHK-Cu penetration while retaining biological function and stimulating dermal papilla cells at the base of follicles
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Your doctor will recommend it only if the benefits outweigh the risks