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Where These Numbers Come From
GHRP-6 has more human clinical data than many research peptides, as it was extensively studied in endocrinology research.
GHRP-6 stimulates GH secretion both in vitro and in vivo through phosphatidylinositol turnover in pituitary somatotroph cells (Lei & Bhargava, 1995). Research established that GHRP-6 requires endogenous hypothalamic GHRH for maximal GH stimulation, explaining the synergistic effects when co-administered with GHRH analogs (Pandya et al., 1998).
Beyond GH release, GHRP-6 has demonstrated cardioprotective and cytoprotective properties independent of GH pathways, acting through GH secretagogue receptor-mediated mechanisms (Berlanga-Acosta et al., 2017).
GHRP-6 activates the ghrelin receptor (GHS-R1a), the same receptor stimulated by endogenous ghrelin. Central administration activates appetite centers in the hypothalamus, including orexin-containing neurons (Wren et al., 2001). The 100 mcg per injection dose is considered near the saturation dose — higher amounts don't meaningfully increase per-bolus GH output.
Stacking Protocols
Community-documented stacking protocols. Doses reflect community-reported and trial-described protocols, not a recommended regimen.
Stack GHRP-6 Dose Partner Partner Dose Purpose CJC-1295 100 mcg SC 2-3x/day CJC-1295 no DAC 100 mcg same syringe Gold standard GH stack Ipamorelin 100 mcg SC 2-3x/day Ipamorelin 200-300 mcg Broader GHRP receptor engagement MK-677 100 mcg SC 2-3x/day MK-677 20-25 mg oral PM Sustained GH via different half-lives BPC-157 + CJC-1295 100 mcg SC 2-3x/day BPC-157 + CJC-1295 250 mcg + 100 mcg Bulking: GH + appetite + gut health
GHRP-6 and GHRH analogs can be combined in the same syringe. Both require empty stomach. Each GHRP has a per-injection ceiling — stacking doesn't bypass individual receptor saturation.
Side Effects & Safety
Intense hunger — 15-30 minutes post-injection, lasts 30-60 minutes. Most pronounced of all GHRPs Water retention — mild, GH-mediated fluid retention in hands/feet Cortisol elevation — dose-dependent, more significant than ipamorelin or GHRP-2 Prolactin elevation — mild at standard doses; more pronounced above 200 mcg Blood sugar effects — GH opposes insulin action; trial data document elevated blood glucose as a GH-mediated effect, with diabetic and insulin-resistant subjects identified as a higher-risk population in endocrinology research Reduced GH response — prolonged continuous use may attenuate the ghrelin-receptor response; community sources cycle to manage this Cancer caution — elevated GH/IGF-1 has raised theoretical oncological concern in the literature; GH-secretagogue trial protocols have systematically excluded subjects with active malignancy
mg to Units Conversion
On a standard 100-unit insulin syringe, each "unit" equals 0.01 mL (so 100 units = 1 mL). Once GHRP-6 is reconstituted, the conversion from a target dose to syringe units depends on the chosen dilution.
The two reconstitution ratios most often described in community protocols are below.
Reconstitution A: 5 mg vial + 2 mL BAC water (2.5 mg/mL) — the standard dilution from the Quick Reference above.
Dose (mcg) Volume (mL) Units (insulin syringe) 50 mcg 0.02 mL 2 units 100 mcg 0.04 mL 4 units 150 mcg 0.06 mL 6 units 200 mcg 0.08 mL 8 units
Reconstitution B: 5 mg vial + 5 mL BAC water (1 mg/mL) — more BAC water for larger, easier-to-measure draws.
Dose (mcg) Volume (mL) Units (insulin syringe) 50 mcg 0.05 mL 5 units 100 mcg 0.1 mL 10 units 150 mcg 0.15 mL 15 units 200 mcg 0.2 mL 20 units
These conversions reflect the dilutions documented in community reconstitution protocols. They report how the math is described, not a recommended dosing schedule.