Understand the source comparison
GHRP-6 Acetate Muscle Growth Complete Guide 2026: Formulation Comparison
GHRP-6 Acetate 20–40 min Moderate GHS-R1a affinity; minimal cortisol/prolactin cross-reactivity Strong ghrelin mimicry increases hunger 60–90 min post-dose Research protocols prioritising clean GH release with controlled feeding windows GHRP-2 15–30 min High G
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- GHRP-6 Acetate
- 20–40 min
- Moderate GHS-R1a affinity; minimal cortisol/prolactin cross-reactivity
- Strong ghrelin mimicry increases hunger 60–90 min post-dose
- Research protocols prioritising clean GH release with controlled feeding windows
- GHRP-2
- 15–30 min
- High GHS-R1a affinity; moderate cortisol elevation at doses >200mcg
- Moderate appetite increase
- Studies requiring faster GH peak with acceptable cortisol trade-off
- Ipamorelin
- 30–45 min
- High GHS-R1a selectivity; negligible cortisol/prolactin effect
- Minimal appetite stimulation
- Long-term protocols where cortisol elevation or appetite disruption is undesirable
- Hexarelin
- 10–20 min
- Highest GHS-R1a affinity; significant desensitisation risk with chronic use
- Strong appetite increase
- Short-duration trials (<4 weeks) requiring maximal GH amplitude