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GHRP-6: HGH / Somatropin research guide
In short: GHRP-6, foundational hexapeptide GHS-R1a/CD36 dual agonist and original growth hormone releasing peptide with potent appetite-stimulating properties. It is studied in preclinical (cell and animal) research and is supplied strictly for laboratory use, not for human or clinical use.
Not medical advice. GHRP-6 is a research compound. This guide does not provide dosing, diagnosis, therapy recommendations, or claims about effects in humans.
GHRP-6 at a glance
What to know first
Details and limits sit in the sections below. Research use only.
What GHRP-6 is
GHRP-6 is the original growth hormone releasing peptide - the hexapeptide whose discovery in the 1980s first revealed that the ghrelin receptor was a separate, GH-releasing pathway from GHRH.
One-paragraph overview from our research datasheet. Still scientific, but faster to read than the full mechanism list below.
GHRP-6, foundational hexapeptide GHS-R1a/CD36 dual agonist and original growth hormone releasing peptide with potent appetite-stimulating properties.
Research contexts
Peer-reviewed papers discuss GHRP-6 in specific lab settings. The points below reflect research questions, not health claims.
Research vs. personal use: Literature describes experiments in cells and animals. That is distinct from real-world use. Our products are for laboratory research only.
Typical study contexts
Why HGH / Somatropin research matters
Growth-hormone axis peptides are studied for GH/IGF signalling in animals and cells. Focus stays on endocrine biology, not prescribing.
Mechanisms (technical review)
Our datasheet lists mechanistic themes from preclinical work. These are research endpoints, not health claims.
Lab handling & preparation
Common Questions People Are Asking
What is GHRP-6?
GHRP-6 is the original growth hormone releasing peptide - a synthetic six-amino-acid peptide that binds the ghrelin receptor (GHS-R1a) on the pituitary to trigger a pulse of the body's own growth hormone. It also acts on the CD36 scavenger receptor and is the strongest appetite stimulant of the GHRP family. Supplied as a lyophilised research-grade powder for laboratory use only.
Why does GHRP-6 cause hunger?
GHRP-6 is an agonist at the ghrelin receptor GHS-R1a, which is found not only on pituitary somatotrophs (where it releases GH) but also on hypothalamic NPY/AgRP neurons in the arcuate nucleus that regulate appetite. Activating those hypothalamic receptors mimics what natural ghrelin does after a period of fasting - it signals hunger.
What is the difference between GHRP-6 and GHRP-2?
Both are hexapeptide ghrelin-receptor agonists. GHRP-6 is the original and the most orexigenic, with a strong hunger signal; GHRP-2 releases more growth hormone per dose with a milder appetite effect. Researchers choose GHRP-6 when the appetite response is wanted and GHRP-2 when GH output without strong hunger is the goal.
How does GHRP-6 compare with hexarelin and ipamorelin?
All are ghrelin-receptor agonists. GHRP-6 is the original and most orexigenic; hexarelin is the most potent GH releaser and has the clearest CD36 cardiac profile; ipamorelin is the cleanest and most selective, with minimal cortisol, prolactin, or appetite effect. GHRP-6 sits at the "strong hunger, dual receptor" end of the spectrum.
What is the half-life of GHRP-6?
A human pharmacokinetic study reported a biexponential disposition: a short distribution half-life of about 7.6 minutes and an elimination half-life of roughly 2.5 hours after intravenous dosing. The functional growth-hormone effect after subcutaneous injection is short, with the GH peak occurring within about 15-30 minutes.
Can GHRP-6 be combined with GHRH analogs?
Yes - this is a standard research stack. GHRP-6 plus a GHRH analogue such as sermorelin or CJC-1295 produces supra-additive GH release because the two peptides activate different receptors (the ghrelin receptor and the GHRH receptor) that converge on GH exocytosis.
What is the CD36 cardioprotective effect?
Beyond the pituitary, GHRP-6 binds the CD36 scavenger receptor on heart muscle cells. In preclinical infarction models this activation has been associated with reduced myocardial damage and improved post-infarct remodelling, an effect that is independent of growth-hormone release. These are animal-model findings reported for research context only.
How should GHRP-6 be stored?
Keep the lyophilised powder frozen at −20 °C. After reconstitution with bacteriostatic water, refrigerate at 1-6 °C and protect from light. GHRP-6 is fairly stable in solution within the normal peptide-handling window.
Is this page medical advice? Can I use GHRP-6 for my health?
No, and no. This article is educational only. We do not provide dosing, medical recommendations, or health claims. Our products are sold strictly for laboratory research, not for personal use of any kind.
Where do I find GHRP-6 specs, purity certificates and pricing?
Open the shop listing via “View product details.” There you will see batch specs, the Certificate of Analysis (COA), concentration, purity grade, and available SKUs with current pricing.
Related peptide guides
Other compounds researchers often read about alongside GHRP-6.
Scientific sources & further reading
Primary literature and registries for GHRP-6, plus mainstream coverage of the peptide category. Research use only - not medical advice.
Databases & literature:
Peptides in the news:
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Also known as: Growth Hormone Releasing Peptide-6, Growth Hormone Releasing Hexapeptide, SKF-110679, His-D-Trp-Ala-Trp-D-Phe-Lys-NH2
PRECISION. PURITY. PERFORMANCE.
Research peptides at >99% HPLC-verified purity, third-party tested by Janoshik Analytical & Freedom Diagnostics, with Certificates of Analysis published per released batch. Supplied strictly for laboratory research use.
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