Research Use Only - Not for human consumption. 18+ only.
Research CompoundGrowth Hormone SecretagoguesSubcutaneous

GHRP-6

Also known as: Growth Hormone Releasing Peptide-6

GHRP-6 is a potent stimulator of natural growth hormone secretion. It also increases appetite and aids in energy metabolism, making it popular for building muscle mass and strength.

Research Status

Research Compound

Research compound

For research purposes only. Not approved for human use. Not medical advice.

Research Areas

Increases GH and IGF-1 levels
Stimulates appetite
Promotes muscle growth
Enhances fat metabolism
Improves recovery
Increases strength

Side Effects

Increased appetite
CommonMild

Occurs within 30–60 minutes of injection and persists for 2–4 hours. This is a direct result of ghrelin receptor activation. Manage by timing injections away from meals or planning caloric intake accordingly. Some users find this beneficial for bulking phases; others find it problematic.

Carpal tunnel syndrome (CTS)
UncommonModerate

Reported with chronic GH elevation from secretagogues. Results from fluid retention and nerve compression in the wrist. Onset is typically gradual (weeks to months). Manage with wrist splinting, NSAIDs, or dose reduction. Discontinue if symptoms worsen.

Numbness or tingling in extremities (paresthesia)
UncommonMild

Related to fluid retention and nerve compression. Usually resolves with dose reduction or cycling off the peptide. Monitor for progression to carpal tunnel syndrome.

Joint or muscle pain
UncommonMild

May result from rapid GH elevation and increased IGF-1 signalling. Typically mild and self-resolving. Manage with rest, NSAIDs, or dose adjustment.

Headache
UncommonMild

Reported in some users, possibly related to fluid retention or rapid GH elevation. Usually mild and transient. Manage with hydration and over-the-counter analgesics.

Flushing or facial redness
UncommonMild

Occurs shortly after injection, likely due to vasodilation from GH and cortisol release. Resolves within 30–60 minutes. No intervention required.

Injection site reactions (redness, itching, swelling)
UncommonMild

Local inflammatory response at the injection site. Minimise by rotating sites, using sterile technique, and allowing the solution to reach room temperature before injection. Apply ice if swelling occurs.

Nausea
RareMild

Reported occasionally, possibly related to rapid GH elevation or injection timing. Usually resolves within 1–2 hours. Inject on an empty stomach to reduce risk.

Tachyphylaxis (reduced GH response over time)
CommonModerate

Chronic GHRP-6 use leads to receptor desensitisation, reducing GH response magnitude. Manage by cycling the peptide (e.g., 5 days on, 2 days off, or 8 weeks on, 4 weeks off). Alternating with other secretagogues (e.g., GHRP-2, ipamorelin) may help maintain responsiveness.

Elevated cortisol
UncommonModerate

GHRP-6 stimulates cortisol release alongside GH. Chronic elevation may impair recovery and increase catabolic effects. Monitor cortisol levels if using long-term. Manage with adequate sleep, stress reduction, and cycling.

Elevated prolactin
UncommonMild

GHRP-6 stimulates prolactin release, though less potently than GH. Rarely clinically significant at research doses. Monitor if using high doses or long-term.

Lipodystrophy (localised fat loss or thickening)
UncommonMild

Results from repeated injections at the same site. Prevent by rotating injection sites systematically. Lipodystrophy is usually reversible if sites are rotated.

Hypoglycaemia (low blood sugar)
RareModerate

GH is counter-regulatory and typically raises blood glucose, but some users report transient hypoglycaemia, especially if fasted. Monitor blood glucose if diabetic or sensitive to hypoglycaemia. Inject with a small carbohydrate source available.

Dosing Reference

ParameterValue
Dose range100-200 mcg
Frequency2-3x daily
TimingPost-workout, before bed, upon waking (fasted)
RouteSubcutaneous

Strong appetite increase. Best taken away from meals for maximum GH response.

Research disclaimer

Figures drawn from published research literature and community logs. Not clinical recommendations. Consult a qualified professional. Research use only.

Reconstitution Guide

Do not use saline or bacteriostatic saline — use only bacteriostatic water for reconstitution

Do not shake the vial vigorously; gentle swirling prevents peptide degradation

Discard immediately if the solution appears cloudy, discolored, or contains visible particles

Use within 30 days of reconstitution when stored at 2–8°C

Do not freeze the reconstituted solution; freezing may denature the peptide

Use the PeptideVolt reconstitution calculator for your exact concentration

Use the PeptideVolt reconstitution calculator for your exact concentration

Molecular and Pharmacological Data

Molecular weight873
Half-life30 minutes (plasma); GH response lasts 2–4 hours
SequenceHis-D-Trp-Ala-Trp-D-Phe-Lys-NH2

GHRP-6 is a synthetic hexapeptide that acts as a ghrelin receptor agonist, binding to growth hormone secretagogue receptors (GHS-R1a) on pituitary somatotroph cells and hypothalamic neurons. This stimulates the release of endogenous growth hormone in a pulsatile manner, mimicking the body's natural GH secretion pattern. GHRP-6 also increases appetite through ghrelin pathway activation and enhances metabolic rate, supporting muscle protein synthesis and lipolysis.

GHS-R1a (Growth Hormone Secretagogue Receptor) Activation

GHRP-6 binds to GHS-R1a receptors on anterior pituitary somatotrophs, triggering calcium mobilisation and GH release. This pathway is distinct from GHRH signalling and can work synergistically with endogenous GHRH.

Ghrelin Signalling

GHRP-6 mimics ghrelin's orexigenic (appetite-stimulating) effects through the same receptor, increasing hunger signals and food intake — a key side effect of this peptide.

Hypothalamic-Pituitary-Somatotroph Axis

GHRP-6 enhances GH pulsatility by increasing the frequency and amplitude of GH secretory episodes, particularly when administered during the fasted state or before sleep.

  • GHRP-6 is a non-natural amino acid hexapeptide with D-amino acid substitutions to resist enzymatic degradation
  • It stimulates GH release independent of somatostatin inhibition, making it effective even in the presence of somatostatin
  • Peak GH response occurs 30–60 minutes post-injection; fasted state enhances response magnitude
  • Chronic use may lead to tachyphylaxis (reduced responsiveness) if not cycled appropriately
  • GHRP-6 also stimulates prolactin and cortisol release, though to a lesser degree than GH

Track your GHRP-6 research

Free account. No credit card required.

Start Free

Browse the Research Library

40+ peptide profiles with mechanism summaries, dosing data, and reconstitution guides.

View all peptides

Research Use Only. All content on this page is provided for informational and educational purposes related to scientific research. GHRP-6 is not approved for human use by the FDA or any equivalent regulatory body. This is not medical advice. Do not use any substance discussed here for therapeutic, diagnostic, or preventative purposes. Consult a qualified healthcare professional before making any health-related decisions. The Peptide Volt does not endorse the use of any research chemicals. 18+ only.