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

GHRP-4

Growth hormone secretagogue (GHS) in the research stage. GHRP-4 is a synthetic hexapeptide that stimulates growth hormone (GH) release from the anterior pituitary gland. Limited clinical data available; primarily used in research settings.

Research Status

Research Compound

Early Research

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

Research Areas

Stimulates growth hormone secretion
May enhance muscle protein synthesis
Supports recovery from exercise
May improve body composition
Potential metabolic support

Side Effects

Increased appetite
CommonMild

GHS compounds stimulate ghrelin signaling, which increases hunger. This typically resolves within hours of injection. Manage by timing injections away from meals or eating small, protein-rich snacks.

Transient flushing or warmth
CommonMild

Mild facial flushing or sensation of warmth may occur within 5-15 minutes of injection. Usually resolves within 30 minutes. No intervention required.

Injection site reactions (redness, mild swelling)
UncommonMild

Local erythema or minor edema at the injection site may occur, particularly if sites are not rotated adequately. Prevent by rotating injection sites with each dose. Apply ice if needed.

Headache
UncommonMild

Mild headaches have been reported in some users, possibly related to rapid GH elevation. Usually self-resolving. Ensure adequate hydration.

Carpal tunnel syndrome symptoms
RareModerate

Prolonged GH elevation may increase risk of carpal tunnel syndrome or exacerbate existing symptoms due to soft tissue expansion. Monitor for wrist pain or numbness. Discontinue if symptoms develop and seek medical evaluation.

Tachyphylaxis (reduced GH response over time)
CommonModerate

Continuous daily dosing may lead to desensitization of GHS-R1a receptors, reducing GH secretion response. Manage by implementing cycling protocols (e.g., 5 days on, 2 days off) or varying injection timing.

Joint or muscle pain
UncommonMild

Some users report mild joint or muscle discomfort, possibly related to increased GH and IGF-1 levels. Usually mild and self-resolving. Ensure adequate rest and recovery.

Water retention
UncommonMild

Elevated GH may increase water retention, leading to mild bloating or weight gain. Typically resolves with adequate hydration and electrolyte balance.

Hyperglycemia or glucose dysregulation
RareModerate

GH has counter-insulin effects; elevated GH may impair glucose tolerance in susceptible individuals. Monitor blood glucose if you have diabetes or metabolic risk factors. Discontinue if significant hyperglycemia develops.

Dizziness or lightheadedness
RareMild

Transient dizziness may occur shortly after injection. Sit or lie down if this occurs. Usually resolves within minutes.

Dosing Reference

ParameterValue
Dose range100-200 mcg
Frequency1-3x daily
TimingBefore meals or before bed
RouteSubcutaneous

Subcutaneous injection. Research compound. Start at lower end (100 mcg) and assess response before increasing. Timing relative to meals may influence GH release kinetics. For research purposes only.

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

GHRP-4 is a synthetic hexapeptide that acts as a ghrelin receptor (GHS-R1a) agonist on somatotroph cells in the anterior pituitary gland. It stimulates the release of endogenous growth hormone in a dose-dependent manner, with effects that may be enhanced when combined with GHRH (growth hormone-releasing hormone). The peptide works independently of somatostatin inhibition, allowing for sustained GH secretion.

GHS-R1a (Ghrelin Receptor) Signaling

GHRP-4 binds to the ghrelin receptor on pituitary somatotrophs, activating intracellular signaling cascades (IP3/DAG pathway) that depolarize the cell membrane and trigger GH exocytosis.

Hypothalamic-Pituitary-Somatotroph Axis

Stimulates GH release without directly inhibiting somatostatin, allowing for pulsatile GH secretion patterns that may more closely mimic endogenous rhythms.

  • GHRP-4 is a hexapeptide GHS with oral bioavailability in some studies, though SC injection is standard for research
  • GH release is dose-dependent and occurs within 15-30 minutes of injection
  • Effects are most pronounced in the fasted state and during sleep
  • Tachyphylaxis (reduced response over time) may occur with continuous dosing; cycling protocols are often recommended in research

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Research Use Only. All content on this page is provided for informational and educational purposes related to scientific research. GHRP-4 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.