GHRP-2: uses, dosing & the facts

A growth hormone releasing peptide-2 that strongly stimulates growth hormone release. Can increase cortisol and prolactin, unlike Ipamorelin. This is an evidence-graded reference — what it is, what it's used for, typical reported dosing, half-life, side effects, and how to track it. It is educational, not medical advice or a recommendation to use a research compound.

By OptiPin Editorial·Last updated July 2026

Status

Research use only · not FDA-approved. Reported dosing below reflects community-discussed patterns, presented for information only — not a dose recommendation. For the US regulatory picture on research peptides, see the 2026 FDA compounding status.

Class

GHRP · GH secretagogue

Used for

Strong growth hormone stimulation

Half-life

Approximately 30 min…

Status

Research use only

TL;DR

• GHRP-2 — GHRP · GH secretagogue. A growth hormone releasing peptide-2 that strongly stimulates growth hormone release.
• Commonly used for strong growth hormone stimulation, muscle growth, fat loss.
• Half-life: Approximately 30 minutes.
• Status: Research use only · not FDA-approved — an educational reference, not a dose protocol or sourcing advice.

What GHRP-2 is

A growth hormone releasing peptide-2 that strongly stimulates growth hormone release. Can increase cortisol and prolactin, unlike Ipamorelin.

What GHRP-2 is used for

• Strong growth hormone stimulation
• Muscle growth
• Fat loss
• Improved recovery
• Enhanced athletic performance
• Increased appetite (for bulking)

These are reported/community uses, not proven clinical outcomes. Most research peptides have limited human trial data behind such claims.

Typical reported dosing

Injectable

100-200mcg injected subcutaneously 2-3x daily on empty stomach

Presented as commonly-reported patterns for information only — not a dose recommendation. GHRP-2 dosing is a decision for a qualified clinician.

Reconstitution

Reconstitute with bacteriostatic water. Usually comes as 2-5mg vial. The arithmetic is the same for any peptide: concentration = vial mg ÷ water mL, and on a U-100 syringe 100 units = 1 mL. Compute your own vial with the reconstitution calculator.

Half-life & cycling

Half-life: Approximately 30 minutes. Half-life drives dosing frequency and how quickly the compound clears — see it plotted on the half-life visualizer.

Cycling

Typical cycles: 8-12 weeks on, 4 weeks off. Often stacked with GHRH peptides for synergistic effects.

Side effects & warnings

• Significant hunger increase (can be used for bulking)
• Possible cortisol and prolactin elevation
• Water retention possible
• Some acne in sensitive individuals

Strong appetite stimulation - may not be ideal for cutting phases. Can raise cortisol and prolactin. Monitor if using for extended periods. Take on empty stomach.

Not a prescription, a dose, or a sourcing guide. GHRP-2 is a research compound; safety and efficacy in humans are not fully established, and research-grade material has no guarantee of purity, sterility, or stated strength. OptiPin is a tracking tool and does not recommend using research chemicals. Discuss any peptide with a qualified clinician.

Tracking GHRP-2 in OptiPin

If you're tracking a GHRP-2 protocol, OptiPin logs each dose with reminders and site rotation, charts the outcome you care about over your dose timeline, keeps per-vial inventory with runout warnings, and (where relevant) does the reconstitution math — all on-device, no account.

Track it properly

Log doses, outcomes & vials in OptiPin

Reminders, outcome-over-dose charts, vial runout warnings, and built-in reconstitution math — all on-device.

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FAQ

What is GHRP-2?

A growth hormone releasing peptide-2 that strongly stimulates growth hormone release. Can increase cortisol and prolactin, unlike Ipamorelin.

What is GHRP-2 used for?

Commonly discussed uses include: strong growth hormone stimulation, muscle growth, fat loss, improved recovery, enhanced athletic performance, increased appetite (for bulking). These are reported uses, not proven outcomes or a recommendation.

How is GHRP-2 dosed?

Commonly reported dosing: Injectable — 100-200mcg injected subcutaneously 2-3x daily on empty stomach. This reflects patterns discussed in the community and is presented for information only, not as a dose recommendation — GHRP-2 is not an approved medicine and dosing should involve a qualified clinician.

How do you reconstitute GHRP-2?

Reconstitute with bacteriostatic water. Usually comes as 2-5mg vial. On a U-100 syringe, 100 units = 1 mL. Concentrations vary by vial, so compute from your own vial with a reconstitution calculator.

What is GHRP-2's half-life?

Approximately 30 minutes. Half-life shapes how often it is dosed and how quickly it clears.

What are GHRP-2's side effects?

Reported effects include: significant hunger increase (can be used for bulking), possible cortisol and prolactin elevation, water retention possible, some acne in sensitive individuals. Because it is a research compound, its safety profile is not fully characterized; discuss risks with a clinician.

Educational only, not medical advice. GHRP-2 is a research compound and is not an approved medicine for the uses described. OptiPin is a tracking tool and does not provide dosing or treatment advice. Discuss any peptide with a qualified clinician.

Evidence & further reading

Search the peer-reviewed literature for GHRP-2 on PubMed (entry point to the primary evidence base, not a specific citation).
GHRP-2 on ClinicalTrials.gov — registered human trials, if any.
US FDA / 503A compounding status of research peptides (2026).
OptiPin peptides guide — categories, evidence grading, and how to run a protocol honestly.

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