Muscle & recovery
GHRP-2, simplified.
Also called Pralmorelin
Human studiesA growth hormone releasing peptide that mimics ghrelin, the hunger hormone, to trigger a strong pulse of your own growth hormone.
- Size
- 6 amino acids
- How it is taken
- Injection
- Status
- Research compound (diagnostic use in Japan)
- Available sizes
- Vials: 5 mg, 10 mg
What is it?
GHRP-2 switches on the ghrelin receptor in the brain and pituitary, which releases growth hormone. It is stronger than ipamorelin but less selective, so it also nudges up cortisol and prolactin.
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What studies show
- In peopleIn people, single doses reliably raise growth hormone levels, which is why Japan uses it as a diagnostic test.
- In peopleIt also raises cortisol and prolactin, and increases hunger.
What we don’t know yet
- Whether repeated use builds muscle or improves recovery in healthy adults.
- Long-term safety.
Side effects and cautions
- Increased hunger, water retention and tingling hands.
- Can raise blood sugar.
- Banned in sport by WADA.
Is it legal?
Not FDA-approved.
Dosage & schedule evidence
How to read published schedules
Third-party protocol charts are not established clinical dosing standards. The evidence for safe and effective human dose, frequency, and duration may be limited or absent.
| Measurement | Meaning |
|---|---|
| 1 mg | 1,000 mcg (mass) |
| 100 U-100 units | 1 mL (volume, not dose) |
Read third-party published protocols ↗ for context. North Star does not validate these schedules.
Consult your doctor before considering any peptide for personal use. Educational only, not administration guidance.
Common questions
What is GHRP-2?
A growth hormone releasing peptide that mimics ghrelin, the hunger hormone, to trigger a strong pulse of your own growth hormone. GHRP-2 switches on the ghrelin receptor in the brain and pituitary, which releases growth hormone. It is stronger than ipamorelin but less selective, so it also nudges up cortisol and prolactin.
What does the research say about GHRP-2?
In people, single doses reliably raise growth hormone levels, which is why Japan uses it as a diagnostic test. It also raises cortisol and prolactin, and increases hunger.
Is GHRP-2 FDA approved?
Not FDA-approved.
What are the side effects of GHRP-2?
Increased hunger, water retention and tingling hands. Can raise blood sugar. Banned in sport by WADA.
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This page explains published research in plain language. It is not medical advice, a diagnosis, or a recommendation to take anything, and it does not give dosing. Most peptides here are not FDA-approved, and products sold online vary widely in purity. Rules around peptides are changing, so check the current status and talk with a licensed clinician before starting anything. Last reviewed 2026-10-19.