GHRP-2 vs Hexarelin
A detailed comparison to help you understand the differences and choose the right peptide for your research goals.
GHRP-2
Growth Hormone Releasing Peptide 2 (GHRP-2) is considered one of the most potent GHRPs available. It provides strong GH release with moderate hunger increase compared to GHRP-6.
Full details →Hexarelin
Hexarelin is a potent synthetic hexapeptide growth hormone secretagogue. It provides the strongest GH release among GHRPs but is associated with rapid desensitization of receptors.
Full details →Side-by-Side Comparison
| Aspect | GHRP-2 | Hexarelin |
|---|---|---|
| Dose Range | 100 mcg–300 mcg | 100 mcg–300 mcg |
| Frequency | 3x daily | 2x daily |
| Cycle Length | 8–12 weeks | 8–12 weeks |
| Route | subcutaneous | subcutaneous |
| Mechanism | Binds to the ghrelin receptor (GHS-R) to stimulate GH release from the pituitary. Also has some direct effects on the hypothalamus. Causes less appetite increase than GHRP-6. | Acts as a ghrelin mimetic with high potency at the GHS receptor. Provides powerful GH release but receptor desensitization occurs faster than with other GHRPs, requiring cycling. |
| Typical Dosage | Typical dosing: 100-300mcg administered 2-3 times daily. Often stacked with GHRH peptides for enhanced GH release. | Typical dosing: 100-200mcg administered 2-3 times daily for 4-6 weeks, followed by an equal off period to allow receptor resensitization. |
| Administration | Subcutaneous injection on an empty stomach. Can be used at bedtime to enhance natural GH pulse during sleep. | Subcutaneous injection. Cycling is essential to maintain effectiveness. Often used in short bursts rather than continuous protocols. |
| Side Effects | Moderate hunger increase, water retention, potential prolactin and cortisol elevation (less than GHRP-6), tingling sensations. | Water retention, cortisol and prolactin increase, hunger (moderate), tingling, and potential blood pressure effects. |
| Best For |
What They Have in Common
GHRP-2, Hexarelin are both commonly used for:
Key Differences
Unique to GHRP-2:
Unique to Hexarelin:
Which Has Stronger Evidence?
| Goal | GHRP-2 | Hexarelin |
|---|---|---|
| Muscle Growth | high | high |
Key Studies
GHRP-2
- On the road of dried blood spot sampling for antidoping tests: Detection of GHRP-2 abuse.
Drug testing and analysis, 2021
- Effects of GHRP-2 and Cysteamine Administration on Growth Performance, Somatotropic Axis Hormone and Muscle Protein Deposition in Yaks (Bos grunniens) with Growth Retardation.
PloS one, 2016
- Ghrelin receptor agonist, GHRP-2, produces antinociceptive effects at the supraspinal level via the opioid receptor in mice.
Peptides, 2014
Hexarelin
- Hexarelin promotes the survival of retinal ganglion cells after optic nerve transection.
Indian journal of pharmacology, 2026
- Hexarelin alleviates apoptosis on ischemic acute kidney injury via MDM2/p53 pathway.
European journal of medical research, 2023
- Hexarelin attenuates abdominal aortic aneurysm formation by inhibiting SMC phenotype switch and inflammasome activation.
Microvascular research, 2022
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