Muscle GrowthRecoveryEarly research

Hexarelin

Examorelin

AI explanation

Hexarelin: What It Is and How It Works

Hexarelin is a synthetic peptide—basically a short chain of amino acids designed in a lab—that tells your body to produce more growth hormone. People use it because growth hormone affects everything from muscle building and fat loss to recovery and aging, but your body's natural production decreases over time. Rather than injecting growth hormone directly, hexarelin nudges your pituitary gland to make more on its own, which feels more natural to your system.

Here's how it actually works: Hexarelin acts like a key that fits into specific locks (called ghrelin receptors) in your pituitary gland. When it turns that key, it triggers your pituitary to release a flood of growth hormone into your bloodstream. It's remarkably potent—more effective than similar peptides—because it fits that lock unusually well.

But there's an interesting wrinkle. Your body is smart about not being over-stimulated, so these receptor locks gradually become less responsive to the key if you use it continuously. That's why people typically cycle hexarelin rather than use it every single day. You use it for a while, then take breaks, then use it again—keeping your body's receptors fresh and the peptide effective over the long term.

Dosage Information

Typical Dose

100-200 mcg per dose

Frequency

2-3 times daily maximum — must be cycled to avoid desensitization

Morning or evening

Administration

Subcutaneous injection

Half-Life

60–70 minutes

Notes

Often stacked with CJC-1295 or Sermorelin for synergistic GH release. Due to rapid desensitization use protocols of 4-6 weeks on with 4 weeks off recommended.

Why this matters

Slightly longer than GHRP-2/6 but desensitization can occur with continuous use.

Protocol cycle

4-6 weeks on4 weeks off· Required to prevent rapid desensitization

Dose Calculator

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Concentration: 2,500 mcg/mL

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Where does Hexarelin sit?

See how this peptide compares across all 150 peptides in our database.

Evidence Score

0.12

Clinical trials
0.0035%
Literature
0.0230%
Community
0.0020%
Completeness
0.7515%

Compound Data

Hexarelin structure

Molecular Formula

C47H58N12O6

Molecular Weight

887.00 g/mol

IUPAC Name

(2S)-6-amino-2-[[(2R)-2-[[(2S)-2-[[(2S)-2-[[(2R)-2-[[(2S)-2-amino-3-(1H-imidazol-5-yl)propanoyl]amino]-3-(2-methyl-1H-indol-3-yl)propanoyl]amino]propanoyl]amino]-3-(1H-indol-3-yl)propanoyl]amino]-3-phenylpropanoyl]amino]hexanamide

PubChem CID

6918297

Potential Side Effects

Increased hunger (common — ghrelin receptor effect)Facial flushing (common, transient)Fatigue (uncommon)Water retention (uncommon)Elevated cortisol and prolactin at higher doses (uncommon)
Pep Talk

Hexarelin discussions

Quick Facts

Administration
Subcutaneous injection
Typical Dose
100-200 mcg per dose
Frequency
2-3 times daily maximum — must be cycled to avoid desensitization
References
0 curated + 1 from PubMed
Evidence Score
0.1 / 100

Frequently Asked Questions about Hexarelin

What is Hexarelin?

Hexarelin is a synthetic hexapeptide and one of the most potent growth hormone releasing peptides (GHRPs) developed. It is a ghrelin receptor agonist that produces robust GH release and has demonstrated additional cardioprotective effects independent of GH secretion. Hexarelin has been studied in clinical trials for cardiac protection following myocardial infarction and for GH deficiency making it one of the few GHRPs with a meaningful clinical evidence base beyond animal studies. Its potency exceeds that of GHRP-6 and GHRP-2 but its tendency to cause rapid desensitization limits continuous use.

How does Hexarelin work?

Hexarelin acts as a potent agonist at the ghrelin receptor (GHSR-1a) stimulating GH release from pituitary somatotrophs through a mechanism complementary to GHRH. It also binds to the CD36 scavenger receptor in cardiac tissue — a GH-independent mechanism through which it exerts direct cardioprotective effects including reduced ischemia-reperfusion injury improved cardiac function after infarction and anti-fibrotic effects. In the pituitary Hexarelin stimulates GH release more potently than GHRP-6 or GHRP-2 on a molar basis. However receptor desensitization occurs more rapidly with Hexarelin than with other GHRPs making continuous daily use ineffective. Pulsatile or cycled administration protocols are required to maintain GH-stimulating efficacy over time.

What is the recommended dosage for Hexarelin?

The typical dose is 100-200 mcg per dose. 2-3 times daily maximum — must be cycled to avoid desensitization. Administration: Subcutaneous injection. Often stacked with CJC-1295 or Sermorelin for synergistic GH release. Due to rapid desensitization use protocols of 4-6 weeks on with 4 weeks off recommended.

What are the side effects of Hexarelin?

Increased hunger (common — ghrelin receptor effect). Facial flushing (common, transient). Fatigue (uncommon). Water retention (uncommon). Elevated cortisol and prolactin at higher doses (uncommon)

What is the Hexarelin cycle protocol?

Hexarelin is typically cycled 4-6 weeks on and 4 weeks off. Required to prevent rapid desensitization

Questions reflect common community inquiries. This is not medical advice.