Hexarelin
His-D-2-methyl-Trp-Ala-Trp-D-Phe-Lys-NH2
The most potent synthetic GH secretagogue with unique cardioprotective benefits.
Hexarelin is a synthetic hexapeptide and one of the most potent Growth Hormone Releasing Peptides (GHRPs) available. It stimulates a strong, dose-dependent release of growth hormone from the pituitary gland by acting on specific receptors. Beyond its powerful effects on GH levels, Hexarelin is also uniquely researched for its direct cardioprotective properties, independent of its hormonal actions.
Key Benefits
Mechanism of Action
Hexarelin functions as a potent agonist for both the ghrelin receptor (GHSR-1a) and the CD36 receptor. Its binding to the GHSR-1a in the hypothalamus and pituitary gland mimics the action of ghrelin, triggering a significant pulse of Growth Hormone (GH). This potent action, however, leads to rapid desensitization of the receptor, necessitating cyclical use.
Dosing Guidelines
Typical Dose
100-200 mcg
Frequency
1-3x daily
Duration
4-8 weeks
Note: Administer subcutaneously on an empty stomach, at least 1-2 hours after the last meal and 30 minutes before the next. Due to strong receptor desensitization, strict cycling (e.g., 4-8 weeks on, 4+ weeks off) is required for continued efficacy.
Research & Studies
A complete guide to the mechanisms, research, and community protocols for Hexarelin.
Read Full ResearchReview of studies demonstrating Hexarelin's unique ability to protect and repair cardiac tissue independent of GH release.
Read Full ResearchComparing two popular GH secretagogues on their GH release strength, prolactin/cortisol impact, and desensitization.
Read Full ResearchPotential Side Effects
Reported side effects may include:
- • Significant increase in cortisol and prolactin levels
- • Rapid desensitization of the ghrelin receptor, reducing effectiveness over time
- • Water retention or bloating, especially at higher doses
- • Numbness or tingling in hands and feet (carpal tunnel-like symptoms)
- • Increased appetite due to ghrelin mimetic action
- • Redness, itching, or soreness at the injection site
This information is for research purposes only. Always consult with a healthcare professional.
Popular Stacking Options
Hexarelin + CJC-1295 (No DAC)
CJC-1295 (a GHRH) amplifies the GH pulse created by Hexarelin (a GHRP), creating a powerful synergistic effect on total GH release.
Shop this stackHexarelin + Tesamorelin
As a GHRH analog, Tesamorelin works on a different receptor to amplify Hexarelin's GH pulse, creating a strong synergistic effect for muscle growth and fat loss.
Shop this stackHexarelin + BPC-157
Combines Hexarelin's systemic growth signals (via GH/IGF-1) with BPC-157's localized healing for accelerated injury recovery.
Shop this stackFrequently Asked Questions
Why is Hexarelin so potent compared to other GHRPs?
It has an extremely high binding affinity for the ghrelin receptor, creating a much stronger signal for GH release than peptides like GHRP-2 or Ipamorelin. This potency is powerful but is also the direct cause of its rapid desensitization, meaning it stops working effectively if used for too long without a break.
What does 'desensitization' mean with Hexarelin?
It means your body's receptors become less responsive to the peptide over time. After a few weeks of continuous use, the same dose of Hexarelin will produce a much smaller GH pulse. This is why strict cycling protocols, like 4 weeks on and 4 weeks off, are essential for it to remain effective.
Does Hexarelin raise cortisol and prolactin?
Yes, and this is its main drawback compared to more selective peptides like Ipamorelin. At typical research doses, Hexarelin causes a significant spike in both cortisol (the stress hormone) and prolactin. This can lead to unwanted side effects like water retention, lethargy, or mood changes.
Are the cardioprotective effects of Hexarelin real?
Yes, this is one of the most interesting aspects of Hexarelin. Research in animal models has shown it can have protective and even healing effects on heart tissue, particularly after ischemic events. This effect appears to be independent of its GH-releasing action, as it works through a different receptor (CD36) in the heart.
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