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Overview
What is Hexarelin (Examorelin)?
Hexarelin (also known as Examorelin) is a synthetic hexapeptide growth hormone releasing peptide (GHRP) and one of the most potent GH secretagogues studied. Derived from GHRP-6 by Mediolanum Farmaceutici, it stimulates growth hormone release through the ghrelin receptor (GHS-R1a) and uniquely binds to cardiac CD36 receptors, providing cardioprotective effects independent of GH release. Hexarelin reached Phase II clinical trials for growth hormone deficiency and congestive heart failure but was discontinued in 2005 for strategic reasons. Research demonstrates its potential in cardioprotection, neuroprotection, and metabolic regulation.
Key Benefits
Most potent GHRP for GH release, unique cardioprotective effects via CD36 receptor, supports tissue repair and recovery, neuroprotective properties
Mechanism of Action
Binds to ghrelin receptor (GHS-R1a) on pituitary somatotrophs to stimulate pulsatile GH release. Also activates cardiac CD36 receptors providing GH-independent cardioprotection through anti-apoptotic and anti-fibrotic mechanisms.
Molecular Information
Weight
887.04 Da
Length
6 amino acids
Type
Synthetic hexapeptide (GHRP)
Amino Acid Sequence:
His-D-2-methyl-Trp-Ala-Trp-D-Phe-Lys-NH2
* Derived from GHRP-6 with 2-methyl-Trp substitution for enhanced stability and potency
Pharmacokinetics
Research Indications
Growth Hormone Release
Most potent GHRP studied, stimulating dose-dependent GH release with peak levels at 30 minutes post-injection
IGF-1 Elevation
Increases insulin-like growth factor 1 through enhanced pituitary GH secretion
Pulsatile GH Pattern
Preserves natural GH secretion rhythm when dosed appropriately throughout the day
Research Protocols
Disclaimer
Hexarelin is the most potent GHRP but causes faster desensitization than Ipamorelin. Strict cycling (8-16 weeks on, 4-6 weeks off) is essential to maintain effectiveness. Consider starting with Ipamorelin if new to GHRPs. This is not medical advice. Consult a healthcare provider before use.
Timing
Administer on empty stomach (2+ hours after eating, 30+ minutes before eating) for optimal GH release. Evening dose 30 minutes before bed maximizes nocturnal GH pulse.
Peptide Interactions
How to Reconstitute
Important
Always use bacteriostatic water (BAC). Sterile technique is essential.
Clean both vial tops with alcohol and let dry completely
For 2mg vial: Add 2mL bacteriostatic water (creates 100mcg per 10 units)
For 5mg vial: Add 2.5mL bacteriostatic water (creates 200mcg per 10 units)
Inject water slowly down the side of the vial to prevent foaming
Gently swirl or roll vial - do not shake vigorously
Solution should be clear and colorless
Label with reconstitution date and concentration
Store immediately in refrigerator at 2-8°C
Quality Indicators
Third-party COA verification
Purchase from vendors providing certificates of analysis showing >98% purity and correct molecular weight (887 Da)
Proper cold chain shipping
Peptide should arrive with ice packs in insulated packaging, especially in warm weather
Vacuum-sealed vials
Legitimate products create vacuum when reconstituted - water should be drawn into vial
Monitor for desensitization
GH response decreases over time - follow cycling protocols strictly
Cortisol and prolactin effects
Unlike Ipamorelin, hexarelin can elevate cortisol and prolactin - monitor if using long-term
Pre-mixed solutions
Avoid pre-reconstituted products - hexarelin degrades rapidly in solution
Discolored or cloudy solution
Solution must be clear - any discoloration indicates degradation
What to Expect
- Day 1-7: Improved sleep quality, potential facial flushing post-injection, increased appetite possible
- Week 2-4: Enhanced recovery from exercise, improved skin quality, beginning of body composition changes
- Week 4-8: Noticeable improvements in lean mass and fat loss, some desensitization may begin
- Week 8-12: Continued benefits but GH response reduced 40-50% from baseline
- Week 12-16: Maximum cycle length - take mandatory 4-6 week break to restore sensitivity
- Post-cycle: GH response recovers to near-baseline within 4 weeks off
Side Effects & Safety
- Most potent GHRP but also highest side effect profile among GHRPs
- Elevates cortisol and prolactin at standard doses - unlike Ipamorelin
- May cause water retention, particularly in first 1-2 weeks
- Can affect glucose metabolism - monitor if diabetic or pre-diabetic
- Not recommended for those with active cancer due to growth-promoting effects
- WADA prohibited substance - banned in competitive sports
- Secondary hypogonadism possible with prolonged use due to prolactin elevation
- Partial desensitization is normal and reversible with cycling
References
Growth Hormone-Releasing Activity of Hexarelin in Humans (1994)
Double-blind, placebo-controlled dose-response study demonstrating dose-dependent GH release. Peak plasma GH at 30 minutes, returning to baseline within 240 minutes. Cmax values: 26.9 ng/ml (0.5 μg/kg), 52.3 ng/ml (1 μg/kg), 55.0 ng/ml (2 μg/kg) vs 3.9 ng/ml placebo.
View Study (opens in new tab) →Hexarelin Treatment Preserves Myocardial Function After MI (2018)
Demonstrated significant improvement in LV function after 14 days. Hexarelin treatment reduced LV collagen concentration by ~53%, decreased inflammatory cytokines (TNF-α, IL-1β), and shifted autonomic balance toward parasympathetic predominance.
View Study (opens in new tab) →Protective Effects of Hexarelin in ALS Neuroblastoma Model (2023)
Hexarelin protected cells from H2O2-induced cytotoxicity by increasing Bcl-2 expression, reducing caspase-3 activation, and modulating MAPK/Akt pathways. Significantly decreased γH2AX positive cells indicating DNA damage protection.
View Study (opens in new tab) →Quick Start Guide
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Community Insights
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