In plain English
Hexarelin is the strongest of the growth hormone releasing peptides. It produces the largest growth hormone pulses in its class, but the body stops responding to it quickly, so it is used in short cycles. It has also been studied for protecting the heart.
What it's used for
- Short, strong boosts of growth hormone
- Muscle gain and recovery
- Heart and tissue protection (being studied)
Benefits
In human studies, hexarelin produced larger growth hormone pulses than other peptides in its class. In animal and early human studies, it protected heart muscle and improved heart pumping, an effect that appears separate from growth hormone. Users report fast recovery and strength gains during short cycles.
How it works
In simple terms: hexarelin pushes the ghrelin switch hardest of all, and also acts directly on the heart.
It binds the ghrelin receptor (GHS-R1a) for growth hormone release, and a second receptor, CD36, found on heart and blood vessel cells, which is linked to its heart-protective effects. It raises cortisol and prolactin more than gentler peptides, and the growth hormone response fades with daily use.
Development history
- 1990s: Developed in Italy as a more potent, stable growth hormone releasing peptide.
- 2000s: Studies reveal effects on the heart through the CD36 receptor.
- Today: Used in short cycles for strong growth hormone release.
Typical protocols
These ranges are what users commonly report.
| Use | Dose | Frequency | Length |
|---|---|---|---|
| Standard | 100–200 mcg | 1–3 times daily, empty stomach | 4–8 weeks maximum, then a break |
Cycling
Short cycles of 4–8 weeks with equal time off, because the response fades with continued use.
Administration options
Subcutaneous injection.
Reconstitution and dosing calculator
Hexarelin usually comes in 2 mg or 5 mg vials and is mixed with 2 mL of bacteriostatic water.
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Side effects and safety
- Common: flushing, water retention, mild hunger and injection-site redness.
- Higher rises in cortisol and prolactin than other peptides in its class.
- Can affect blood sugar; people with diabetes should be cautious.
- People with active cancer are usually advised to avoid growth hormone-raising peptides.
- Prohibited in competitive sport (WADA).
Common stacks
CJC-1295 (no DAC): the usual pairing.
Storage
Powder: refrigerate. After mixing: refrigerate at 2–8 °C and use within about 4 weeks.
Compare with
- Ipamorelin: much gentler and suitable for long use.
- GHRP-2 and GHRP-6: strong but less potent than hexarelin.
Frequently asked questions
Why only short cycles?
The body becomes less responsive to hexarelin within weeks of daily use, so users cycle it on and off.
Is it good for the heart?
Animal and early human studies suggest heart-protective effects, but this has not been established in large studies.
References
- Ghigo E, et al. Growth hormone-releasing activity of hexarelin, a new synthetic hexapeptide, after intravenous, subcutaneous, intranasal, and oral administration in man. J Clin Endocrinol Metab. 1994;78(3):693-698.
- Mao Y, et al. Hexarelin treatment in male ghrelin knockout mice after myocardial infarction. Endocrinology. 2013;154(10):3847-3854.