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Peptide library

Hexarelin

Limited human dataGrowth hormone

The most potent GHRP for GH release, with notable heart effects in studies and fast loss of response with daily use.

Not approved for human use; sold as a research chemical.

Used for

  • Short, strong GH release cycles
  • Studied for heart function

How it works

A ghrelin-receptor agonist that also binds CD36 on heart tissue, which may explain its cardiac effects.

Half-life: about 2 hours after an IV dose (dogs; no human figure found)

What the research shows

  • In people it raised GH strongly, like GHRP-2, along with cortisol and prolactin.
  • Acute human studies found improved heart pumping; rat studies showed protection after heart attack.
  • The response fades within weeks of continuous use, so it is used in short cycles.
Sources
Arvat 1997, Peptides Bisi 1999, J Endocrinol Invest (heart) Roumi 1995, Peptides (PK in dogs)

Dosing

Dosing isn’t listed on the public site. In the app, each published option is shown with its source (a drug label, a clinical guideline, a trial or community reports) and can be turned into a protocol you review.

Work out the units to draw for your vial →

Side effects

  • Higher cortisol and prolactin
  • Water retention

Cautions

  • Raises GH and IGF-1. Avoid with active cancer or a history of it; can raise blood sugar. Check IGF-1 and fasting glucose on bloodwork.
  • Prohibited in tested sports (WADA).
  • Research-chemical vials have no quality control: purity, dose and sterility vary. Third-party testing helps but is no guarantee.

Storage

Unmixed powder: freezer or fridge, away from light.

Once mixed with bacteriostatic water: fridge; the common rule is to use it within 28 days.

There is no label or published stability data for this one, so treat these as habits, not limits.

Stability once mixed

MiddleCommunity reports, not tested

No stability data. A short chain without obvious weak spots; community reports of 4 weeks or more in the fridge, untested.

Heat, shaking, freezing a mixed vial, light and many needle punctures all speed breakdown. Toss it if it turns cloudy, grows specks or changes color.

More in Growth hormone

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Reference only, not medical advice. Written for this app from the cited research. Doses marked community-reported are not from trials.