Hexarelin

Cited range Desensitization discussed

ClassGHRP

Relative potencyHigh GH pulse in experimental work

Half-lifeShort

CaveatReceptor desensitization with frequent use is a recurring theme

What it is

Hexarelin (examorelin) is a potent GHRP used in cardiovascular and GH-secretagogue research. It is not an approved GH drug.

Benefits in plain language

What researchers and reference users usually mean when they talk about this compound. These are study themes and common claims — not a promise that it will do this in you.

One of the stronger GHRPs. Big GH pulse, more cardiac-receptor and desensitization talk than ipamorelin.
People chased it for GH output. Many moved away because it can wear out the response faster.
Not first-line in modern secretagogue write-ups.

If a branded, FDA-approved product exists, that label is the only dose that is actually authorized. Research-chemical vials are a different object.

Mechanism of action

Strong GHSR agonism. Some literature also explored cardiac GHSR effects independent of the GH pulse.

Possible side effects / caveats

Same secretagogue cluster plus more discussion of tachyphylaxis if pulsed many times daily for long stretches. Cortisol/prolactin spillover is often listed as higher than ipamorelin.

Protocol ranges

Source tier	Amount	Frequency / duration	Notes
Cited range	100–200 mcg per pulse	1–2× daily in many secondary sources	Lower frequency sometimes chosen because of potency