Head to head
GHRP-6 against Hexarelin
Two hexapeptide secretagogues from the same research lineage. Hexarelin has a distinct cardiac literature that the others do not, and both were studied acutely rather than over the durations people dose them.
Column A
GHRP-6Growth Hormone Releasing Peptide 6
An early GH secretagogue hexapeptide that strongly stimulates growth hormone and appetite.
Column B
HexarelinHexarelin (growth hormone secretagogue)
A potent synthetic GH-releasing hexapeptide studied for growth hormone release and direct cardioprotective effects.
Side by side, on the facts we can check
| Attribute | GHRP-6 | Hexarelin |
|---|---|---|
| Category | Growth Hormone | Growth Hormone |
| FDA status | Not FDA-approved | Not FDA-approved |
| Half-life | ~15-60 minutes | ~55 minutes |
| Molecular weight | 873.0 Da | 887.0 Da |
| Mechanism | Agonizes the ghrelin/GH secretagogue receptor (GHS-R1a) to stimulate GH release and appetite. | Agonizes the ghrelin/GH secretagogue receptor to release growth hormone, and binds cardiac CD36 receptors implicated in its cardioprotective effects. |
| Human studies cited | 0 | 3 |
| Legal status, US | Not approved; research use only | Not approved; research use only |
Frequently asked questions
What is the difference between GHRP-6 and Hexarelin?
GHRP-6: An early GH secretagogue hexapeptide that strongly stimulates growth hormone and appetite. Hexarelin: A potent synthetic GH-releasing hexapeptide studied for growth hormone release and direct cardioprotective effects.
Which has stronger research evidence, GHRP-6 or Hexarelin?
This database does not grade compounds. It counts what was run in people: 0 of the 3 studies cited on the GHRP-6 profile were human work, against 3 of 5 for Hexarelin. Those counts are of our own citation lists and understate any larger literature, and neither is a recommendation.
Are GHRP-6 and Hexarelin FDA-approved?
GHRP-6: Not FDA-approved. Hexarelin: Not FDA-approved.
Reviewed Sep 2026. This page sets two published records side by side. It is educational, it is not medical advice, and it contains no dosing protocols or recommendations for personal use.