In short
A potent GH-releasing peptide. In a 16-week human study its effect faded with continued use and body composition didn't change. Not authorized in Canada.
Also known asGH-releasing peptide
CategoryGrowth hormone
Canada statusNot authorized in Canada
Human evidence Limited: small or low-quality human studies
Sport (WADA)WADA's Prohibited List bans growth hormone releasing factors and secretagogues (S2) at all times.
Last reviewedNovember 10, 2026
How strong is the human evidence?
- Cell & animal
- Small human studies
- Some randomized trials
- Large randomized trials
What is Hexarelin?
Hexarelin is a synthetic GHRP that can cause large GH release after a single dose.
Is Hexarelin legal in Canada?
Not authorized: no product found in the Drug Product Database.
What the research shows
- Rahim et al. (JCEM 1998): 16 weeks of twice-daily hexarelin in adults led to a partial, reversible weakening of the GH response; IGF-1, body fat, lean mass and bone density did not change significantly.
What it doesn't show
- No evidence of muscle or fat-loss benefits; the main long-term study found minimal effect on the GH–IGF-1 axis.
Common questions
Does hexarelin build muscle?
The 16-week human study found no significant change in lean mass or body fat.
Is hexarelin legal in Canada?
It is not authorized by Health Canada.
Sources
- Rahim A et al. Growth hormone status during long-term hexarelin therapy. JCEM 1998
- Health Canada Drug Product Database (searched Nov 10, 2026)
- World Anti-Doping Agency — Prohibited List
Related
GHRP-2 and GHRP-6Synthetic growth hormone-releasing peptides whose study led to the discovery of the natural hormone ghrelin. Not…Not authorized in Canada
IpamorelinA growth hormone-releasing peptide described in 1998 as the first selective GH secretagogue. Never approved; Health…Not authorized in Canada