Claimed effect · GHRP-2

Does GHRP-2 help with growth hormone release?

A
Grade A — established in humansApproval-grade diagnostic studies · effect size: moderate
Short answerEstablished in humans. Approval-grade diagnostic studies point the same way: a moderate effect. GHRP-2 produces a large, reproducible GH rise that cleanly separates GH-deficient from healthy people — the basis of its Japanese approval as a diagnostic agent.

What the studies show

GHRP-2 produces a large, reproducible GH rise that cleanly separates GH-deficient from healthy people — the basis of its Japanese approval as a diagnostic agent.

“Peak GH concentrations after GHRP-2 were significantly (P<0.001) lower in patients (1.36+/-2.60 microg/l) than the healthy group (84.6+/-60.9 microg/l) with no difference between hypothalamic and pituitary diseases.”

Verbatim, from the abstractChihara K, et al. A simple diagnostic test using GH-releasing peptide-2 in adult GH deficiency. Eur J Endocrinol, 2007;157:19–27

Several well-run randomised trials in people, pointing the same way. You can plan around this. It still says nothing about whether the effect is worth the side effects for you.

  1. 1
    Chihara K, et al. A simple diagnostic test using GH-releasing peptide-2 in adult GH deficiency.Eur J Endocrinol, 2007;157:19–2777 healthy + 58 GH-deficient adults; the diagnostic basis.

In context

GHRP-2, or pralmorelin, is a synthetic six-amino-acid growth-hormone-releasing peptide. It reliably and measurably raises growth hormone, and on that basis is approved in Japan as a diagnostic test for growth-hormone deficiency. Like natural ghrelin it also increases appetite in short human studies. What it does not have is any trial showing it builds muscle, burns fat or improves body composition — the uses it is actually sold for. It is banned in sport.

GHRP-2 is approved (diagnostic, japan). Legal status differs by country — see the regulation section or the jurisdiction pages.

Questions

Is GHRP-2 proven to help with growth hormone release?
Yes, as far as human trials can show it: Approval-grade diagnostic studies. LYO grades this outcome A.
What studies are behind the grade?
GHRP-2 produces a large, reproducible GH rise that cleanly separates GH-deficient from healthy people — the basis of its Japanese approval as a diagnostic agent.
Is GHRP-2 approved for this?
GHRP-2 is an approved medicine (Approved (diagnostic, Japan)); whether this particular outcome is a licensed indication is stated on the compound page's regulation section.

Other outcomes for GHRP-2

Written and maintained by LYO Research — how pages are written and checked. Reviewed 3 September 2026. Grades count human evidence only; see how LYO grades. Not medical advice. Correct this page →