The Development of Growth Hormone Secretagogues: From GHRP Discovery to MK-677 and Beyond

This comprehensive review traces GH secretagogue development from the first GHRP discovery through hexarelin, ipamorelin, MK-677, and ghrelin — covering two decades of peptide-to-drug translation.

Smith, Roy G·Endocrine reviews·2005·Strong EvidenceReview
RPEP-01088ReviewStrong Evidence2005RETHINKTHC RESEARCH DATABASErethinkthc.com/research

Quick Facts

Study Type
Review
Evidence
Strong Evidence
Sample
Not reported

What This Study Found

GH secretagogue development spans from GHRP-6 discovery through systematic optimization (hexarelin, GHRP-2, ipamorelin for selectivity; MK-677 for oral activity) to ghrelin identification as the natural ligand — two decades of reverse pharmacology driving clinical drug development.

Key Numbers

How They Did This

review study on ghrp, mk-677.

Why This Research Matters

Relevant for ghrp, mk-677, hormone-optimization.

The Bigger Picture

Advances peptide/biomarker research.

What This Study Doesn't Tell Us

See abstract.

Questions This Raises

  • ?Further research needed.
  • ?Clinical translation to evaluate.

Trust & Context

Key Stat:
Key finding GH secretagogue development spans from GHRP-6 discovery through systematic optimization (hexarelin, GHRP-2, ipamorelin for selectivity; MK-677 for ora
Evidence Grade:
strong evidence.
Study Age:
Published in 2005.
Original Title:
Development of growth hormone secretagogues.
Published In:
Endocrine reviews, 26(3), 346-60 (2005)
Authors:
Smith, Roy G(7)
Database ID:
RPEP-01088

Evidence Hierarchy

Meta-Analysis / Systematic Review
Randomized Controlled Trial
Cohort / Case-Control
Cross-Sectional / ObservationalSnapshot without intervening
This study
Case Report / Animal Study

Summarizes existing research on a topic.

What do these levels mean? →

Frequently Asked Questions

What was studied?

The Development of Growth Hormone Secretagogues: From GHRP Discovery to MK-677 and Beyond

What was found?

This comprehensive review traces GH secretagogue development from the first GHRP discovery through hexarelin, ipamorelin, MK-677, and ghrelin — covering two decades of peptide-to-drug translation.

Read More on RethinkPeptides

Cite This Study

RPEP-01088·https://rethinkpeptides.com/research/RPEP-01088

APA

Smith, Roy G. (2005). Development of growth hormone secretagogues.. Endocrine reviews, 26(3), 346-60.

MLA

Smith, Roy G. "Development of growth hormone secretagogues.." Endocrine reviews, 2005.

RethinkPeptides

RethinkPeptides Research Database. "Development of growth hormone secretagogues." RPEP-01088. Retrieved from https://rethinkpeptides.com/research/smith-2005-development-of-growth-hormone

Access the Original Study

Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.

This study breakdown was produced by the RethinkPeptides research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.