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Hexarelin

Hexarelin (Examorelin)

Early-Stage ClinicalNot FDA EvaluatedPrimary Endpoint Met

Early-stage clinical evidence exists but is limited. Larger, well-controlled trials are needed.

A synthetic peptide that produces the strongest single-dose growth hormone release of any peptide in its class, though it also raises stress hormones (cortisol) and prolactin. It has also shown heart-protective effects in animal studies through a separate mechanism unrelated to growth hormone. This peptide is not FDA-approved.

19 studiesUpdated 2026-03-10Intravenous · Subcutaneous · Intranasal · Oral

This entry is a cited research summary, not an established treatment reference. Dosing language is included as source context, not as medical instruction.

Clinical bottom lineMixed evidence

Hexarelin has moderate clinical evidence but is not FDA-approved.

Early-stage clinical evidence exists but is limited. Larger, well-controlled trials are needed.

Safety Summary

Across small human studies, hexarelin repeatedly raised ACTH, cortisol, and prolactin alongside GH stimulation (PMID 9430449, PMID 11238504, DOI 10.1007/BF03350297). In the 16-week chronic study, repeated dosing caused partial but reversible reduction in GH responsiveness without significant changes in IGF-1, lean mass, fat mass, or bone mineral density PMID 9589671. Review material notes shorter stage 4 sleep after hexarelin (PMC5632578 via). Some users report flushing and water retention but these are not systematically documented in clinical studies.

Clinical check-in

If real-world use or exposure is being considered, review potential interactions, contraindications, and monitoring needs with a licensed clinician rather than relying on summary copy alone.

See cited studies on this page (19)

Cited sources

Every claim on this page links to one of the 19 sources below. Identifiers are PubMed (PMID), ClinicalTrials.gov (NCT), or DOI; click through to the source of record before acting on a claim.

  1. 1PMID 7957536PubMed
  2. 2PMID 9430449PubMed
  3. 3PMID 11238504PubMed
  4. 4PMID 9589671PubMed
  5. 5doi:10.1007/BF03350297DOI
  6. 6PMID 8921832PubMed
  7. 7PMID 11061542PubMed
  8. 8PMID 12486113PubMed
  9. 9PMID 11600590PubMed
  10. 10PMID 11297611PubMed
  11. 11PMID 10193871PubMed
  12. 12PMID 41766237PubMed
  13. 13doi:10.1016/j.biopha.2020.110165DOI
  14. 14doi:10.33393/dti.2021.2347DOI
  15. 15doi:10.1186/s40001-023-01318-wDOI
  16. 16doi:10.3390/ijms24020993DOI
  17. 17doi:10.1139/cjpp-2020-0218DOI
  18. 18PMID 40465419PubMed
  19. 19PMID 29627764PubMed