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Ipamorelin: Evidence, Legal Status, and Safety

Ipamorelin is a growth-hormone secretagogue that works through the ghrelin receptor, often stacked with CJC-1295. No completed human RCTs support its popular recovery, fat-loss, or anti-aging uses. It is not FDA-approved, reportedly on the FDA's restricted-compounding list pending review, and banned at all times under WADA's anti-doping code.

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YourProtocol Research
In-house · Synthesized from the cited primary sources
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5 min
Difficulty
Beginner
Sources
1
What the evidence says
What it is

Understand the mechanism

A growth-hormone secretagogue that works through the ghrelin receptor (a “GH-releasing peptide”), a different pathway from GHRH analogs like CJC-1295 or tesamorelin, and often stacked with CJC-1295 to combine two GH-release pathways.

Combining two different receptor pathways is the marketing logic behind the “CJC-1295 plus ipamorelin” stack.

Research synthesis of GH-secretagogue peptides, 2026
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Evidence tier: C

See what the human evidence actually is

No completed human RCTs for ipamorelin's popular uses, recovery, fat loss, anti-aging, were found. It is not an FDA-reviewed drug.

Popularity as a “stack” ingredient does not substitute for trial evidence.

Research synthesis, 2026
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Legal status

Know where it actually stands

Not FDA-approved for any use. Reported on the FDA's 503A Category 2 restricted-compounding list as of April 2026, and reported as one of five peptides in the FDA's formal review process. Banned at all times under WADA's S2 category.

Same reported status class as CJC-1295: under formal review, not approved.

FDA 503A Category 2 reporting; WADA S2 list
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Safety

Know the real risk

Same GH-secretagogue class-effect caveats as CJC-1295: hunger and ghrelin increase, prolactin elevation, and REM-sleep disruption are flagged for this compound class. Unregulated-sourcing purity risk applies as with the rest of the gray market.

These are class-wide, expert-flagged effects, not isolated anecdotes.

Huberman Lab peptide-therapeutics episode
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What it is

Ipamorelin is a growth-hormone-releasing peptide (GHRP) that works through the ghrelin receptor, a different mechanism from GHRH analogs like CJC-1295 or tesamorelin, and is often stacked with CJC-1295 to combine two GH-release pathways. This page reports the honest evidence tier, legal status, and safety picture; it does not describe how to use it.

Why it works▼
No completed human RCTs for ipamorelin's popular use case, recovery, fat loss, or anti-aging, were found; it is not an FDA-reviewed drug. It is reported on the FDA's 503A Category 2 bulk-substances list as of April 2026, the same status class as CJC-1295, and is reported as one of five peptides moving through the FDA's formal review process. On WADA's list it falls under the S2 category (growth-hormone secretagogues), banned at all times in Olympic and WADA-code sport. Andrew Huberman's Huberman Lab episode on peptide therapeutics groups ipamorelin with hexarelin and MK-677 as growth-hormone secretagogues, flagging hunger and ghrelin increase, prolactin elevation, and REM-sleep disruption as class-wide effects; on the related compound hexarelin specifically he has said, “I can't see why anyone would use high doses.”
The evidence
Sources 1
Primary sources behind this page, cited straight to the source: peer-reviewed papers and reporting. Select any to view it here.
1
Huberman Lab: Benefits & Risks of Peptide Therapeutics for Physical & Mental Health (GH-secretagogue class segment)
Article · hubermanlab.com
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Is this for you?
Good fit if
  • Anyone considering ipamorelin who wants the honest evidence before discussing it with a clinician
  • Athletes checking WADA and anti-doping status
  • Readers who have seen the “CJC-1295 plus ipamorelin” stack marketed and want the actual evidence
  • Readers comparing GH secretagogues to FDA-approved GH-axis drugs like tesamorelin
Cautions
  • Not FDA-approved for any use; reported on the FDA's restricted-compounding list pending formal review.
  • Banned at all times under WADA's anti-doping code (S2); can result in a competition ban if detected.
  • No completed human RCT establishes its safety or efficacy for the popular use case.
  • Educational only, not medical advice.
Common questions
Is ipamorelin legal?▾
It is not FDA-approved for any use and is reported on the FDA's 503A Category 2 restricted-compounding list as of April 2026, pending formal review. It is also banned at all times for competitive athletes under WADA's code.
Why is ipamorelin often stacked with CJC-1295?▾
The two work through different mechanisms, CJC-1295 through the GHRH receptor and ipamorelin through the ghrelin receptor, and are marketed together to combine two GH-release pathways. No completed human RCT has evaluated that combination's safety or efficacy.
What are the known risks of GH-secretagogue peptides like ipamorelin?▾
Andrew Huberman flags hunger and ghrelin increase, prolactin elevation, and REM-sleep disruption as class-wide effects for GH secretagogues including ipamorelin.
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Not medical advice. This page is for education only and is not a substitute for professional medical care. Consult a qualified clinician before changing your health routine.
Editorial disclosure. This protocol is written and fact-checked by the YourProtocol editorial team directly from the primary sources cited below; it is not written or reviewed by any outside expert.

Ipamorelin: Evidence, Legal Status, and Safety
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