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Sermorelin & Men’s Health
6 min read
Updated Oct 28, 2026.
Part of the Sommar Peptide Guide.
Ipamorelin status, as of Oct 28, 2026 (recheck on publish day) On FDA's Category 2 list ("may present significant safety risks") under the 503B outsourcing facility policy. Off 503A Category 2 since Sept 2024, and FDA proposed keeping it off the 503A bulks list. Not approved by FDA for any use. Source: FDA Category 2 page, content current as of Apr 22, 2026.⁴ ⁵
Both peptides get sold as ways to raise growth hormone. They act on different receptors, have different human data, and sit on opposite sides of FDA's lists.
Sommar Club prescribes sermorelin. Sommar Club does not prescribe or sell ipamorelin.
The short answer
Sermorelin | Ipamorelin | |
|---|---|---|
What it is | A copy of the first 29 building blocks of GHRH | A 5-unit synthetic peptide |
Receptor | GHRH receptor on the pituitary | Ghrelin receptor (GHS-R1a)⁶ |
US history | A brand version was approved in the US, then discontinued. FDA found it wasn't withdrawn for safety or effectiveness.³ | Never approved by FDA for any use |
503A compounding | Can be compounded under 503A with a prescription | Off 503A Category 2, but FDA proposed excluding it from the 503A list⁵ |
FDA safety list | Not on Category 2 | On Category 2 under the 503B policy⁴ |
Human studies | Small studies in older adults¹ ² | A 114-person trial after bowel surgery missed its main goal⁷ |
How sermorelin works
Your brain makes a messenger called GHRH. It tells the pituitary to release growth hormone in pulses, mostly at night.
Sermorelin copies the first 29 building blocks of GHRH, the part that carries the message. Your pituitary still decides how much to release, and your body's feedback brakes stay on.
How ipamorelin works
Ipamorelin works through a different door, the ghrelin receptor, also called the growth hormone secretagogue receptor. Ghrelin is best known as a hunger hormone, and its receptor on the pituitary can also cue growth hormone release.
In early lab and animal work, ipamorelin was described as the first "selective" growth hormone secretagogue, meaning it raised growth hormone without raising several other pituitary hormones in those tests.⁶ That was animal data, not people.
Where FDA stands on each
Sermorelin is a different peptide with a US approval history, and it can be compounded under 503A. A brand version was approved in the US. Its maker discontinued it in 2008, and FDA later found it was not withdrawn for reasons of safety or effectiveness.³
What's prescribed today is compounded by licensed US pharmacies with a prescription. FDA doesn't review compounded drugs before they're sold. Compounded sermorelin is not FDA-approved.
Ipamorelin has a shorter, rougher record:⁴ ⁵
Sept 2023: added to FDA's Category 2 list, the substances FDA says may present significant safety risks in compounding.
Sept 2024: taken off the 503A Category 2 list after its nomination was withdrawn.
Oct 2024: at its advisory committee meeting, FDA proposed keeping it off the 503A bulks list.
Today: still on Category 2 under the 503B outsourcing facility policy. Not on the 503A list. Not approved by FDA for any use.
Are peptides legal? covers what coming off a list does and doesn't allow.
What the human research shows
Sermorelin. Small studies, mostly in healthy older adults. In one, 10 men around 68 took it for 14 days, and growth hormone and IGF-1 rose into the range of the study's young men.¹ In two 6-month studies, IGF-1 rose about 30% in men and 23% in women not on estrogen.² Small groups, so treat these as early signals.
Ipamorelin. The best-known human trial gave it to 114 people after bowel surgery to see if it sped up the return of normal gut function. It missed its main goal. It was well tolerated.⁷
We found no head-to-head trial of sermorelin vs ipamorelin.
Side effects and FDA's concerns
Sermorelin. Most common: pain, redness or swelling where you inject. Less common: flushing, headache, dizziness, sleepiness, hives. Mild fluid retention showed up in older-adult studies.² Full list: Sermorelin side effects: an honest list.
Ipamorelin. FDA's stated concerns:⁴
Possible immune reactions, tied to aggregation and impurities
Unnatural amino acids in its structure
Published reports of serious adverse events, including a death with IV use
Full breakdown: What is ipamorelin?
Why they get lumped together
Online, ipamorelin is often sold in a "stack" with CJC-1295, a long-acting GHRH analog. A stack doesn't get its own status. Each peptide keeps its own. In Dec 2024, FDA's advisory committee voted against adding CJC-1295 to the 503A list.⁸ More: What is CJC-1295?
Sermorelin and CJC-1295 both act on the GHRH receptor. That shared target doesn't make them the same drug, or give them the same status.
If sermorelin is what you're looking into
This section is about sermorelin only.
2-minute online quiz. A clinician reviews it. Prescribed only if appropriate.
Injections start at $175 a month, or $119 for your first month with code FIRST40. Medication, clinician care, supplies and shipping included. Pay nothing unless approved. FSA and HSA accepted.
More: sermorelin, prescribed online · What is sermorelin? A simple guide · Sermorelin for women 40+
FAQ
Is sermorelin better than ipamorelin? No trial has compared them head to head that we found. They act on different receptors and have very different FDA records.
Is ipamorelin approved by FDA? No. It is not approved by FDA for any use, and it's on FDA's Category 2 list under the 503B policy.⁴
Is ipamorelin legal in 2026? It came off the 503A Category 2 list in 2024, but it is not on the 503A bulks list, and FDA proposed keeping it off.⁵ "Off Category 2" does not mean "allowed." Rules may shift as FDA's 2026 peptide review goes on, so check the date on anything you read.
Can you take sermorelin and ipamorelin together? Online stacks pair GH peptides, but each keeps its own FDA status. Sommar Club does not prescribe or sell ipamorelin. A clinician decides whether sermorelin alone fits your history.
Is sermorelin the same as HGH? No. Sermorelin signals your pituitary to release your own growth hormone. HGH is the hormone itself.
Sources
Corpas E, et al. GHRH-(1-29) twice daily reverses the decreased GH and IGF-I levels in old men. J Clin Endocrinol Metab. 1992;75(2):530-535.
Merriam GR, et al. Growth hormone releasing hormone treatment in normal aging. J Anti-Aging Med. 2001;4(4):331-343.
US Food and Drug Administration. Determination that sermorelin acetate injection products were not withdrawn from sale for reasons of safety or effectiveness. Federal Register, FR Doc. 2013-04827, March 4, 2013.
US Food and Drug Administration. Certain bulk drug substances for use in compounding that may present significant safety risks (Category 2). Content current as of April 22, 2026.
US Food and Drug Administration. Pharmacy Compounding Advisory Committee meeting, October 29, 2024, briefing materials; and Bulk drug substances nominated for use in compounding under section 503A, updated May 14, 2026.
Raun K, et al. Ipamorelin, the first selective growth hormone secretagogue. Eur J Endocrinol. 1998;139(5):552-561.
Beck DE, et al. Ghrelin mimetic ipamorelin for postoperative ileus in bowel resection patients, a randomized controlled trial. Int J Colorectal Dis. 2014. doi:10.1007/s00384-014-2030-8.
US Food and Drug Administration. Pharmacy Compounding Advisory Committee, December 4, 2024, voting results.
Sommar Club does not prescribe or sell ipamorelin. Everything on this page about ipamorelin is for education only.
Prescription required. Compounded sermorelin is not FDA-approved. A licensed clinician decides if treatment is right for you. Individual results vary. Medical services provided by Wasef Health, PC.
