Sermorelin Peptide: What It Is, How It Works, and What Is Actually Known

October 2, 2026
Liv Health editorial team
4 min read

Key Takeaways

Sermorelin is a synthetic analog of growth hormone-releasing hormone, the signal that tells your pituitary gland to release your own growth hormone.
In a small study, older men's growth hormone and IGF-1 levels rose after 14 days of GHRH injections at the higher dose tested.
A licensed provider reviews your history, sets your dose and schedule, and refines them over time.
A licensed pharmacy prepares your sermorelin for you, to the prescription your provider writes.

Sermorelin is a prescription peptide, and a licensed provider decides whether it's right for you. It works one step upstream of growth hormone, at the gland that releases it.

How Does Sermorelin Work With Your Body?

It sends your pituitary the same signal your body uses to call for growth hormone. Sermorelin is a shorter version of that signal, growth hormone-releasing hormone. Its full name is growth hormone releasing factor 1-29 NH2-acetate, and it binds the same receptors.

That signal travels from your hypothalamus to your pituitary gland, where it prompts cells to make growth hormone and release it in pulses. That's how the approved labeling of tesamorelin, another analog of this signal, describes the system sermorelin works on.

Your body stays in charge of the release. Somatostatin, the body's own brake, keeps regulating it. Release from the pituitary still comes in pulses, not constantly (Walker, Clinical Interventions in Aging, 2006).

Layout: a single left-to-right signaling path on one horizontal axis, three labeled stages, with a return arrow beneath
Stage 1, "Hypothalamus": label "releases GHRH, the signal". Beneath it, a small tag reading "sermorelin acts HERE" with a rule pointing to this stage and no other
Stage 2, "Pituitary somatotrophs": label "synthesize and release growth hormone, in pulses"
Stage 3, "Growth hormone in circulation": label "your own, released by your own gland"
The return arrow, drawn beneath stages 3 back to 1, labeled "somatostatin, the body's own brake, stays in the circuit"
A second, visually SUBORDINATE element: a short dashed arrow entering at stage 3 only, labeled "injected growth hormone would enter here instead". It must be drawn dashed and in the neutral gray, never at the weight of the main path, because it is the contrast rather than the subject
Caption underneath: "A signal, not a supply. The gland still has to answer it."
Critical: nothing in this diagram may indicate an amount, a duration, a rate or an outcome. There are no figures anywhere in it, and no depiction of a body part, tissue or organ beyond the two labeled boxes
Do not include: packaging, branding, molecular structures, anatomy illustration, or any before-and-after device

Start with an evaluation

Is Sermorelin the Same as Growth Hormone?

No. They work at different points in the same system.

Growth hormone: the hormone itself, supplied from outside the body. It raises levels directly, because you're adding the hormone.

Sermorelin: the upstream signal. It acts on the pituitary, the gland that releases your own growth hormone, and leaves your body's natural feedback in place.

Growth hormone adds the hormone directly, while sermorelin asks your body to release its own. It's the difference between pouring water into a tank and asking the pump to run. If you're weighing similar peptides, our comparison with tesamorelin and ipamorelin walks through how the three differ.

What Studies of Sermorelin Have Found

Sermorelin raised hormone levels in older men, and older adults taking it did better on thinking tests, in two small studies. Older men's growth hormone and IGF-1 levels rose after 14 days of GHRH injections at the higher dose tested, in a small study. IGF-1 is also the blood marker your provider checks as your plan goes on.

Older adults did better on tests of thinking and attention after six months of sermorelin injections, in a separate study. Those were group results, so your provider will talk with you about your own goals and how you'll review your progress together.

What Does Compounded Mean for Your Prescription?

It means your sermorelin is prepared for you. Once a clinician has evaluated whether it's right for you, a licensed pharmacy makes it from the prescription your provider writes. Liv doesn't compound it. Licensed pharmacy partners do.

How Your Provider Sets Your Dose

Your provider chooses your dose within a starting dose and a maximum set by Liv's prescribing protocol. If you tolerate the starting dose, your provider may increase it, staying within that limit. Past the maximum, more does nothing, because your body can't use it.

Check with your provider before changing your dose.

Once you've been prescribed a dose, our schedule and supply calculator can help you turn it into units on a syringe.

How You and Your Provider Track Your Progress

Under Liv's protocol, you'll have your first IGF-1 blood test at 2 to 6 weeks, and your provider looks at the result alongside your sleep data and how you feel.

Before each refill, you tell us how you're doing, and your provider reviews your progress and adjusts your plan as needed. You'll also have a check-in every three months.

Side Effects and What to Tell Your Provider

Your provider reviews your health history and the medicines you take before prescribing. As with any injection, you may notice a reaction where you inject.

Follow the instructions that come with your shipment, since they cover the preparation you receive. Tell your provider about anything new or anything that bothers you, and ask before changing your dose or schedule.

Who Decides Whether Sermorelin Is Right for You?

A licensed provider. Sermorelin is prescription-only, so your provider makes that call at your clinician evaluation. Our results-timeline guide covers what a before-and-after can and can't tell you.

When you're ready, start with an evaluation, and a licensed provider will go over your history and goals with you.

Frequently Asked Questions

Is sermorelin a form of growth hormone?

No. Growth hormone is the hormone itself, supplied from outside the body. Sermorelin is an analog of the signal that asks your pituitary to release its own. It relies on your own pituitary to release the hormone.

What are the benefits of sermorelin?

Sermorelin acts on your pituitary gland to support your body's own growth hormone release. In research, older men's growth hormone and IGF-1 levels rose after 14 days of GHRH injections, and older adults did better on tests of thinking and attention after six months of sermorelin injections.

In the first study, Corpas et al., 1992, ten healthy older men (average age 68) had GHRH-(1-29) injections twice daily for 14 days at each of two doses.

The higher dose was 1 mg twice daily, and growth hormone and IGF-1 rose significantly only at that dose. These are hormone measurements, not a promise that symptoms improve in two weeks, and the study regimen isn't dosing advice.

That study included men only, and it didn't use Liv's compounded preparation. It measured hormone levels, not sleep, energy, muscle or weight.

In the second study, Vitiello et al., 2006, older adults did better on several cognitive tests. The results didn't depend on gender or estrogen status. The randomized, placebo-controlled trial enrolled 100 adults ages 60 to 85, and 89 completed it.

They received six months of injected sermorelin acetate (GEREF), starting at 1 mg nightly, and some had their dose adjusted. The trial looked at cognitive tests, not dementia prevention, longer life or a percentage improvement in everyday memory. It didn't include adults ages 35 to 55.

Is sermorelin FDA-approved?

No sermorelin product is FDA-approved and on the market today. Sermorelin was the active ingredient in GEREF, an injection the FDA approved to treat children with short stature linked to low growth hormone. Its sponsor discontinued it in December 2008.

FDA later determined that GEREF wasn't withdrawn from sale for reasons of safety or effectiveness (Federal Register, 78 FR 14104, March 4, 2013).

What does compounded mean for my sermorelin?

Compounded means a licensed pharmacy mixes the medicine for one person, to their prescription. It isn't made in large batches. The FDA doesn't approve compounded medicines for safety, quality or how they're made.

There's no approved label for compounded sermorelin, so there's no approved dose to copy. Follow your prescription and the instructions that come with your shipment.

How is my sermorelin dose set?

Your provider sets it. Liv's prescribing protocol sets a moderate starting dose and a maximum.

Your provider may increase the dose if you tolerate it, while staying within Liv's maximum, because past the maximum the body can't use the extra. Don't increase your dose on your own.

How would I know whether it is working?

Your provider checks. Liv's protocol calls for an IGF-1 blood test at 2 to 6 weeks, and your provider reviews it with your sleep data and how you feel. Along with your lab results, tell your provider how you feel.

How much your level can rise depends on your pituitary. A change in IGF-1 doesn't necessarily mean you'll notice a benefit, particularly if your level was already adequate. Your provider considers both your results and your experience when discussing whether to continue.

Our before-and-after guide sets out the schedule and what each check point is for.

Does Liv build a planned break into sermorelin?

Yes. Liv's protocol includes a planned pause, also called a washout, intended to limit tolerance. Your provider explains when to pause and what to do during the break.

References

Corpas, E., Harman, S. M., Piñeyro, M. A., Roberson, R., & Blackman, M. R. (1992). Growth hormone (GH)-releasing hormone-(1-29) twice daily reverses the decreased GH and insulin-like growth factor-I levels in old men. Journal of Clinical Endocrinology and Metabolism, 75(2), 530-535. https://pubmed.ncbi.nlm.nih.gov/1379256/

Federal Register. (2013). Determination that GEREF (sermorelin acetate) injection and GEREF Diagnostic were not withdrawn from sale for reasons of safety or effectiveness. 78 FR 14104, March 4, 2013.

Theratechnologies Inc. (2025). EGRIFTA WR (tesamorelin) for injection, for subcutaneous use: Prescribing information. DailyMed, U.S. National Library of Medicine. SPL version 2, revised March 2025. Section 12.1, cited for the description of the GHRH system. https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=839334d3-8c1d-4c26-9036-2ab524a6ea75

U.S. Food and Drug Administration. (2024). FDA briefing document, Pharmacy Compounding Advisory Committee meeting, October 29, 2024: ipamorelin-related bulk drug substances. Cited for the GEREF approval record. https://www.fda.gov/media/182088/download

Vitiello, M. V., Moe, K. E., Merriam, G. R., Mazzoni, G., Buchner, D. H., & Schwartz, R. S. (2006). Growth hormone releasing hormone improves the cognition of healthy older adults. Neurobiology of Aging, 27(2), 318-323. https://faculty.washington.edu/vitiello/Recent%20Publications/GHRH%20and%20Cognition%20in%20Aging.pdf

Walker, R. F. (2006). Sermorelin: A better approach to management of adult-onset growth hormone insufficiency? Clinical Interventions in Aging, 1(4), 307-308. https://pmc.ncbi.nlm.nih.gov/articles/PMC2699646/

Important Information

The FDA does not approve compounded medications for safety, quality, or manufacturing. Some medications dispensed through Liv are compounded; where a product is FDA-approved, its approved labeling governs its use. Prescriptions and a medical evaluation are required for certain products. The information provided on this blog is for general informational purposes only. It is not intended as a substitute for professional advice from a qualified healthcare professional and should not be relied upon as personal health advice. The information contained in this blog is not meant to diagnose, treat, cure, or prevent any disease. Readers are advised to consult with a qualified healthcare professional for any medical concerns, including side effects. Use of this blog's information is at your own risk.

Liv Health is not a medical provider. Liv connects individuals with independent licensed healthcare providers who independently evaluate each patient to determine whether a prescription treatment program is appropriate. All prescriptions are written at the sole discretion of the licensed provider. Medications are filled by state-licensed pharmacies. Please consult a licensed healthcare provider before making any medical decisions.