# Does sermorelin work? What it does, and who it may suit
Updated November 3, 2026. Canonical: https://try-astra.com/sermorelin/guides/does-it-work/

**Sermorelin at Astra:** $91/mo on the 6-month plan ($546 every 6 months) or $120/mo on the monthly plan. Includes medication, provider visit, supplies and shipping. Full refund if a provider does not prescribe. Pay by card or Apple Pay, or over time with Klarna, Afterpay or Affirm at checkout. Prescription required. Compounded medications are not FDA-approved. [Start a visit](https://start.try-astra.com/start-online-visit/sermorelin).

## The short answer

**Yes, at what it is designed to do. Sermorelin signals your pituitary to release more of your own growth hormone (GH), and small human studies have measured that response.** Results for wider goals such as muscle, energy and skin are early: promising in places, but not proven in large trials. That is why it belongs with a licensed provider who can review your health and track your response.

## Why people choose sermorelin

- **It works with your own body.** Instead of supplying growth hormone directly, it prompts your pituitary to release its own, in pulses and under the body's normal feedback ([Walker, 2006](https://pubmed.ncbi.nlm.nih.gov/18046908/)).
- **The response can be measured.** In older men, GH and IGF-1 rose to levels similar to young men at the higher dose studied ([Corpas, 1992](https://pubmed.ncbi.nlm.nih.gov/1379256/)). Your provider can track IGF-1 with a blood test.
- **It has a long history.** A brand version, Geref, was once FDA-approved, and FDA found it was [not withdrawn for safety or effectiveness](https://www.govinfo.gov/content/pkg/FR-2013-03-04/html/2013-04827.htm). Today's compounded sermorelin is not FDA-approved.

**Considering sermorelin?** A licensed provider reviews your answers and decides whether it is appropriate. See how it compares on price in the [sermorelin price index](/sermorelin-price-index/), or read about the [sermorelin program](/sermorelin/). [Start your sermorelin visit](https://start.try-astra.com/start-online-visit/sermorelin).
$120 charged monthly, or $546 every 6 months ($91/mo). Renews automatically; cancel any time. Full refund if a provider does not prescribe. [Subscription terms](/subscription-terms/).

## What the studies measured

| Study | Who | What improved | What did not change |
|---|---|---|---|
| [Corpas, 1992](https://pubmed.ncbi.nlm.nih.gov/1379256/) | 10 older men; 14 days | GH and IGF-1 rose at the higher dose | Too short to test body changes |
| [Vittone, in this review](https://pmc.ncbi.nlm.nih.gov/articles/PMC7108996/) | 11 men aged 64 to 76; 6 weeks | 12-hour GH output almost doubled | IGF-1, weight, muscle and body fat |
| [Khorram, 1997](https://pubmed.ncbi.nlm.nih.gov/9141536/) | 10 women and 9 men aged 55 to 71; 16 weeks of a closely related analog | GH and IGF-1 in both sexes; skin thickness in both; muscle, insulin sensitivity, well-being and libido in men | Weight and sleep quality; IGF-1 drifted back toward baseline by week 16 |
| [Thorner, 1996](https://pubmed.ncbi.nlm.nih.gov/8772599/) | 110 children with GH deficiency; up to 1 year | Growth rate rose from 4.1 to 7.2 cm a year at 12 months | Open-label, with no placebo group |

These studies are small, and the adult ones are mostly decades old, so they can show what is possible but cannot predict your result.

## The goals people ask about

| Goal | What the research shows so far |
|---|---|
| Muscle | Lean mass rose in men, not women, in [one 16-week trial](https://pubmed.ncbi.nlm.nih.gov/9141536/). It did not change in [a 6-week study](https://pmc.ncbi.nlm.nih.gov/articles/PMC7108996/) |
| Energy and well-being | General well-being improved in men, not women, in [the same trial](https://pubmed.ncbi.nlm.nih.gov/9141536/). Energy has not been a main outcome in a sermorelin trial we found |
| Skin | Skin thickness rose in men and women in [the same trial](https://pubmed.ncbi.nlm.nih.gov/9141536/), though cosmetic benefit was not shown |
| Recovery | A common reason people ask about sermorelin, but we found no controlled trial measuring it |
| Fat loss | Weight did not change in these studies. If this is your main goal, see [sermorelin and weight loss](/sermorelin/guides/weight-loss/) |
| Sleep | Sleep quality did not change in [one trial](https://pubmed.ncbi.nlm.nih.gov/9141536/). See [sermorelin and sleep](/sermorelin/guides/sleep/) |

> Three months on Sermorelin and the difference is remarkable. My energy levels are consistent throughout the day, I'm sleeping better than I have in years, and I've noticed real improvements in my workout recovery.
> Michael R., 42, Denver, CO. Astra patient, 3 months on sermorelin. One patient's experience, not a typical or guaranteed result. Individual results vary.

## Who it may suit

**May suit you if:**
- You want to support growth hormone through your own pituitary rather than take HGH
- You are comfortable with injections at home
- You want a clinician to review your health and track your response
- You want to try it with realistic expectations

**Better to skip if:**
- You are pregnant or breastfeeding, have active cancer or have certain pituitary conditions ([safety details](/sermorelin/guides/is-it-safe/))
- Your main goal is weight loss, where [GLP-1 medications](/weight-loss-overview/) are the treatments studied
- You compete in tested sports, where it is [prohibited](https://www.wada-ama.org/sites/default/files/2024-09/2025list_en_final_clean_12_september_2024.pdf)
- You want a guaranteed result

## Where you get it matters

Sermorelin is a prescription medication, so how you get it matters as much as whether you take it. Read [why a licensed US provider beats a research-peptide seller](/sermorelin/guides/online-prescription/).

## Common questions

### Is it worth taking sermorelin?
That depends on your goal and health, which a licensed provider can help you weigh. It is well supported for raising GH signalling, while wider benefits are less certain. Also consider [its safety record](/sermorelin/guides/is-it-safe/) and [its cost](/sermorelin-price-index/).

### How long does sermorelin take to work?
GH rises within minutes of an injection, and IGF-1 rose within 2 weeks in one trial. How soon people notice a difference is not well studied. See the [results timeline](/sermorelin/guides/results-timeline/).

### Will sermorelin grow hair?
We found no published research supporting this. A PubMed search for sermorelin or GHRH(1-29) with hair or alopecia on November 3, 2026 returned no results.

### What should I not mix with sermorelin?
Tell your provider everything you take. Drugs.com lists [a moderate interaction with tirzepatide](https://www.drugs.com/drug-interactions/sermorelin-with-tirzepatide-2055-0-4363-0.html) over blood sugar control. See [sermorelin with GLP-1 medications](/sermorelin/guides/with-tirzepatide-or-semaglutide/).

## Safety at a glance

Reported side effects include flushing, injection site pain or irritation and mild headache. Sermorelin is not recommended in pregnancy or breastfeeding, active cancer or certain pituitary conditions, and long-term safety in adults has not been established. It is [prohibited in tested sports](https://www.wada-ama.org/sites/default/files/2024-09/2025list_en_final_clean_12_september_2024.pdf). Read [is sermorelin safe?](/sermorelin/guides/is-it-safe/) for sources and details.

## Keep reading

- [All sermorelin guides](/sermorelin/guides/)
- [Sermorelin online](/sermorelin/guides/online-prescription/): Why a licensed US provider beats a research-peptide seller, and how it works.
- [Results timeline](/sermorelin/guides/results-timeline/): What studies measured over time, and why before-and-after photos mislead.
- [Is sermorelin safe?](/sermorelin/guides/is-it-safe/): Known side effects, who should avoid it, and what remains unknown.
- [Sermorelin vs HGH](/sermorelin/guides/vs-hgh/): Signal versus replacement, approved uses, legal limits and safety.

**More guides:** [FDA status and legality](/sermorelin/guides/fda-approved-legal/) · [Sermorelin vs tesamorelin](/sermorelin/guides/vs-tesamorelin/) · [Providers compared](/sermorelin/guides/providers-compared/) · [Sermorelin for women](/sermorelin/guides/for-women/) · [Sermorelin and weight loss](/sermorelin/guides/weight-loss/) · [Sermorelin vs CJC-1295](/sermorelin/guides/vs-cjc-1295/) · [Sermorelin and sleep](/sermorelin/guides/sleep/) · [Sermorelin with GLP-1s](/sermorelin/guides/with-tirzepatide-or-semaglutide/) · [Stopping sermorelin](/sermorelin/guides/stopping/)

## Sources

- [Walker, Sermorelin: a better approach to management of adult-onset growth hormone insufficiency?](https://pubmed.ncbi.nlm.nih.gov/18046908/), Clin Interv Aging, 2006
- [Corpas et al., GHRH-(1-29) twice daily in older men](https://pubmed.ncbi.nlm.nih.gov/1379256/), J Clin Endocrinol Metab, 1992
- [Determination that Geref was not withdrawn for safety or effectiveness](https://www.govinfo.gov/content/pkg/FR-2013-03-04/html/2013-04827.htm), Federal Register, March 4, 2013
- [Sinha et al., Beyond the androgen receptor: growth hormone secretagogues](https://pmc.ncbi.nlm.nih.gov/articles/PMC7108996/), Transl Androl Urol, 2020
- [Khorram et al., long-term GHRH analog in age-advanced men and women](https://pubmed.ncbi.nlm.nih.gov/9141536/), J Clin Endocrinol Metab, 1997
- [Thorner et al., once daily GHRH therapy in growth hormone-deficient children](https://pubmed.ncbi.nlm.nih.gov/8772599/), J Clin Endocrinol Metab, 1996
- [2025 Prohibited List](https://www.wada-ama.org/sites/default/files/2024-09/2025list_en_final_clean_12_september_2024.pdf), World Anti-Doping Agency
- [Sermorelin and tirzepatide interaction](https://www.drugs.com/drug-interactions/sermorelin-with-tirzepatide-2055-0-4363-0.html), Drugs.com

Published by Astra, which offers sermorelin. This guide is educational and is not medical advice. Compounded medications are not FDA-approved and are not reviewed by the FDA for safety, effectiveness or quality.