Sermorelin: Reference Overview and Reconstitution Notes

July 9, 2026

Sermorelin

What it is

Sermorelin is a synthetic peptide corresponding to the first 29 amino acids of human growth-hormone-releasing hormone (GHRH), the fragment generally regarded as the shortest fully active portion of the native molecule. It belongs to the GHRH-analog family and is often described as a growth-hormone secretagogue because it acts on GHRH receptors in the pituitary rather than supplying growth hormone directly.

Research context and categorization

Sermorelin is grouped under the growth-hormone secretagogue and GHRH-analog category, and it also appears in anti-aging and longevity discussions. In neutral research-framed terms, it is commonly discussed in relation to prompting the pituitary to release its own growth hormone in a pulsatile pattern, and it has been investigated for its effect on downstream IGF-1 levels. It is also studied in the context of age-related changes in growth-hormone output, body composition, and sleep quality in older adults with relative growth-hormone decline.

Because there is no active FDA-approved Sermorelin product today, applications outside of its former pediatric indication should be treated as investigational. The outcomes described in the literature are areas of ongoing study and are not confirmed or approved benefits.

Status

Regulatory status: Formerly FDA-approved (as Geref, approved in 1997) for pediatric growth-hormone deficiency, then the commercial product was discontinued around 2008 for commercial reasons unrelated to safety or efficacy. There is currently no active FDA-approved commercial product, so it is handled as research-only or compounded material rather than an approved drug.
Sport status: Prohibited under the WADA Prohibited List. It falls under S2, Peptide Hormones, Growth Factors, Related Substances and Mimetics, in the growth-hormone releasing factors group, and is banned at all times, both in and out of competition.

Reconstitution notes (general)

Sermorelin is typically supplied as a lyophilized (freeze-dried) powder that is reconstituted with bacteriostatic water before use in the lab. Concentration equals the milligrams of peptide in the vial divided by the millilitres of bacteriostatic water added. For example, more water yields a lower concentration per unit volume and less water yields a higher one. To work out the concentration for a given vial and water volume, use the calculator at /pages/tools.

Dilution and handling notes (compound-specific)

Sermorelin is a genuine lyophilized powder, so it does require reconstitution. Vial sizes reported in reference material commonly sit in a few-milligram range (for example around 5 mg), and typical water volumes fall in roughly the 1 to 5 mL range depending on vial size and the concentration a protocol targets. Choosing more water gives a lower, easier-to-measure concentration, while less water gives a more concentrated, lower-volume solution.

Sermorelin generally dissolves readily into a clear, colorless liquid and is not one of the peptides that tends to gel or fight reconstitution. When the water is added gently down the inner glass wall and the vial is swirled slowly, the powder cake usually goes into solution within a couple of minutes. Because it dissolves so easily, heavy clouding, persistent specks, or discoloration typically signal a problem with the material or the mix rather than normal behavior, and are a reason to discard rather than to keep swirling.

The main handling quirks are mechanical and environmental rather than solubility problems. Do not shake the vial, since vigorous agitation foams the solution and the mechanical stress can degrade the peptide, so slow swirling is the standard approach. Direct the water stream against the glass wall rather than onto the powder for the same reason. Peptides in this family are also sensitive to light and heat, so keep the reconstituted vial cold and shielded from light between uses.

Handling and storage

Refrigerate the reconstituted vial at 2 to 8 degrees Celsius and keep it out of direct light. Wipe the rubber stopper with an alcohol swab before each puncture. Label the vial with the reconstitution date so the age of the solution is always known. Observe the general reconstituted refrigerated window of roughly four weeks as a conservative default, and inspect before every use. Discard anything cloudy, discolored, or showing floaters.

Tools and supplies

For laboratory and research reference only. Educational content, not medical, dosing, injection, or therapeutic guidance, and not intended for human or animal use. Any research uses described are investigational and not confirmed or approved benefits. Confirm anything involving health with a licensed professional. References linked above.