4 independent third-party assays of Sermorelin, covering 3 vendors.
Measured purity across those assays runs from 99.0% to 99.7%, median 99.4%. The spread is the point: it is variation between lots and between vendors, not a single number that describes the compound.
Assay dates span 2025-01-15 to 2025-11-19.
Manufacturer recorded on the certificate: HP RESEARCH.
Sermorelin carries an evidence grade of C on this site (Phase I–II Clinical Trials). Sermorelin is a synthetic 29-amino-acid peptide (MW ~3357.9 g/mol) corresponding to the first 29 amino acids of naturally occurring growth hormone-releasing hormone (GHRH). It was previously FDA-approved as Geref for the diagnosis and…
A certificate of analysis describes the lot that was submitted and nothing else. It is not a guarantee about a later batch, and purity is not identity — a sample can assay clean and still be the wrong compound, or the right compound at the wrong concentration. Vendors with no assay row below have not been tested here, which is not the same as having failed.
| Vendor | Assays | Median measured purity | Most recent |
|---|---|---|---|
| Growth Guys Canada | 2 | 99.7% | 2025-09-25 |
| HAPPYPEPTIDES.COM | 1 | 99.4% | 2025-01-22 |
| Mei Peptide | 1 | 99.0% | 2025-11-19 |
Compound profile: Sermorelin — evidence, mechanism and safety.
Vendors assayed: Growth Guys Canada, HAPPYPEPTIDES.COM, Mei Peptide.