Sermorelin is a 29-amino-acid GHRH analogue popular for GH research. Cheaper and shorter than tesamorelin, but frequently confused with or substituted for it on the Australian grey market.
Growth hormone releasing hormone analogue
Also known as: GHRH (1-29)
Why test Sermorelin?
Sermorelin and tesamorelin look similar on a label but have different molecular weights and very different pharmacology. LC-MS identity confirms which one is actually in the vial. Quantitative HPLC catches under-fill.
Common issues we find
Substitution mix-ups with tesamorelin or CJC-1295
Under-fill - labelled 5 mg, contains 3-4 mg
Low purity (<92%) from incomplete synthesis
Frequently asked questions
How is sermorelin tested?
LC-MS for identity, HPLC for purity, and quantitative HPLC for actual mg per vial. A$549 per vial at LabDoc, COA in 3-7 business days.
What's the difference between sermorelin and tesamorelin?
Sermorelin is GHRH(1-29). Tesamorelin is a modified sermorelin with an extended half-life. Tesamorelin is roughly 2× the molecular weight - LC-MS resolves the difference clearly.
What's the difference between sermorelin and CJC-1295?
CJC-1295 is sermorelin with extra modifications for stability (and DAC for half-life extension). They are pharmacologically related but distinct. LC-MS identity confirms which one is in the vial.
What purity should sermorelin be?
Reference-grade sermorelin is ≥97% by HPLC. Anything under 92% likely contains significant truncated-peptide content from incomplete synthesis.
Can LabDoc test sermorelin blended with other peptides?
Yes - blends are tested as a single sample with per-peptide breakdown on the COA. A two-peptide blend adds A$200 and a three-peptide blend A$300, so identity, purity and content on a two-peptide blend is A$749 per vial.