Ipamorelin vs GHRP-2
A side-by-side research comparison — classification, molecular weight, mechanism, and how each is verified. For laboratory research use only.
01At a Glance
| Ipamorelin | GHRP-2 | |
|---|---|---|
| Classification | Endocrine | Endocrine |
| Molecular weight | 711.85 g/mol | 817.97 g/mol |
| Also known as | NNC 26-0161 | Pralmorelin; KP-102 |
| Purity spec | ≥99% HPLC | ≥99% HPLC |
| Verification | MZ Biolabs · 5-panel | MZ Biolabs · 5-panel |
| Use | Research Use Only | Research Use Only |
02How They Differ
Ipamorelin
A selective ghrelin-receptor agonist studied for clean growth-hormone secretagogue activity.
Ipamorelin is a synthetic pentapeptide and selective agonist of the ghrelin receptor (GHS-R1a). In research models it stimulates growth-hormone release from the pituitary with notable selectivity — published work emphasizes minimal effect on prolactin, cortisol, and ACTH compared with earlier secretagogues.
GHRP-2
A growth-hormone-releasing hexapeptide studied for GHS-R agonism.
GHRP-2 (pralmorelin) is a synthetic hexapeptide that acts as an agonist at the growth-hormone secretagogue receptor (GHS-R1a), stimulating growth-hormone release from the pituitary in research models.
Research framing only · No human-use claims
03Selecting for a Research Model
Because Ipamorelin and GHRP-2 are both endocrine research compounds, they are frequently evaluated against one another. Selection depends entirely on the research question, model system, and endpoints being measured. Both compounds are supplied strictly for in-vitro and laboratory research and are not for human or veterinary use.
Whichever you select, every Ethos Bio lot is verified the same way — a five-point independent panel with a batch-specific Certificate of Analysis. See how we test →
04FAQ
What is the difference between Ipamorelin and GHRP-2?
Ipamorelin is a endocrine research compound — A selective ghrelin-receptor agonist studied for clean growth-hormone secretagogue activity. GHRP-2 is also studied within the endocrine area — A growth-hormone-releasing hexapeptide studied for GHS-R agonism. They differ in molecular weight (Ipamorelin: 711.85 g/mol; GHRP-2: 817.97 g/mol) and primary mechanism. Both are supplied for laboratory research use only.
What are the molecular weights of Ipamorelin and GHRP-2?
Ipamorelin has a molecular weight of 711.85 g/mol. GHRP-2 has a molecular weight of 817.97 g/mol.
Are Ipamorelin and GHRP-2 in the same research class?
Yes — both Ipamorelin and GHRP-2 are categorized as Endocrine research compounds, which is why they are often compared.
How are Ipamorelin and GHRP-2 tested?
Both are analyzed by an independent third-party laboratory (MZ Biolabs, Arizona) on a five-point panel — HPLC purity, mass-spectrometry identity, endotoxin, heavy metals, and sterility — with a batch-specific Certificate of Analysis provided per lot.