Tesamorelin vs Ipamorelin
A side-by-side research comparison — classification, molecular weight, mechanism, and how each is verified. For laboratory research use only.
01At a Glance
| Tesamorelin | Ipamorelin | |
|---|---|---|
| Classification | Endocrine | Endocrine |
| Molecular weight | 5,135.9 g/mol | 711.85 g/mol |
| Also known as | TH9507 | NNC 26-0161 |
| 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
Tesamorelin
A stabilized GHRH(1-44) analog studied for growth-hormone-axis and lipid metabolism.
Tesamorelin is a stabilized analog of the full-length growth-hormone-releasing hormone GHRH(1-44). As a GHRH-receptor agonist it is studied for stimulation of endogenous growth-hormone secretion and downstream IGF-1 signaling.
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.
Research framing only · No human-use claims
03Selecting for a Research Model
Because Tesamorelin and Ipamorelin are both endocrine research compounds, they are frequently evaluated against one another. Selection depends on the research question, model system, and endpoints. Both are supplied strictly for 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 Tesamorelin and Ipamorelin?
Tesamorelin is a endocrine research compound — A stabilized GHRH(1-44) analog studied for growth-hormone-axis and lipid metabolism. Ipamorelin is also studied within the endocrine area — A selective ghrelin-receptor agonist studied for clean growth-hormone secretagogue activity. They differ in molecular weight (Tesamorelin: 5,135.9 g/mol; Ipamorelin: 711.85 g/mol). Both are for laboratory research use only.
What are the molecular weights of Tesamorelin and Ipamorelin?
Tesamorelin: 5,135.9 g/mol. Ipamorelin: 711.85 g/mol.
Are Tesamorelin and Ipamorelin in the same research class?
Yes — both are categorized as Endocrine research compounds.
How are Tesamorelin and Ipamorelin tested?
Both are analyzed by an independent third-party laboratory (MZ Biolabs, Arizona) on a five-point panel — HPLC purity, mass-spec identity, endotoxin, heavy metals, and sterility — with a batch-specific Certificate of Analysis per lot.