Research Overview
Retatrutide, known by the development code LY3437943, is a synthetic peptide studied as a triple incretin receptor agonist. It is engineered to engage three receptors simultaneously — the GIP receptor, the GLP-1 receptor and the glucagon receptor — placing it on the most complex rung of the single / dual / triple agonist ladder described in our GLP Research Overview.
It is supplied as a lyophilized powder for laboratory research and is studied in receptor-binding assays, cell-based signaling models and comparative pharmacology work alongside other incretin agonist peptides.
Mechanism Summary
Retatrutide is studied as an agonist at three G-protein-coupled receptors. Engaging the GIP, GLP-1 and glucagon receptors together produces a combined signaling profile that researchers examine through downstream readouts such as cyclic AMP (cAMP) accumulation in cell-based assays. The research interest in a triple agonist is the opportunity to study how concurrent activation of all three incretin pathways differs from single- or dual-receptor engagement under controlled conditions.
Reference Data
| Compound name | Retatrutide |
|---|---|
| Synonyms | LY3437943 |
| CAS number | 2381089-83-2 |
| Molecular formula | C221H342N46O68 (reported) |
| Molecular weight | ≈ 4731.4 g/mol |
| Peptide class | Triple incretin receptor agonist (GIP / GLP-1 / glucagon) |
| Physical form | Lyophilized powder |
| Purity | ≥ 99% identity — verified by COA on every batch |
Molecular values are provided as published reference figures for research identification. Always confirm against the batch-specific Certificate of Analysis.
Research Applications
In laboratory research, retatrutide is commonly studied in:
- Triple receptor-binding and receptor-activation assays
- cAMP and downstream signaling readouts in cell-based models
- Comparative potency profiling against dual and single agonists
- Structure-activity relationship (SAR) research
- Peptide stability, formulation and reconstitution studies
Storage Information
Lyophilized retatrutide is the most stable form and should be stored cold and protected from light and moisture until use. Once reconstituted with bacteriostatic water, the working solution becomes considerably more sensitive — keep it refrigerated and use it within a limited window. Full handling protocols are in the Lyophilized Storage Guide, and the Reconstitution Calculator will compute concentration and draw volumes for any vial size.
Retatrutide is sold strictly for laboratory and in-vitro research. It is not for human consumption, veterinary use, or any diagnostic or therapeutic application. Nothing on this page is medical, dosing, or therapeutic advice.