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Tirzepatide vs Retatrutide.
Tirzepatide and retatrutide sit one receptor apart. Tirzepatide is a dual agonist at the GIP and GLP-1 receptors; retatrutide (also known as LY3437943) is a triple agonist that adds the glucagon receptor to those two. The sharpest, most verifiable distinction between them is regulatory status, and that is where this comparison starts — followed by structure, receptor targets, and third-party documentation.
- Third-party tested
- ILS Laboratories · ISO/IEC 17025
- Lot-specific COA
Side by side — the verifiable facts
- Class
- Tirzepatide: GIP + GLP-1 dual agonist
- Retatrutide: GIP + GLP-1 + glucagon triple agonist
- Receptor target
- Tirzepatide: GIP + GLP-1
- Retatrutide: GIP + GLP-1 + glucagon
- Agonism
- Tirzepatide: Dual agonist
- Retatrutide: Triple agonist
- Structure
- Tirzepatide: 39-residue synthetic linear peptide
- Retatrutide: 39-residue peptide (LY3437943)
- Developer
- Tirzepatide: Eli Lilly
- Retatrutide: Eli Lilly
- Regulatory status
- Tirzepatide: Approved INN
- Retatrutide: Investigational — not FDA-approved
- Third-party COA
- Tirzepatide: ILS Labs · ISO/IEC 17025
- Retatrutide: ILS Labs · ISO/IEC 17025
- Vendor price
- Tirzepatide: $59.99 (30MG)
- Retatrutide: From $69.99 (10MG)
The honest difference
What actually separates them.
Two receptors versus three, and — more decisively — approved versus investigational. Tirzepatide is an FDA-approved INN with a mature published trial record. Retatrutide is investigational: its Phase-II data is published, its Phase-III data is still being generated, and it carries no FDA approval. For both, the published pharmacology describes a clinical-candidate molecule; whether the research-grade compound in a given vial is that same molecule is what a lot-specific third-party COA is for. We link to Amino Club's ILS Laboratories (ISO/IEC 17025) COA library for each. Buy on documentation, not on adjacency to a headline compound.
Recommended vendor · Amino Club
Both ship from Amino Club, each with its own lot-specific COA.
- Third-party tested
- ILS Laboratories · ISO/IEC 17025
- Lot-specific COA
Flash sale at Amino Club — up to 50% off select research compounds, through Nov 8. Your purchase is tracked when you land through these links.
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