Retatrutide vs Semaglutide
Quick Answer
The core difference is receptor breadth. Retatrutide (LY3437943) is a triple agonist of the GLP-1, GIP, and glucagon receptors; Semaglutide is a single GLP-1 receptor agonist. In metabolic research the triple-agonist profile makes Retatrutide a distinct study target. Both are ≥99% HPLC-verified at Peptide.Express for in-vitro research only.
Retatrutide vs Semaglutide: At a Glance
| Attribute | Retatrutide | Semaglutide |
|---|---|---|
| Receptor agonism | Triple: GLP-1 / GIP / glucagon | Single: GLP-1 |
| Research code | LY3437943 | — |
| Class | Triple incretin agonist | GLP-1 receptor agonist |
| CAS number | 2381089-83-2 | 910463-68-2 |
| Research area | Energy balance, metabolic signaling | GLP-1 metabolic signaling |
| Purity (Peptide.Express) | ≥99% HPLC verified | ≥99% HPLC verified |
How Retatrutide and Semaglutide Differ in Research
Retatrutide and Semaglutide are both incretin-pathway research compounds, but they differ in receptor breadth. Semaglutide is a single GLP-1 receptor agonist, whereas Retatrutide (LY3437943) is a triple agonist acting at the GLP-1, GIP, and glucagon receptors simultaneously.
For metabolic research, that triple-agonist mechanism is what makes Retatrutide a distinct entity rather than a newer version of the same target. Study designs investigating multi-receptor energy-balance signaling treat the two compounds as mechanistically different tools.
Both are supplied by Peptide.Express at ≥99% HPLC-verified purity with a Certificate of Analysis. All material is for in-vitro laboratory research and educational use only — no human or therapeutic use is implied.
Frequently Asked Questions
What is the difference between Retatrutide and Semaglutide?
Retatrutide is a triple GLP-1/GIP/glucagon receptor agonist, while Semaglutide is a single GLP-1 receptor agonist. The added GIP and glucagon activity is the defining research distinction. For laboratory research use only.
Is Retatrutide stronger than Semaglutide?
They are not directly ranked here — they are mechanistically different research tools (triple vs single receptor agonism). Comparative claims about potency in humans are outside research-use framing and are not made.
Are both available at the same purity?
Yes — both Retatrutide and Semaglutide are HPLC-verified at ≥99% purity with a Certificate of Analysis included.