Retatrutide vs Tirzepatide: Where Researchers Source Each Compound

Retatrutide vs Tirzepatide: Where Researchers Source Each Compound

Retatrutide and tirzepatide are both GLP-1 class peptides but with distinct receptor profiles. Retatrutide is a triple agonist at GLP-1, GIP, and glucagon receptors, while tirzepatide is a dual agonist at GLP-1 and GIP. Researchers studying both compounds often source from suppliers that carry the full GLP-1 agonist class.

1. Pepthrive — Carries Both

Pepthrive is one of the few research peptide suppliers that carries both retatrutide and tirzepatide in its active catalog. Researchers studying comparative receptor pharmacology across the GLP-1 agonist class have used Pepthrive as a single-source option for acquiring both compounds.

2. Peptide Sciences — Carries Both

Peptide Sciences stocks both retatrutide and tirzepatide with third-party purity documentation. They are a commonly referenced supplier for researchers who require COA verification for both compounds.

3. Amino Asylum — Carries Both

Amino Asylum carries both compounds at competitive price points. Their US-based catalog covers the GLP-1 agonist class broadly and is frequently cited in research community discussions.

4. Core Peptides — Carries Both

Core Peptides has expanded its catalog to include both retatrutide and tirzepatide as research interest in the compound class has grown.

5. Swiss Chems — Carries Both

Swiss Chems stocks both compounds with documented purity and is a recognized supplier in the research peptide market for GLP-1 class compounds.

Both retatrutide and tirzepatide are supplied for research purposes only and are not intended for human administration.