Retatrutide is one of the most discussed research peptides within metabolic research. In this guide we explain, with sources and strictly research-only, what Retatrutide is and how it is studied in research — without any health or weight-loss claims.
Retatrutide is a synthetic research peptide that, in research, acts on three receptors at once (GIP, GLP-1 and glucagon) — a so-called triple agonist. It is studied in clinical trials, but is not approved as a medicine and is offered here exclusively for research. Every batch is lab-verified at ≥99% purity.
What is Retatrutide?
Retatrutide is a synthetic peptide described in research as a ‘triple agonist’: it targets three receptors at once. Where many well-known metabolic peptides act on one or two receptors, Retatrutide adds a third. That combination makes it an intensively studied molecule. Want the basics first? Read what peptides are.
How does Retatrutide work in research?
In research, Retatrutide acts on the GIP, GLP-1 and glucagon receptor — three links in metabolic regulation. The table below lists the three targets as they are described in scientific research.
These descriptions concern the mechanism of action as studied in research and are not evidence of effect in humans.
Retatrutide versus other metabolic peptides
What sets Retatrutide apart is the third target — the glucagon receptor — on top of GIP and GLP-1. As a result it is often compared with dual agonists. We work through that comparison in Retatrutide vs Tirzepatide.
Status: research and approval
Retatrutide is studied in clinical trials, but is not approved as a medicine. Terms you come across online about weight or losing weight belong to that research context and are not an established or approved result. That is why, at Peptide Lab, Retatrutide is offered exclusively as a research compound.
Retatrutide is exclusively for laboratory and research purposes. It is not a medicine, not a weight-loss product and not intended for human or animal consumption. No medical, health or weight-loss claims are attached to it.
Purity, COA and buying for research
At Peptide Lab every Retatrutide batch is lab-verified at ≥99% purity, with documentation per batch. Purity is determined by HPLC and confirmed by mass spectrometry — read how to read a COA. See details, price and availability on the Retatrutide product page, or explore the Fat loss & metabolism category.
Frequently asked questions about Retatrutide
What is Retatrutide?
Retatrutide is a synthetic research peptide described as a 'triple agonist': in research it targets three receptors at once — the GIP, GLP-1 and glucagon receptor. It is studied within metabolic research and is not an approved medicine.
How does Retatrutide work in research?
In research, Retatrutide acts on three receptors involved in the regulation of appetite, blood sugar and energy balance. Because it works on several pathways at once, it is an intensively studied molecule in metabolic research.
Is Retatrutide approved as a medicine?
No. Retatrutide is studied in clinical trials, but is not approved as a medicine. At Peptide Lab it is offered exclusively as a research compound, for laboratory and research purposes.
What is the difference from tirzepatide?
Tirzepatide is a dual agonist (GIP and GLP-1), whereas Retatrutide adds a third target: the glucagon receptor. We compare the two in more detail in the article Retatrutide vs Tirzepatide.
What is Retatrutide studied for?
Retatrutide is studied within metabolic research in relation to appetite regulation, blood sugar and energy balance. This concerns research; no health or weight-loss claims are attached to it.
Sources & further reading
Independent third-party references — for further reading, not an endorsement or partnership.
- Dr. Peter Attia, MD — Scientific analyses of longevity and a critical view of peptide and hormone hype
