GLP-1 & Incretin Research Peptides

This page is the category guide to the GLP-1 and incretin research peptides we supply. It describes the class as a whole — what these compounds are, the receptor families that define them, and how the individual materials relate to one another — and links through to the detailed guides and specifications for each compound. It is written for researchers comparing materials at the class level; for compound-level detail, follow the links to the individual guides and catalogue entries throughout.

Everything here is factual and educational. It summarises how this group of compounds is described in published research and handled as laboratory material. It is not guidance for the use of any material in humans or animals, and it makes no claim about safety, performance or outcomes. For background on how research compounds are classified and supplied, see Understanding Research Compounds.

GLP-1 stands for glucagon-like peptide-1, one of the body’s incretin hormones. In a research context, the phrase “GLP-1 research peptides” refers to synthetic peptides studied for their activity at the GLP-1 receptor and, in many designs, at related incretin receptors as well. They are short, defined amino-acid chains produced by peptide synthesis, supplied as lyophilised material, and handled as research compounds. For the underlying chemistry, see What Is a Peptide? and Understanding Peptide Sequence Notation.

What groups these compounds together is the receptor system they are designed to engage, not any single sequence or origin. Reports in the literature typically identify each one by both a developmental code and a generic name, and describe it in terms of which incretin-related receptors it acts at. That receptor design is the organising idea behind everything on this page.

Incretins are gut-derived hormones that participate in metabolic regulation. The two most studied are GLP-1 (glucagon-like peptide-1) and GIP (glucose-dependent insulinotropic polypeptide), each acting at its own receptor. A third, closely related target studied alongside them is the glucagon receptor. Much of the interest in this class follows from a simple structural idea: a single engineered peptide can be built to engage more than one of these receptors at once, which makes it a useful tool for studying incretin biology and receptor pharmacology.

The sections below describe the receptor activities a given peptide is designed to study. These descriptions are factual classifications drawn from published research; they describe receptor activity investigated in the laboratory and are not statements about any effect in a person or animal.

Within this class, compounds are commonly grouped by how many receptor systems a single molecule is designed to engage. The progression below is the line of work the research literature tends to follow.

Single-receptor (GLP-1) agonists

The earliest and simplest design: a peptide built to act at the GLP-1 receptor alone. These molecules established the GLP-1 receptor as a research target and remain a common reference point against which dual- and triple-receptor designs are compared.

Dual (GIP/GLP-1) agonists

A single chain engineered to act at two incretin receptors — GIP and GLP-1 — on the reasoning that engaging both together offers a richer tool for studying incretin biology than either alone. Tirzepatide is the dual-agonist material in our catalogue.

Triple (GLP-1/GIP/glucagon) agonists

The most recent step in this progression: a single molecule designed to act at three receptor systems at once, adding glucagon-receptor activity to the GIP and GLP-1 pair. Retatrutide is the triple-agonist material in our catalogue.

The table below compares the incretin research peptides currently in our catalogue on a factual basis — the receptors each is designed to engage, its agonist class and the format it is supplied in. It is a comparison of how the materials are described and handled, not of any effect. Follow the links for the full compound guides and product specifications.

Each compound has its own set of factual guides — an introductory profile, a research overview of areas of published study, and a storage & handling guide for the material.

Retatrutide (triple agonist)

• What Is Retatrutide?
• Retatrutide Research Overview
• Retatrutide Storage & Handling Guide

Tirzepatide (dual agonist)

• What Is Tirzepatide?
• Tirzepatide Research Overview
• Tirzepatide Storage & Handling Guide

Across the class, the practical considerations are the same as for any lyophilised research peptide: confirm the material against its specification on receipt, keep it in the stated storage conditions, and maintain clear records. The specification supplied with a given material is always the definitive reference for that material. For the general principles, see Understanding Research Material Specifications, How to Read a Certificate of Analysis and Peptide Storage Guidelines. Each compound’s own storage & handling guide, linked above, covers any points specific to that material.

The materials described here are available in the catalogue, each with its full specification and storage information: Retatrutide and Tirzepatide. The complete range can be viewed in the research catalogue, and our overall approach to material consistency is described on the Quality page.

For laboratory research use only. Not for human or animal consumption. The material on this page is educational and factual: it summarises how a class of research compounds is described in published study and handled in the laboratory. It is not guidance for the use of any material in humans or animals, and nothing here should be read as a claim about safety, performance or outcomes. Where a product specification is provided with a material, that document is the definitive reference and takes precedence over any general information given here.