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GLP-3 research: overview and resources

What GLP-3 research material is, how it is characterized, and where to find every specification, method, lot record and reference GLP3 Peptide Co. publishes about it.

Published October 2, 2026. Updated October 2, 2026. By the GLP3 Peptide Co. Research Team.

What is GLP-3?

"GLP-3 peptide" is the informal name researchers use for GLP-3 RT, a 39-residue synthetic peptide built to act on three receptors at once: GIPR, GLP-1R and the glucagon receptor. There is no natural hormone called GLP-3; the name describes the triple-receptor design. Its formula is C221H342N46O68 and its average molecular weight 4731.33 g/mol, and those two numbers are what every certificate checks the material against.

GLP3 Peptide Co. lists GLP-3 RT in 10 mg and 15 mg and 30 mg vials, currently $64.99 to $159.99 through Klow.bio. The newest lot, KB89232, reported 99.98% HPLC purity with LC-MS identity confirmed, and the full certificate for every lot is linked here.

"GLP-3" is an informal name for this three-receptor design. It does not refer to a naturally occurring hormone; there is no endogenous peptide called GLP-3. That is why GLP3 Labs identifies the material by its molecular data and lot results rather than by name alone.

What is GLP-3 research material?

GLP-3 research material is GLP-3 RT supplied for laboratory research (C221H342N46O68, 4731.33 g/mol) in white lyophilized powder form, sold by lot. Each lot's identity, purity and net content are documented by an independent laboratory in a published certificate of analysis.

How is GLP-3 characterized?

Three questions are answered for every lot, each by a different method:

  • Is it the right compound? LC-MS compares observed ions with values calculated from the molecular weight.
  • How much of the sample is that compound? HPLC-UV reports the main peak's share of detected peak area. Current lots: 99.67%–99.98%.
  • How much peptide is in the vial? Net content is measured directly.

Endotoxin (LAL) and microbial DNA (PCR) results are added where those tests are run.

What has not been established

A certificate of analysis describes the specific sample tested on its test date. It does not establish stability afterward, sequence order beyond what mass confirmation shows, results for other lots, or suitability for any particular purpose.

GLP-3 at a glance

Product
GLP-3 RT
Type
Synthetic research peptide, 39 residues
Receptor design
GIP receptor (GIPR), GLP-1 receptor (GLP-1R) and glucagon receptor (GCGR)
Molecular formula
C221H342N46O68
Molecular weight
4731.33 g/mol (average)
Form
White lyophilized powder
Vial sizes
10 mg, 15 mg, 30 mg
Purity, current lots
99.67%–99.98% (HPLC-UV)
Purity specification
≥95%
Identity
Confirmed by LC-MS on every lot
Testing laboratory
Freedom Diagnostics (independent)
Current lot
KB89232, reported Aug 15, 2026
Operated by
Klow Labs LLC, Chicago, IL
Where to order
klow.bio

GLP-3 research resources

Every GLP-3 resource on glp3peptide.bio, organized from chemistry to documentation.

Chemistry

GLP-3 specifications

Formula, molecular weight, sequence, modifications and release specification.

 Chemistry

Molecular characteristics

Structure, composition and what it means for identity testing.

 Quality

Quality and supply chain

Sourcing, specifications, batch documentation and release.

 Testing

Analytical testing

How every lot is tested, reviewed and released.

 Testing

HPLC analysis of GLP-3

Retention time, peaks, area normalization and results by lot.

 Testing

LC-MS analysis of GLP-3

Charge states, expected vs. observed ions and mass error by lot.

 Documentation

Certificates of analysis

Every lot's full results, plus the complete testing records.

 Documentation

How to read a GLP-3 COA

What each section means and what a COA does and doesn't establish.

 Documentation

Verify a lot

Look up any GLP-3 lot by the number on the vial.

 Analysis

Purity, content and net content

Three different numbers, kept apart.

 Handling

Storage and stability

Degradation pathways and lyophilized peptide handling.

 Reference

Glossary

Definitions for every term on a GLP-3 certificate.

 Research material

GLP-3 RT research material

Sizes, current lots and availability. Purchasing is handled through Klow.bio.

Research references

Published sources

  1. NCBI Gene: GIPR (gastric inhibitory polypeptide receptor). National Center for Biotechnology Information, NIH. www.ncbi.nlm.nih.gov/gene/2696
  2. NCBI Gene: GLP1R (glucagon-like peptide 1 receptor). NIH. www.ncbi.nlm.nih.gov/gene/2740
  3. NCBI Gene: GCGR (glucagon receptor). NIH. www.ncbi.nlm.nih.gov/gene/2642
  4. PubChem: 2-Aminoisobutyric acid. National Library of Medicine, NIH. pubchem.ncbi.nlm.nih.gov/compound/2-Aminoisobutyric-acid
  5. Wilm M. Principles of electrospray ionization. Mol Cell Proteomics. 2011. PMC3134074. pmc.ncbi.nlm.nih.gov/articles/PMC3134074
  6. U.S. FDA. Q2(R2) Validation of Analytical Procedures. 2024. fda.gov
  7. U.S. FDA. Pyrogen and Endotoxins Testing: Questions and Answers. Revised 2026. fda.gov

GLP3 Peptide Co. analytical documentation

Editorial scope

GLP3 Peptide Co. research content covers molecular characteristics, peptide structure, analytical chemistry, purity and identity testing, certificates of analysis, lot documentation and laboratory storage and handling.

It does not cover dosing, administration instructions, protocols, personal use or medical advice.

Latest updates

All research updates

Buy GLP-3

10 mg, 15 mg and 30 mg vials. Current lot KB89232 tested at 99.98% purity with identity confirmed by LC-MS. Current purchasing is available through Klow.bio.

Buy GLP-3 See every lot's COA