How to Read a GLP-3/RT Certificate of Analysis (COA)
A Certificate of Analysis is only useful if you know which number on it matters for the compound in front of you. For GLP-3/RT, the informative checks are not the same as for a generic short peptide.
Overview
Confirm the weight near 4759.5. For this type of molecule the most valuable extra figure is a clumping measurement, because standard purity testing can read high while clusters are present — the testing conditions tend to break those clusters apart before they are seen.
What GLP-3/RT actually is
GLP-3/RT is an engineered molecule built to act on three receptors at once, all belonging to the system of hormones your gut releases around eating. Getting one chain to fit three different targets well is a genuinely hard design problem, which is why molecules like this appeared years after simpler ones.
Supplied for laboratory research use only — not for human or animal use.
Third-party tested by HPLC and LC-MS, ≥99% purity, with a Certificate of Analysis on every order. Ships across Canada.
Technical detail below
Assays that are informative for GLP-3/RT
What to check on the COA
Confirm the mass near 4759.5 Da. For lipidated peptides the most valuable extra data point is aggregate content by size-exclusion chromatography — RP-HPLC purity can read high while soluble aggregates are present, because aggregates often dissociate under the organic mobile phase.
Deletion sequences from the long synthesis, incompletely acylated chains, and soluble aggregates.
Verify a Popular Peptides batch
Every batch is third-party tested by HPLC and LC-MS with a published Certificate of Analysis (≥99% purity). Enter a lot number to pull the COA for the exact vial in front of you.
What GLP-3/RT is studied for
The defining feature: simultaneous GIP, GLP-1, and glucagon receptor activity from one chain.
Glucagon-receptor activity is studied for its contribution to energy expenditure, distinguishing triagonists from dual agonists.
Investigated in metabolic research models for effects on glucose homeostasis.
A major focus of the preclinical literature on this compound class.
Summarizes published preclinical literature — see the selected references below. Provided for research reference only; not a claim of efficacy or a description of human use.
- Jastreboff AM, Kaplan LM, Frías JP, et al. Triple–Hormone-Receptor Agonist GLP-3/RT for Obesity — A Phase 2 Trial. N Engl J Med. 2023.
- Browse current GLP-3/RT literature on PubMed
References describe in-vitro and preclinical research and are listed for reference only — not evidence of efficacy and not a description of human use.
More GLP-3/RT reference
Lyophilized and reconstituted storage conditions, plus the practical working window.
Diluent selection, dissolution behaviour, and the calculator preset for this compound.
Which solvents work, why, and what abnormal dissolution behaviour indicates.
The specific chemical routes by which this molecule breaks down, and how to limit each.
Compound-specific bench practices, and the errors most often made with this molecule.
What to inspect on arrival, and which conditions actually warrant rejecting a vial.
Questions specific to this compound — structure, chemistry, and common misconceptions.
Purity & COA reference for other compounds
Reviewed for research-use compliance by Kobi Williams, Founder — Popular Peptides Canada. Last reviewed 22 July 2026.
GLP-3/RT is supplied strictly as a research chemical for in-vitro laboratory and research use only. It is not intended for human or animal consumption, diagnostic, or therapeutic use. This page is educational laboratory-handling reference information — not medical advice, not usage guidance, and not a protocol.