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Metabolic Peptide

GLP-3 RT

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GLP-3 RT is a 39-amino acid triple receptor agonist targeting GLP-1, GIP, and glucagon receptors, studied in clinical trials for its effects on weight reduction and metabolic regulation.

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Description

What is GLP-3 RT?

GLP-3 RT (LY3437943) is a synthetic 39-amino acid peptide that acts as a triple agonist of the glucagon receptor (GCGR), glucose-dependent insulinotropic polypeptide receptor (GIPR), and glucagon-like peptide-1 receptor (GLP-1R).

By targeting three metabolic receptors simultaneously, GLP-3 RT represents the next evolution beyond dual-action peptides like GLP-2 TZ. The glucagon receptor component adds the potential for increased energy expenditure and fat breakdown, while GIP and GLP-1 activation address insulin secretion and appetite regulation.

In Phase II clinical trials, GLP-3 RT demonstrated substantial weight reduction, with some participants achieving over 24% body weight loss over 48 weeks. Phase III trials are currently underway.

GLP-3 RT is not approved by the FDA for any medical use. Research-grade product is sold strictly for laboratory and research purposes only.


Research Applications

Areas of Investigation
Triple Action

Triple Receptor Agonism

The first triple-acting peptide targeting GLP-1, GIP, and glucagon receptors simultaneously for synergistic metabolic effects.
Weight Loss

Body Weight Reduction

Demonstrated substantial weight loss in Phase II trials, with some participants achieving over 24% body weight reduction.
Fat Burning

Energy Expenditure

Glucagon receptor activation is studied for its potential to increase thermogenesis and fat oxidation.
Blood Sugar

Glucose Regulation

Investigated for glucose-lowering effects through combined GLP-1 and GIP receptor activation.
Liver Health

Liver Health

Under evaluation for effects on metabolic dysfunction-associated steatotic liver disease in clinical trials.

Compound Profile

Technical specifications
What is GLP-3 RT?

Molecular Profile


Sequence
YXQGTFTSDYSI xLLDKK* AQXAFIEYLLEG GPSSGAPPPS NH₂
Molecular Formula
C₂₂₁H₃₄₂N₄₆O₆₈
Molecular Weight
4,731.33 g/mol
Appearance
White lyophilized powder

Form

Lyophilized (freeze-dried)
Handling & Shelf Life Guidelines

Storage & Stability


Storage (Pre-Reconstitution)

Store below -20°C, desiccated, away from light and moisture.
Storage (Post-Reconstitution)
Refrigerate at 2–8°C. For longer storage, aliquot and store below -18°C. Avoid freeze-thaw cycles.
Shelf Life
24 months from date of manufacture when stored as directed
Sensitivity Notes
Sensitive to heat, light, and moisture. Keep sealed until use.
Compliance & Clinical Overview

Regulatory & Research Status


FDA Status
Not approved for human use. Investigational compound in active clinical trials.
WADA Classification
Not currently listed (subject to change as regulatory status evolves).
Clinical Trial Status
Growing body of preclinical and clinical research on triple-receptor agonism, weight management, and metabolic outcomes.
Published Studies
Growing body of preclinical and clinical research on triple-receptor agonism, weight management, and metabolic outcomes.
Research Disclaimer
For laboratory and research purposes only. Not intended for human consumption.

COA's (Certificate of Analysis)

Third Party Tested by Freedom Diagnostics
99.87%
Purity
Variant
GLP RT
Lot #
GLZ-GLP-3-RT-10MG-A
Labelled
10mg
Actual
11.41mg
Tested
3/29/2026
View COA
99.40%
Purity
Variant
GLP RT
Lot #
GLZ-GLP-RT-15MG-A
Labelled
15mg
Actual
15.26mg
Tested
12/12/2025
View COA
99.73%
Purity
Variant
GLP RT
Lot #
GLZ-GLP-RT-30MG-A
Labelled
30mg
Actual
30.39mg
Tested
2/9/2026
View COA
99.77%
Purity
Variant
GLP RT
Lot #
GLZ-GLP-RT-50MG-A
Labelled
50mg
Actual
54.25mg
Tested
12/12/2025
View COA

Frequently Asked Questions

Common questions about GLP-3 RT research
What is GLP-3 RT?+
GLP-3 RT is a synthetic 39-amino acid peptide that targets three metabolic receptors: GLP-1, GIP, and glucagon.
How does GLP-3 RT differ from GLP-1 SM and GLP-2 TZ?+
GLP-1 SM targets only GLP-1. GLP-2 TZ targets GLP-1 and GIP. GLP-3 RT adds a third target, the glucagon receptor, which may contribute to increased energy expenditure and fat metabolism.
How should GLP-3 RT be stored?+
Lyophilized GLP-3 RT should be stored below -20°C, away from light and moisture. Once reconstituted, refrigerate at 2–8°C and use within 7 days.
What clinical trials have been conducted?+
Phase II trials showed significant weight loss and metabolic improvements. Phase III trials are currently underway for obesity, type 2 diabetes, and liver disease.
Is GLP-3 RT FDA approved?+
No. GLP-3 RT is an investigational compound not approved by the FDA. It is sold for laboratory and research purposes only.

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Every batch is independently tested, documented, and tied to a specific lot number prior to release. If documentation is missing or inconsistent, we will make it right.