99%+ Purity with 3rd party testing 
10% off first order 
Volume Discounts 
Fast & Free Shipping 
Refund Guarantee 
24/7 Customer Service 
Legal Disclaimer
All products on this site are for research and development, laboratory, or analytical use only; they are not for human consumption, medical, diagnostic, cosmetic, veterinary, or any other non-research application. The statements and products have not been evaluated by the U.S. Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease. Honest Peptide is not a compounding pharmacy or chemical compounding facility as defined under section 503A of the Federal Food, Drug, and Cosmetic Act, nor an outsourcing facility as defined under section 503B.
GLP-3 R
$130.00
GLP-3 R is a synthetic, triple-agonist peptide targeting gastric inhibitory polypeptide (GIP), glucagon-like peptide-1 (GLP-1), and glucagon receptors.
Save up to 15% when you buy more!
| Quantity | Discount | Price |
|---|---|---|
| 1 | 0% | $130.00 |
| 2 - 5 | 5% | $123.50 |
| 6 - 10 | 10% | $117.00 |
| 11 - 15 | 15% | $110.50 |
Product details
Amino Acid Sequence
Tyr-{Aib}-Gln-Gly-Thr-Phe-Thr-Ser-Asp-Tyr-Ser-Ile-{α-Me-Leu}-Leu-Asp-Lys-{diacid-C20-γ-Glu-(AEEA)-Lys}-Ala-Gln-{Aib}-Ala-Phe-Ile-Glu-Tyr-Leu-Leu-Glu-Gly-Gly-Pro-Ser-Ser-Gly-Ala-Pro-Pro-Pro-Ser-NH₂
Molecular Formula
C₂₂₁H₃₄₂N₄₆O₆₈
Molecular Weight
4 731.33 g/mol
PubChem CID
485 663 353
CAS Number
2381089-83-2
Vial Size
3ml
Contents
Lyophilized powder, white/off-white color
Mechanism of action
Triple GIP/GLP-1/GCGR Receptor Agonism & Insulinotropic Effect
GLP-3 R simultaneously engages GIP, GLP-1, and glucagon receptors on pancreatic β-cells, amplifying cAMP signaling to enhance glucose-dependent insulin secretion and suppress glucagon release.
Delayed Gastric Emptying & Reduced Gastrointestinal Motility
Activation of GLP-1 receptors in the gut and on vagal afferents slows gastric emptying and intestinal transit, reducing postprandial glucose excursions and contributing to satiety.
Central & Peripheral Appetite Suppression
In preclinical models, retatrutide crosses the blood–brain barrier to engage hypothalamic pathways that reduce caloric intake, while glucagon receptor activation increases energy expenditure—together driving significant weight reduction .
Storage & handling
Storage:
Store the lyophilized vial in a cool, dry area protected from direct sunlight.
Certificate of Analysis
99%+ Purity
Guaranteed
30-day return policy
Rigorous
Testing
Always 3rd party tested
Fast & Free
Shipping
Sent same day
Free over $150
Customer
Service
24/7 Chat & Email
Related products
FAQs
Why Honest Peptide?
- Rigorous Testing, No Exceptions: Every batch is 3rd-party tested for purity, weight, and toxins—so you can shop with total confidence.
- Priced Right: As a family business, we keep costs low and pass the savings directly to you.
- Here for You: Fast shipping and real human support, every single time.
Do you test your products and provide COAs?
Yes! Every product goes through multiple 3rd-party tests to verify purity, accurate weight, and that it’s toxin-free. Each test result is documented in a Certificate of Analysis (COA), which you can download directly from each product page or from our centralized COA library.
What if I have more questions?
We’re here to guide and support. Please reach out to hello@honestpeptide.com and we’ll respond within 1 business day.
What is your shipping policy?
Your order will be processed in 1–2 business days from the East Cost and shipped with UPS or FedEx Ground (2-5 business days). At this time, we only ship to the United States.
How should I store my peptides?
In lyophilized (powder) form, store in freezer for up to 2 years. In reconstituted form, store in fridge and use in 4-8 weeks.
What is your refund policy?
We are serious about customer satisfaction. If you are not happy with your order, please reach out within 30 days and we will replace or refund your order**.**
Subscribe
Unlock 10% off
