5MG
Research vial$76.99
- Lab tested & verified
- Batch COA available
- Fast fulfillment
- U.S. based support
Weight-loss research peptide
GLP3-R
Three pathways.
One compound.
24.2%mean weight reduction in Phase 2*
GLP3-R is retatrutide — the triple-agonist studied for weight loss at the GLP-1, GIP and glucagon receptors.
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
Lab tested & verifiedBatch COA availableFast fulfillmentU.S. based support
*Phase 2 trial published in NEJM, 2023. Illustrative image. Research use only. Not for human consumption.
Why GLP3-R?
Weight-loss research.
A third pathway.
Semaglutide targets GLP-1. Tirzepatide adds GIP. Retatrutide goes further with glucagon-receptor activity, opening a different direction in appetite, energy expenditure and body-weight research.
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
GLP-1
Appetite & glucose signaling
GIP
Insulin & metabolic regulation
Glucagon
Energy expenditure & hepatic function
Published weight-loss research
24.2% mean weight reduction.
One landmark Phase 2 trial.
In a 2023 study published in the New England Journal of Medicine, the highest-dose retatrutide group achieved a mean body-weight reduction of 24.2% at 48 weeks.
This was a controlled clinical trial using an investigational medicine, not Purple Peptides research vials. It does not establish results or safety for personal use.
- Body-weight endpoints
- Appetite signaling
- Energy expenditure
- Triple-receptor activity
- Glucose regulation
- Body-composition research
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
Read the published studyChoose your research size
GLP3-R research vials
Most popular
10MG
Research vial$142.99
- Lab tested & verified
- Batch COA available
- Fast fulfillment
- U.S. based support
30MG
Research vial$241.99
- Lab tested & verified
- Batch COA available
- Fast fulfillment
- U.S. based support
How it works
Three receptors.
Multiple effects.
GLP3-R is designed to interact with GLP-1, GIP, and glucagon receptors. This multi-pathway activity is what makes it one of the most interesting compounds in modern research.
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
Quality & transparency
Don't trust the label.
Check the data.
Make documentation part of your purchase. Review the product's batch-specific Certificate of Analysis for purity and identity testing before choosing your research vial.
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
View batch COAsCertificate of Analysis
- Product
- GLP3-R
- Testing
- Purity & identity
- Documentation
- Batch-specific report
How it compares
A different research profile.
| Semaglutide | Tirzepatide | GLP3-R | |
|---|---|---|---|
| GLP-1 receptor | |||
| GIP receptor | |||
| Glucagon receptor |
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
Frequently asked questions
Questions? We've got answers.
What is GLP3-R?
GLP3-R is retatrutide, an investigational peptide studied as an agonist at the GLP-1, GIP and glucagon receptors.
Where can I see the COA?
Certificates of Analysis are available on the Purple Peptides testing page. Check the certificate for the specific product and lot.
How is GLP3-R different from tirzepatide?
Tirzepatide targets GLP-1 and GIP. Retatrutide adds glucagon-receptor activity, which is studied for its effect on energy expenditure.
What size should I choose?
Select the research quantity appropriate for your laboratory protocol. Available vial sizes are 5 mg, 10 mg and 30 mg.
What did the weight-loss research show?
In the Phase 2 trial published in NEJM (2023), the highest-dose group had mean body-weight reduction of 24.2% at 48 weeks. These clinical findings are not claims for research vials or instructions for personal use.
Is this for human use?
No. Retatrutide is investigational and not approved for medical use. Products are strictly for laboratory research, not human consumption.
Buy Now — 10MG10 mg · $142.99 · Purple Peptides
Your next research purchase
Choose GLP3-R.
Source it from Purple Peptides.
5 mg, 10 mg or 30 mg. Find your research vial.
Buy Now at Purple Peptides10 mg · $142.99 · Purple Peptides
Lab tested & verified
Batch COA available
Fast fulfillment
U.S. based support
For research use only. Not for human consumption.