Buy Retatrutide Research Peptide
Retatrutide (LY3437943) is a synthetic 39-amino-acid peptide that acts at three receptors: GIP, GLP-1 and glucagon. We supply it as a lyophilized powder at 99%+ purity, verified by independent HPLC and mass spectrometry testing, in 5, 10, 20, 30, 40, 50 and 60 mg vials. Every order ships free with tracking from California. For laboratory research use only.
Retatrutide Vial Sizes and Prices
| Vial size | Price | Cost per mg | Add to cart |
|---|---|---|---|
| 5mg | $30.00 | $6.00 | Add to cart |
| 10mg | $50.00 | $5.00 | Add to cart |
| 20mg | $70.00 | $3.50 | Add to cart |
| 30mg | $90.00 | $3.00 | Add to cart |
| 40mg | $110.00 | $2.75 | Add to cart |
| 50mg | $130.00 | $2.60 | Add to cart |
| 60mgLowest cost per mg | $150.00 | $2.50 | Add to cart |
What Retatrutide Is
Retatrutide is a single synthetic peptide designed to act as an agonist at three receptors: the GIP receptor, the GLP-1 receptor and the glucagon receptor. Its 39-residue sequence includes the non-coded amino acids α-aminoisobutyric acid (Aib) and α-methyl-leucine, and one lysine side chain carries a C20 fatty diacid attached through a short linker. The fatty diacid binds serum albumin reversibly, which is why retatrutide is described as long-acting in research models.
Published work on retatrutide concentrates on multi-receptor agonist pharmacology: its relative potency at each of the three receptors, the cyclic AMP signalling each receptor produces, and how triple agonism compares with dual (GIP/GLP-1) and single-receptor reference compounds.
Retatrutide Specifications
| Compound | Retatrutide |
|---|---|
| Development code | LY3437943 |
| CAS number | 2381089-83-2 |
| Molecular formula | C221H342N46O68 |
| Molecular weight | 4731.3 g/mol |
| Length | 39 amino acids, including Aib and α-methyl-leucine, with a C20 fatty diacid on one lysine side chain |
| Receptor targets | GIP, GLP-1 and glucagon receptors |
| Form | Lyophilized powder |
| Purity | 99%+ (HPLC/MS) |
| Storage | Store lyophilized at −20 °C, protected from light |
| Vial sizes | 5, 10, 20, 30, 40, 50 and 60 mg |
Choosing a Retatrutide Vial Size
Every size is the same compound supplied to the same specification; the sizes differ only in how much material each vial holds. Larger vials carry a lower cost per mg, and the table above shows the current figure for each size. Smaller vials suit pilot work, or study designs that call for several separately opened vials rather than one large one.
Retatrutide and Tirzepatide
Tirzepatide acts at two of the same receptors, GIP and GLP-1. Retatrutide adds the glucagon receptor as a third target. Both are 39-amino-acid peptides that carry a C20 fatty diacid, so the two are often examined side by side in receptor comparison studies. Our retatrutide vs. tirzepatide vs. semaglutide comparison sets out the structural and receptor differences.
Retatrutide Research Guides
- Retatrutide Research Guide: What It Is and Why It Matters
- Retatrutide vs. Tirzepatide vs. Semaglutide: A Research Comparison
- GLP-1 Research Peptides Compared: Semaglutide, Tirzepatide, Retatrutide
Quality, Storage and Shipping
Retatrutide is supplied as a lyophilized powder at 99%+ purity, with identity and purity verified by independent HPLC and mass spectrometry testing; how we verify peptide purity explains the process. Store vials at −20 °C, protected from light. Orders are packed and dispatched from California by UPS or USPS with tracking, and shipping is free on every order. Contact us for testing documentation relating to a specific order.
Frequently Asked Questions
What is retatrutide?
Retatrutide (LY3437943) is a synthetic 39-amino-acid peptide that acts as an agonist at the GIP, GLP-1 and glucagon receptors. It carries a C20 fatty diacid that binds serum albumin reversibly.
What sizes of retatrutide are available?
Retatrutide is supplied in several lyophilized vial sizes. The table at the top of this page lists every size with its current price and cost per mg, and each size also has its own product page.
What purity is the retatrutide supplied at?
It is supplied as a lyophilized powder at 99%+ purity, verified by independent HPLC and mass spectrometry testing.
How should retatrutide be stored?
Store the lyophilized powder at −20 °C and protect it from light.
How is retatrutide different from tirzepatide?
Tirzepatide acts at the GIP and GLP-1 receptors. Retatrutide acts at both of those and at the glucagon receptor as well.
Is this retatrutide for human use?
No. It is supplied strictly for laboratory research. It is not intended for human or veterinary use, diagnosis, treatment or consumption.
Where do orders ship from?
All orders are dispatched from California by UPS or USPS with tracking. Shipping is free on every order.
For Research Use Only
This material is intended strictly for laboratory and research purposes. It is not intended for human or veterinary use, diagnosis, treatment, or consumption. By purchasing, the buyer confirms they are a qualified researcher and agrees to handle this product in compliance with all applicable regulations.