Retatrutide · LY3437943
Retatrutide Peptide
Freeze-dried retatrutide peptide in a closed glass vial. Available for purchase online solely for laboratory research.
$125.00
per vial
Size
Quantity
Description
Retatrutide (LY3437943) is a research peptide classified as a GGG triple agonist, capable of engaging the GLP-1, GIP, and glucagon receptors all at once. It is supplied as a lyophilized powder of high purity inside a sealed glass vial, and every batch undergoes third-party laboratory testing before being sent out. If you buy retatrutide online through this page, the COA specific to your batch can be viewed publicly before you complete your purchase.
- A purity level of 98% or above is guaranteed, and the exact figure for the current batch appears on the COA.
- Identity is confirmed through mass spectrometry, while purity is determined by HPLC.
- Endotoxin and sterility assessments are carried out, and each vial is marked with a lot number.
- Orders are dispatched from the USA within 1-2 business days and include tracking.
- Sold for research use only; not intended for human use.
Lab results
Independently tested, every lot
An independent laboratory supplies a certificate of analysis for every batch. Click on any report to see the original document.
Certificate of Analysis 99.69% purity (HPLC) View report → Endotoxin (USP 85) Not detected View report → Sterility (USP 71) No growth detected View report → Heavy metals (USP 233) Pass View report → Net peptide content: 20.61 mg per 20 mg vial. Identity confirmed by matching the HPLC retention time. All reports for this compound →
Our testing standard
No batch is released without approval from an independent lab. These are the tests we run and the results we disclose.
Identity: mass spectrometry
Mass spectrometry is used to confirm that each batch matches the expected molecular weight of retatrutide (approximately 4845 Da). Purity alone is not sufficient for us to release a batch.
Purity: HPLC
Reverse-phase HPLC is employed with a release threshold of 98% or higher. The precise percentage for the current batch is shown above and on the COA.
Endotoxin and sterility
Each batch undergoes LAL endotoxin testing, and the results are made public with the COA. Vials that are sterile-filled also receive bioburden testing.
Traceability
Every vial carries a lot number and an expiry date. The lot number corresponds to its COA, endotoxin report, and testing date. If you get a vial with a lot number that is not listed on this site, please contact us before using it.
Independent laboratories
Testing is carried out by third-party analytical labs that have no commercial relationship with our suppliers. The names of the labs are provided on each COA.
About the Retatrutide Peptide
Retatrutide (development code LY3437943) is a triple agonist: a single peptide designed to interact with three receptors simultaneously—GLP-1, GIP, and glucagon. This three-receptor action is what makes it notable for metabolic pathway research, since most earlier compounds in this class acted on one or two receptors, not all three.
We provide retatrutide peptide as a high-purity lyophilized powder intended for research use, and each batch is verified by an independent lab before it is shipped. You can order it online in five vial sizes to suit different experimental scales: 10, 15, 20, 30, and 60 mg.
Product specifications
| Form | Lyophilized powder in a sealed glass vial |
| Application | Triple-agonist metabolic pathway research |
| Appearance | Solid white powder |
| Chemical formula | C223H343F3N46O70 |
| CAS number | 2381089-83-2 |
| PubChem SID | 474492235 |
| Molecular weight | ~4845.4 g/mol |
| Synonyms | Retatrutide, LY3437943, GGG tri-agonist, Triple G peptide, "Reta" |
| Storage | Store sealed at or below 25°C, protected from heat, light, and moisture. |
Chemical structure
Buying retatrutide peptide online
No pharmacy anywhere in the world carries retatrutide, so the only way to obtain the peptide is by ordering it online from a research supplier. That makes vetting the vendor essential: before you buy retatrutide online from any source, make sure the lot has a public third-party COA, that endotoxin and sterility data are available, and that the company is willing to answer questions about its testing.
Buying from us works like any standard web store: choose the vial size you need above, add the peptide to your cart, and go to checkout—no account setup and no subscription needed. Packages are shipped from within the US within 1-2 business days and usually arrive within 5 days, with the printed COA included. buying retatrutide online and evaluating peptide vendors clarify the characteristics that distinguish a legitimate supplier from a grey-market one.
Frequently asked questions
Are the products quality-checked?
Absolutely. Every lot undergoes independent third-party laboratory testing for identity, purity, and composition, and we guarantee purity of at least 98%. Each COA includes the purity result, sequence verification, and test date. Endotoxin information can be requested separately.
How fast is delivery?
Orders are processed within 1-2 business days and arrive within 5 business days. Shipping is free for orders over $200. Tracking details are emailed to you.
What storage conditions are recommended?
The item is dispatched as a lyophilized powder and remains stable at room temperature while in transit. Once received, store unopened vials in a cool, dry place with the seal intact. For longer-term storage, freezing is advised.
What is the shelf life of an unopened vial?
An expiration date appears on each vial label and in the COA. In general, lyophilized peptides kept under proper conditions stay stable for 12-24 months, and sometimes longer at −20 °C.
Do you offer discounts for bulk orders?
Yes. Orders of 5 or more vials get a 5% discount, and orders of 10 or more get 10%, applied automatically at checkout. For larger quantities, contact us for a quote.
Is it legal to buy retatrutide peptide online?
In the US, research chemicals like retatrutide can be sold and bought online for laboratory research. Marketing or using an unapproved drug for human consumption is not allowed—so all our vials are clearly labeled 'research use only' and you must agree to the research-use waiver at checkout. Regulations differ by country; international buyers should check local laws before purchasing the peptide.
Why should you buy the retatrutide peptide here rather than from other online sellers?
Check three things: whether the seller supplies a third-party COA for the exact batch you will receive, whether endotoxin and sterility results are shared openly, and whether the lot number on your vial matches the documentation. For every batch of the retatrutide peptide, we provide all three before sale—see the lab reports page. If another online store meets these standards, they are also worth considering.