Retatrutide · LY3437943
Freeze-dried retatrutide peptide in a closed glass vial. Available for purchase online solely for laboratory research.
$125.00
per vial
Size
Quantity
Retatrutide (LY3437943) is a GGG triple agonist research peptide that simultaneously activates the GLP-1, GIP, and glucagon receptors. The peptide comes as a highly pure lyophilized powder in a closed glass vial, with each batch checked by an external lab prior to dispatch. When you order retatrutide online here, the COA for your specific batch is accessible to the public before purchase.
Lab results
Every batch is accompanied by a certificate of analysis from an independent laboratory. Click any report to view 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 reported: 20.61 mg per 20 mg vial. Identity validated by matching HPLC retention time. All reports for this compound →
No batch ships without an independent lab's approval. This is what undergoes testing and what we disclose.
Each batch is checked by MS to match the expected molecular weight of retatrutide (~4845 Da). We do not release a batch based solely on purity.
Reverse-phase HPLC with a release threshold of 98% or greater. The current batch's exact percentage is indicated above and on the COA.
Endotoxin testing using LAL is performed on each batch, and results are published with the COA. Sterile-filled vials also undergo bioburden testing.
Every vial is labeled with a lot number and an expiry date. The lot number links to its COA, endotoxin report, and testing date. If you receive a vial whose lot is not listed on this site, reach out to us before using it.
Testing is conducted by third-party analytical labs that have no commercial ties to our suppliers. Each COA lists the lab names.
Retatrutide (development code LY3437943) is a triple agonist: a single peptide engineered to act on three receptors at once—GLP-1, GIP, and glucagon. This combination is what makes it intriguing for metabolic pathway research, as most earlier compounds in this class targeted one or two receptors, not all three.
We offer retatrutide peptide as a high-purity lyophilized powder designed for research use, with each batch verified by an independent lab before shipping. You can order it online in five vial sizes for different experimental scales: 10, 15, 20, 30, and 60 mg.
| 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 | Keep sealed and store at or below 25°C, away from heat, light, and moisture. |
Retatrutide is not stocked by any pharmacy worldwide, so the only method to get the peptide is to order it online from a research supplier. Thus, vetting the vendor is crucial: before you buy retatrutide online from any source, ensure the lot has a public third-party COA, that endotoxin and sterility information is published, and that the company will address questions regarding its testing.
Purchasing here is just like any typical web store: pick the vial size you need above, place the peptide in your cart, and proceed to checkout—no account creation and no subscription required. Packages are shipped from within the US within 1-2 business days and typically arrive within 5 days, with the printed COA enclosed. buying retatrutide online and evaluating peptide vendors clarify the traits that set a legitimate supplier apart from a grey-market one.
Yes. Every batch is verified by independent third-party labs for identity, purity, and composition, with our purity guarantee set at 98% or higher. Each COA provides the purity analysis, sequence confirmation, and testing date. Endotoxin data is also available separately.
Orders are fulfilled in 1-2 business days and delivered within 5 business days. Free shipping is available on orders above $200. Tracking notifications are sent via email.
The product is shipped as a lyophilized powder, stable at room temperature during transit. After receipt, keep unopened vials sealed in a cool, dry location. For extended storage, freezing is recommended.
Each batch has an expiration date printed on the label and in the COA. Generally, lyophilized peptides stored correctly remain stable for 12-24 months, sometimes longer at −20 °C.
Yes. Orders of 5 or more vials receive a 5% discount, and 10 or more receive 10%, applied automatically at checkout. For larger quantities, contact us for a quote.
In the US, research chemicals such as retatrutide may be sold and purchased online for laboratory research purposes. Marketing or using an unapproved drug for human consumption is not permitted—that's why all our vials are clearly marked 'research use only' and you must accept the research-use waiver at checkout. Regulations vary by country; international customers should verify local laws before purchasing the peptide.
Compare three factors: if the seller provides a third-party COA for the exact batch you'll receive, if endotoxin and sterility results are openly shared, and if the lot number on your vial matches the documentation. For every batch of the retatrutide peptide, we make all three available prior to sale—see the lab reports page. If any other online store does the same, they are also worth checking.
