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Research Peptide FAQs

Everything you need to know about our products and ordering process.

Retatrutide (LY3437943) is an investigational triple incretin receptor agonist that simultaneously targets GIP, GLP-1, and glucagon receptors. It is being studied for its potential role in metabolic research contexts. All information is for research and educational purposes only; our product is not intended for human use.
We accept Bitcoin, Zelle, and Cash App (availability of Zelle/Cash App may vary). After placing your order, the checkout step shows payment details for your chosen method. For Bitcoin, you'll receive our wallet address — send the exact BTC equivalent of your order total; orders are processed once payment is confirmed on-chain (typically 1–3 confirmations). Don't have Bitcoin yet? Cash App makes it simple — buy BTC instantly and send it directly from the app to our wallet address. For Zelle or Cash App, send the exact order total to the recipient/cashtag shown at checkout and include your order number or email in the memo so we can match your payment. All methods are for research-use purchases only; we're not able to process payments for any other purpose.
We ship all orders within 1–2 business days from our US warehouse. Domestic delivery typically takes 3–5 business days. US shipping is free; international orders ship at a flat $20. Tracking information is emailed once your order ships.
Yes. All of our products are tested by independent third-party laboratories and a Certificate of Analysis (CoA) is available for every batch. You can request the CoA for your specific lot by emailing us after placing your order. The CoA includes HPLC purity data and mass spectrometry confirmation of identity.
Our research peptides are supplied at ≥98% purity, verified by HPLC analysis and confirmed by mass spectrometry. Each batch is tested by an independent third-party laboratory, and a Certificate of Analysis (CoA) is available upon request. The CoA documents lot number, purity percentage, and molecular identity confirmation.
Yes — we ship internationally, including to the United Kingdom, for a flat $20 added to your order total (select your country at checkout and it's added automatically). US orders always ship free. All orders are fulfilled from our US warehouse; domestic delivery typically takes 3–5 business days after payment confirms, international a little longer.
Semaglutide is a single GLP-1 receptor agonist. Tirzepatide is a dual GLP-1 + GIP agonist. Retatrutide (LY3437943) is a triple agonist targeting GLP-1, GIP, and glucagon receptors simultaneously — making it the broadest incretin receptor agonist currently under research. All are research compounds; retatrutide has not been approved for any clinical use.
Retatrutide's CAS number is 2381272-89-3. Its INN designation is LY3437943. The approximate molecular weight is 4815.5 g/mol. It is a peptide consisting of 39 amino acids with a fatty acid chain for half-life extension.
Store lyophilized Retatrutide at -20°C. Reconstitute with sterile bacteriostatic water. Once reconstituted, store at 4°C and use within 2 weeks. Avoid repeated freeze-thaw cycles. For in-vitro research and laboratory use only.
Research Background

What Is Retatrutide (LY3437943)?

Retatrutide (INN: LY3437943, CAS: 2381272-89-3) is an investigational triple incretin receptor agonist developed by Eli Lilly. It is the first peptide in its class to simultaneously target three receptors: the GIP receptor (glucose-dependent insulinotropic polypeptide), the GLP-1 receptor (glucagon-like peptide-1), and the glucagon receptor.

This triple-receptor mechanism distinguishes Retatrutide from earlier-generation compounds. Semaglutide activates only GLP-1 receptors; tirzepatide activates both GLP-1 and GIP receptors. Retatrutide's additional glucagon receptor agonism adds a third dimension to its metabolic research profile, making it the subject of active Phase 3 clinical investigation.

Our Retatrutide is supplied as lyophilized powder in a sterile vial, tested at ≥98% purity by HPLC with mass spectrometry identity confirmation. A Certificate of Analysis (CoA) is available for every batch. For in-vitro research and laboratory use only. Not for human consumption.

Key identifiers: CAS 2381272-89-3 · LY3437943 · Triple GIP/GLP-1/glucagon agonist · MW ~4815.5 g/mol · 39 amino acid peptide · Fatty acid chain for extended half-life