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Research Peptide FAQs

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

Retatrutide (LY3437943) is an investigational peptide that acts at three receptors from one molecule — GIP, GLP-1 and glucagon. It is the broadest of the three compounds we stock, and the reason the catalogue is arranged the way it is: single receptor, dual receptor, triple receptor. Everything stated here is for research and educational purposes; the material we supply is not intended for human use.
We accept PayPal or Bitcoin. PayPal is the shortest route — select it at checkout and pay as you normally would. For Bitcoin, the wallet address is shown at checkout; send the exact BTC equivalent of the order total, and the order is released once the payment confirms on-chain, typically after one to three confirmations. If you have not used Bitcoin before, Cash App will buy and send it in a few minutes, and a short guide is linked from the checkout. Payment is accepted for research-use purchases only.
Dispatch runs seven days a week. An order confirmed before 2 PM ET leaves the same day; anything later goes out the following day. Domestic delivery usually takes three to five days. Shipping within the US is free; international orders are charged a flat $20.
Yes. Orders of three or more vials include one 5 ml vial of bacteriostatic water, complimentary; it is added to your cart automatically. It is also available separately for $10.
Yes. Every compound is tested by an independent third-party laboratory, and the Certificate of Analysis for the lot in stock is available on request — it records the tested purity, the method used and the date of the test. The same figures are printed on each product page, so you can read them before you ask for the certificate.
≥98% is the floor, and the figure actually measured for the current lot is shown on the product page alongside the method used to measure it. Purity is confirmed by HPLC at an independent third-party laboratory rather than asserted in-house.
Yes. International orders are charged a flat $20, added automatically once a country is selected at checkout. The recipient is responsible for compliance with the import rules of their own jurisdiction.
They differ in how many receptors each one engages. Semaglutide is a single GLP-1 receptor agonist. Tirzepatide is a dual GLP-1 and GIP agonist. Retatrutide (LY3437943) is a triple agonist, adding the glucagon receptor to those two. That progression is the reason all three are carried together: read side by side, they let a single model be examined across one, two and three receptors. All three are research compounds, and retatrutide has not been approved for any clinical use.
CAS 2381089-83-2, development designation LY3437943, approximate molecular weight 4731.3 g/mol. It is a 39-amino-acid peptide carrying a fatty-acid chain that extends its half-life.
Hold the lyophilized powder at -20°C. Reconstitute with sterile bacteriostatic water. Once in solution, keep it at 4°C and use it within two weeks, avoiding repeated freeze-thaw cycles. For in-vitro laboratory research only.
All sales are final. We do not accept returns, refunds, or exchanges. Because these are research materials, they cannot be restocked or resold once they leave our facility.

If your order arrives damaged, incorrect, or is lost in transit, contact us within 7 days of delivery (or of the expected delivery date, for a lost package) at orders@whitegloveaminos.com and we will make it right with a replacement or store credit. This is a fulfilment guarantee for our own errors, not a change-of-mind return window.

All products are for research use only and are not intended for human or veterinary consumption.
Research Background

What Is Retatrutide (LY3437943)?

Retatrutide (INN: LY3437943, CAS: 2381089-83-2) 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 2381089-83-2 · LY3437943 · Triple GIP/GLP-1/glucagon agonist · MW ~4731.3 g/mol · 39 amino acid peptide · Fatty acid chain for extended half-life
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