Research Peptide · US Supplier
Buy Retatrutide in the USA
Retatrutide — a triple GLP-1 / GIP / glucagon receptor agonist — supplied for laboratory research. ≥99% HPLC purity, batch-matched third-party COA, cold-chain shipping from Manhattan.
About This Compound
Retatrutide is a synthetic triple-agonist peptide designed to engage the GLP-1, GIP, and glucagon receptors, developed by Eli Lilly and referenced in the peer-reviewed metabolic-research literature since ~2022. Sold here strictly as a research chemical for in-vitro receptor-binding, cellular-signalling, and preclinical-model investigation.
Because Retatrutide is a longer engineered peptide with a lipidated tail for prolonged in-vivo half-life in preclinical animal models, our synthesis workflow uses SPPS with orthogonal side-chain protection followed by on-resin lipidation. Purification is by preparative reverse-phase HPLC to ≥99% purity; identity is confirmed by ESI-MS. Endotoxin below 0.5 EU/mg by LAL.
Presented as a lyophilized white powder in septum-sealed vials for reconstitution with bacteriostatic water. Every batch ships with a matching third-party Verum Analytics Certificate of Analysis publicly verifiable in our /coa-library.
Retatrutide is not FDA-approved for any therapeutic indication and is not intended for human or veterinary use. BioInfinity supplies it exclusively for laboratory research in receptor pharmacology, incretin-signalling, and metabolic-model preclinical studies.
Quality Benchmarks
Every batch shipped from BioInfinity is verified against these specifications by an independent third-party lab before release.
- Purity
- ≥ 99% by reverse-phase HPLC
- Identity
- Confirmed by ESI-MS mass spectrometry
- Endotoxin
- < 0.5 EU/mg (LAL assay)
- Third-Party COA
- Verum Analytics (Switzerland) — batch-matched
- Origin
- Solid-phase peptide synthesis (SPPS), Fmoc chemistry
- Presentation
- Lyophilized white powder, septum-sealed vial
- Storage
- Refrigerate 2–8 °C; long-term −20 °C, protect from light
- Batch Traceability
- Every vial tied to a lot number & verification code
Research Applications in the Literature
Non-exhaustive list of subjects investigated in the published preclinical / in-vitro literature. Provided for research-context reference only — not a claim of efficacy.
- GLP-1 receptor binding & activation assays
- GIP receptor pharmacology in-vitro
- Glucagon receptor cross-reactivity studies
- cAMP / β-arrestin signalling pathway research
- Preclinical metabolic-model literature (rodent)
- Insulinotropic-response in-vitro assays
- Multi-receptor agonism / functional-selectivity research
Frequently Asked Questions
Where can I buy Retatrutide in the USA?▾
BioInfinity is a US-based research peptide supplier shipping Retatrutide same-day from our Manhattan facility. Every vial ships with a batch-matched third-party Certificate of Analysis (COA) and includes cold-chain packaging when the transit route requires it.
What purity is your Retatrutide?▾
Our Retatrutide is ≥ 99% pure by reverse-phase HPLC, identity-confirmed by mass spectrometry, and endotoxin-tested via LAL assay. The exact assay values for the batch you receive are published on your product page and are also included as a printed COA in the shipment.
Do you provide a Certificate of Analysis (COA) with Retatrutide?▾
Yes. Every shipment includes a batch-matched COA from an independent third-party laboratory (Verum Analytics, Switzerland). You can also verify the batch online in our public COA library using the verification code printed on the vial label — no login required.
How is Retatrutide shipped?▾
USPS Priority (2-3 business days) or UPS Ground (3-5 days). Cold-chain packaging with gel packs sized to the transit route. Discreet plain unbranded outer boxes — the label carries only the address and standard postal markings.
What payment methods can I use for Retatrutide?▾
Credit / debit card (Visa, Mastercard, Amex, Discover), Zelle, Venmo, Cash App, USDC stablecoin, and wire transfer for institutional orders. Zelle typically clears fastest and is the most common payment method our repeat customers use.
Is Retatrutide FDA-approved or intended for human use?▾
No. Retatrutide is not FDA-approved for any therapeutic indication. BioInfinity supplies Retatrutide strictly for in-vitro laboratory research. It is not intended for human, veterinary, or in-vivo use of any kind.
How should I store Retatrutide once it arrives?▾
The lyophilized (freeze-dried) powder is stable at 2–8 °C refrigeration for normal-use timeframes. For extended storage until the expiry date, store at −20 °C protected from light. Once reconstituted for bench work, refrigerate at 2–8 °C and use within 3–4 weeks per general peptide-handling literature.
Can I get a bulk / institutional discount on Retatrutide?▾
Yes. Professional accounts qualify for tiered volume discounts. Create a Professional account at /account, or e-mail [email protected] with your institution and PO details.
What is your return policy on Retatrutide?▾
Unopened, cold-chain-intact vials can be returned within 14 days of delivery for a refund minus return shipping. Opened vials are non-returnable due to the nature of the product. If a shipment arrives damaged or thawed, contact us within 48 hours for a free replacement.
How fast do orders for Retatrutide ship?▾
Orders placed by 3:00 PM ET Monday–Friday ship same-day from Manhattan. Weekend orders ship the following Monday. You'll receive a tracking number by email the moment the label is scanned by USPS or UPS.
Do you ship Retatrutide internationally?▾
We ship domestically within the 50 United States plus Puerto Rico and the US Virgin Islands. International shipments are evaluated case-by-case and require additional documentation — please contact [email protected] for a quote.
Where can I read your Retatrutide COA?▾
Every batch's COA is browsable from our public /coa-library page. You can also click the "View COA" button on the Retatrutide product page (/product/glp3-r) or on the vial label itself, which carries a QR code that resolves to the batch's verification page.
What sizes does Retatrutide come in?▾
5 mg, 10 mg, and 15 mg septum-sealed lyophilized vials. Institutional bulk sizes on request through [email protected].
Is Retatrutide the same as semaglutide or tirzepatide?▾
No — all three are GLP-1-family research peptides but they differ in receptor selectivity. Semaglutide is a GLP-1 monoagonist. Tirzepatide is a dual GLP-1/GIP agonist. Retatrutide is a triple GLP-1/GIP/glucagon agonist and is the most receptor-broad of the three.
Related Research Peptides
Frequently sourced together by research groups.
Ready to Order?
Same-day shipping from our Manhattan facility. Third-party Certificate of Analysis included with every shipment.
All products sold by BioInfinity are supplied strictly for in-vitro laboratory research use only. They are not FDA-approved for any therapeutic indication and are not intended for human or veterinary use.