Retatrutide Peptide Vials
Synthetic triple incretin receptor agonist peptide · 5mg–100mg · boxes of 10 vials
Free delivery worldwide on orders over $1,000 (about £749)
Strength 9 options · price per box
Latest third-party test: 99.57%Purity (HPLC) · 5 mg · tested 30 Jul 2026
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- No minimumBoxes of 10 vials
- Tracked shippingDispatched in 1–2 working days
- Batch COAFree on request
- Photographed firstBefore it ships
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Often ordered together
One box of each. Change strengths or quantities in the cart.
Also ordered with Retatrutide
About Retatrutide
What is Retatrutide?
Overview
What is Retatrutide?
Retatrutide (development code LY3437943) is a synthetic single-molecule agonist at three receptors: GIP, GLP-1 and glucagon. The peptide backbone carries a C20 diacid fatty-acid conjugate that extends its plasma half-life through albumin binding. Supplied as a lyophilised powder, boxed in tens, for laboratory research use only. Each retatrutide vial holds a single strength, from 5 mg to 100 mg. You will also see it shortened to reta, or written as reta peptide — both refer to this same compound, and the retatrutide peptide listed on this page is what those names point to.
Retatrutide at a glance
| Compound | Retatrutide |
|---|---|
| Also known as | LY3437943, Reta, reta peptide, retatrutide peptide, triple agonist peptide, GGG tri-agonist |
| Classification | Synthetic triple incretin receptor agonist peptide |
| CAS number | 2381089-83-2 |
| Molecular weight | ~4731 g/mol |
| Sequence | 39-residue backbone with a C20 diacid fatty-acid conjugate |
| Purity | 99%+ by HPLC |
| Physical form | Lyophilised powder |
| Available strengths | 5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, 100 mg |
| Box quantity | 10 vials |
| Price from | $8.16 per vial ($81.57 per box) |
| Research status | Investigational. In late-stage clinical trials with Eli Lilly. Not approved for any use in any country. |
| Documentation | Batch-specific third-party COA |
These are catalogue target specifications, not batch results. The 99%+ purity figure is the specification we buy to. The authoritative figures for any particular box are the ones printed on that box’s Certificate of Analysis, which is lot-specific. What research grade actually means explains the difference. Terms such as HPLC purity and net peptide content are explained in the peptide glossary.
We make no “third-party verified” claim for a batch unless the matching report is supplied with it. Ask for the current COA for the lot in stock before you order — we will send it.
Prices for every strength
Pricing
Retatrutide price per vial: 5mg, 10mg, 15mg to 100mg
Retatrutide starts at $8.16 per vial (£6.11), sold in boxes of 10 at $81.57. One box is the smallest order and there is no trade account or minimum spend. Larger volumes are negotiable.
| Strength | Per vial | Box of 10 |
|---|---|---|
| 5 mg | $8.16 £6.11 | $81.57 £61.11 |
| 10 mg | $9.83 £7.36 | $98.28 £73.63 |
| 15 mg | $11.87 £8.89 | $118.71 £88.94 |
| 20 mg | $12.99 £9.73 | $129.85 £97.28 |
| 30 mg | $16.14 £12.09 | $161.42 £120.94 |
| 40 mg | $18.93 £14.18 | $189.28 £141.81 |
| 50 mg | $20.67 £15.49 | $206.71 £154.87 |
| 60 mg | $25.43 £19.05 | $254.28 £190.51 |
| 100 mg | $32.50 £24.35 | $325.00 £243.49 |
What to check before ordering, and what UK delivery involves: our retatrutide UK guide (legal status, prices, supplier checks).
Buying from the US: our retatrutide US guide (FDA status, dollar prices, US shipping).
Storage & reconstitution
Handling
How should Retatrutide be stored and reconstituted?
Sealed vials tolerate ambient temperature in transit and keep at −20 °C beyond that. Reconstitute slowly down the vial wall, swirl rather than shake, then refrigerate at 2–8 °C and aliquot before freezing.
Why each of those matters, and what a freeze–thaw cycle actually costs: peptide handling and storage reference. How long a mixed vial keeps: reconstituted peptide shelf life.
What it is researched for
Research Context
What is Retatrutide researched for?
Below is a plain-English summary of what published research has investigated, and what it has found. These are descriptions of research activity and published results. They are not claims about what Retatrutide does, and nothing here is a statement that it is safe or effective for any purpose.
Three receptors at once
Retatrutide activates the GIP, GLP-1 and glucagon receptors from a single molecule. The reasoning is that GLP-1 reduces appetite, GIP appears to improve how that is tolerated, and glucagon raises energy expenditure, so engaging all three may achieve more than any one alone. 1
Metabolic and body-weight research
Published Phase 2 trial results reported average body-weight reductions larger than those seen with single or dual agonists over comparable periods. Those are supervised clinical trial outcomes in patients, not statements about research-grade material. 1
Benchmarking against other incretins
As the most complete incretin agonist in development, retatrutide is routinely used as a comparator in receptor-binding and potency assays alongside tirzepatide and semaglutide.
References
- 1Triple-Hormone-Receptor Agonist Retatrutide for Obesity - A Phase 2 Trial. N Engl J Med (2023). PMID 37366315
Links open the record on PubMed or PubMed Central. These are citations to published research, not claims about this product.
Compare Retatrutide
Laboratory uses
Applications
Where Retatrutide is used in the laboratory
- Incretin receptor pharmacology and multi-receptor agonist binding studies
- Comparative in vitro receptor selectivity and potency profiling
- Peptide conjugate stability and formulation research
- Analytical characterisation of long-acting fatty-acylated peptides
Batch COA
Verification
Does Retatrutide come with a COA?
Yes — every box. Each batch of Retatrutide is analysed by an independent third-party laboratory, and the certificate is tied to the batch number on the vial label.
Example COA. You receive the certificate matching your own batch.
Questions & answers
Questions
Retatrutide questions, answered
Is retatrutide a peptide?
Yes. Retatrutide is a synthetic peptide built on a 39-residue backbone, carrying a C20 diacid fatty-acid conjugate that extends its half-life through albumin binding. The conjugate is a modification to a peptide chain, not a departure from being one.
What is reta peptide?
The same compound. Reta is the shorthand the market uses for retatrutide, and reta peptide is that shorthand written out — both point to the triple agonist described on this page, sold here as research material only.
What does triple agonist mean?
It means a single molecule binds and activates three distinct receptors, here the GIP, GLP-1 and glucagon receptors. This contrasts with single agonists such as semaglutide (GLP-1 only) or dual agonists such as tirzepatide (GIP and GLP-1).
How much does Retatrutide cost?
Retatrutide starts at $8.16 per vial, sold in boxes of 10 vials at $81.57 per box (about £61.11). 9 strengths available: 5 mg, 10 mg, 15 mg, 20 mg, 30 mg, 40 mg, 50 mg, 60 mg, 100 mg. There is no minimum order.
Can I buy Retatrutide 10mg vials in the UK?
Yes. Retatrutide 10mg comes in boxes of 10 vials at $98.28 per box ($9.83 per vial, about £73.63 per box), sent tracked to UK addresses. There is no minimum order.
Do you ship Retatrutide to the US?
Yes, to all 50 states. Retatrutide ships FedEx tracked from our UK stock or direct from our verified manufacturer, arriving 5 to 8 working days after dispatch, and is billed in US dollars from $8.16 per vial. We hold no US stock. If US customs seize an order, we reship it once at no cost. Our retatrutide US guide covers FDA status and US shipping in full.
How is Retatrutide shipped to the UK and USA?
Tracked to the UK, USA, EU and worldwide, in plain packaging, dispatched within 1–2 working days. Country-by-country estimates are on the shipping page.
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