What is the purity of your Retatrutide, and can I see the test results?

Our current lot measures 5 mg at 99.83%, 10 mg at 99.95%, 30 mg at 99.86% purity by HPLC, tested by Freedom Diagnostics. The full certificate — including the raw chromatogram, net content and the lot number — is published on this page as a free download. No request or email needed.

Is Retatrutide the same as LY3437943?

Yes. Retatrutide is also referred to as LY3437943 and GLP-1/GIP/glucagon triple agonist. They describe the same compound — the naming differs between suppliers, development literature and chemical nomenclature.

How is Retatrutide reconstituted?

Retatrutide ships lyophilized — a freeze-dried solid — and is reconstituted with bacteriostatic water, which is sold separately. Add the water slowly down the inside wall of the vial rather than directly onto the powder, then swirl gently; do not shake. The final concentration depends on how much water you add, and our reconstitution calculator works out the volume for a target concentration.

How should Retatrutide be stored?

Lyophilized vials are stored at −20°C (−4°F), protected from light, and are stable at ambient temperature for the length of a normal shipping transit. Once reconstituted, keep refrigerated and protected from light. See our storage and stability guide for detail on how long reconstituted material holds.

What sizes of Retatrutide do you sell?

Retatrutide is available in 5mg, 10mg, 20mg and 30mg. Each size is priced separately and can be selected on this page; bulk pricing applies from two units.

How fast do you ship Retatrutide, and do you ship internationally?

Orders leave Miami within 1–2 business days of payment clearing. US delivery is typically 2–5 business days and shipping is free over $150. We ship worldwide — Canada, Europe including the UK, and the rest of the world at flat regional rates. Everything travels in insulated packaging with a cold pack, in a plain outer box with no branding.

Retatrutide for Sale – COA Published

Description

Retatrutide (LY3437943) is a triple GIP / GLP-1 / glucagon receptor agonist. This multi-receptor “triple-G” agonist is among the most-studied newer compounds in metabolic and weight-regulation research.

What researchers study

GIP / GLP-1 / glucagon receptor signaling
Metabolic and weight-regulation models
Energy-expenditure research

Handling & storage

Supplied as a lyophilized powder for reconstitution with bacteriostatic water (not included). Store at −20 °C (−4 °F), protected from light. Every lot is independently tested against a 99%+ purity release target, and the batch Certificate of Analysis is published in full on this page.

Research Use Only (RUO). Not for human or animal consumption, nor for therapeutic, diagnostic, or cosmetic use; to be handled only by qualified professionals in a controlled research setting.

Identity and specification

Retatrutide is also referred to as LY3437943 and GLP-1/GIP/glucagon triple agonist. It has the molecular formula C221H342N46O68 and a molecular weight of 4731.3 g/mol (CAS 2381089-83-2). That weight is corroborated by the mass-confirmation peak on this product’s own certificate rather than quoted from a reference alone.

How this lot was tested

The Retatrutide currently in stock measured 99.83% for the 5 mg (lot 261807), 99.95% for the 10 mg (lot 261807) and 99.86% for the 30 mg (lot 261807), tested by Freedom Diagnostics. The full certificate is published on this site as a free download — including the raw chromatogram and mass spectrum, so the figure can be read off the underlying data rather than taken on trust.

We use two independent laboratories, and each certificate says which produced it. Vanguard Laboratory is ISO 17025:2017 accredited (A2LA certificate #6377.01.01) and reports chromatographic purity and net quantity with a stated measurement uncertainty. Freedom Diagnostics reports HPLC-UV purity together with LC-MS identity confirmation, which is what verifies the vial contains the compound on the label rather than merely a pure something. Two laboratories, two methods, both published — see how we test.

Commonly studied alongside

In the literature Retatrutide is most often examined together with Tirzepatide, Cagrilintide and Bacteriostatic Water. Reconstitution is the same for all of them — see the reconstitution guide and the calculator, and the storage guide for how long reconstituted material holds. Current pricing for every compound and size is on the price list.

Why researchers order Retatrutide from Miami Peptide Lab

Independently tested every lot — the batch Certificate of Analysis is published in full, free to read
Ships from Miami / the US in 24–48 business hours with tracking, in discreet cold-chain packaging
Buy-more-save-more pricing — automatic bundle discounts on multiple vials
Reship-or-refund guarantee if your order is lost, seized, or arrives damaged

Molecular formula	C221H342N46O68
Molecular weight	4731.3 g/mol
CAS number	2381089-83-2
Purity	≥ 99% release target, by HPLC / MS
Form	Lyophilized powder
Grade	Research Use Only (RUO)
Storage	Store at −20°C (−4°F), protected from light
Reconstitution	Bacteriostatic water (not included)

Molecular weight is corroborated by the mass-confirmation peak on this product's Certificate of Analysis.

Figures reflect our standard release criteria. The batch-specific Certificate of Analysis for this lot is published in full.

Retatrutide