Test it yourself. If it fails, you get a full refund.
Independent test fails? Full refund.
Independent test fails? Full refund.
10 vials per kit, from 1 kit per product and strength. We reply to every quote request within 24 hours. How quotes work →
10 vials per kit · from 1 kit · reply within 24 hours Quotes →
10 vials per kit · from 1 kit Quotes →
Two-peptide blend of retatrutide and tirzepatide in a 1:2 mass ratio
Research topic: Body & metabolism · group: GLP-1 class and amylin analogues
This vial holds 20 mg retatrutide and 40 mg tirzepatide, a 1:2 mass ratio of two related peptides. Both are lipidated and 39 residues long; tirzepatide is an agonist of the GIP and GLP-1 receptors, and retatrutide acts on the glucagon receptor as well. Each has its own page on pepoderma with its own fact table and studies. As a mixture the blend has no formula, mass or CAS of its own, and the COA of each lot reports the identity and assay of both components. It is listed in the GLP-1 and amylin group of our body-composition and metabolic page. The two studies in our product data concern retatrutide alone: a phase 2 trial in adults with obesity and the design paper of its phase 3 programme.
The COA of every lot of Retatrutide + Tirzepatide reports:
Ask for the COA of the batch you are quoted; the batch number on it is the batch we ship.
Independent test fails? Full refund. How the refund works
| Field | Value | Source |
|---|---|---|
| Chemical name | Retatrutide + Tirzepatide | Our product table |
| Other names | Retatrutide 20mg+Tirzepatide 40mg · LY3437943 plus LY3298176 | Our product table |
| CAS number | Not in our product tableNo single CAS: a blend of two peptides. Each component's CAS is on its own page. | Our product table |
| Strengths (per vial) | 60 mg | Our product table |
| Kit and minimum order | 10 vials per kit · from 1 kit per strength | Our product table |
| Form | Lyophilized powder | Our product table |
| Catalogue codes | 60 mg: RETA60 | Our product table |
| Purity specification | ≥ 99.0% (sum of declared peptides) (HPLC)Specification; the measured value is on the COA of the lot. | Our product table |
| Appearance | White to off-white lyophilized powder | Our product table |
| Storage | Store at 2–8 °C, protected from light and moisture | Our product table |
| Batch COA | Component identity · HPLC assay · endotoxin · fill volume — every lot | Our batch COA |
Product-table values checked 2026-10-09. The measured values of a lot are on its COA.
| First author / trial | Year | Journal | What was studied | Record |
|---|---|---|---|---|
| Jastreboff AM | 2023 | N Engl J Med | Phase 2 trial in adults with obesity | PubMed 37366315 |
| Giblin K | 2026 | Diabetes Obes Metab | Rationale and design of the phase 3 TRIUMPH trials of retatrutide | PubMed 41090431 |
Studies recorded in our product data (checked 2026-10-09). They show what has been researched with this molecule — the materials and models of each study — and are not a statement about the vials we supply.
What to put in your quote request
With these facts the first reply can carry the unit price per kit, shipping and lead time.
By testing the two peptides separately. The lot COA gives an identity result and an assay for retatrutide and for tirzepatide, so the content of each, and the ratio between them, can be read from it; a single total figure could not show that.
Not in our product data. The trial and the design paper cited concern retatrutide alone, and none of the registered studies that name both combines them; the phase 3 one compares them in separate arms.
One kit is 10 vials of the same product at the same strength. Each vial holds the stated amount, for example 10 mg of lyophilized peptide; the few solutions are stated per vial in mg or ml. 1 kit per product and strength. One order can combine several products and strengths, each from 1 kit.
The identity of each declared component, the HPLC assay of each component, endotoxin and fill volume, on the COA of every lot. The COA carries the lot number of the vials you receive. Yes. Ask for the COA of the batch you are quoted; the batch number on that COA is the batch we ship.
In writing, per request. Prices are tiered by the number of kits of each peptide and strength; the quotation gives the unit price per kit, the shipping cost and the lead time. We reply within 24 hours.
Related peptides
Triple GIP, GLP-1 and glucagon receptor agonist peptide (LY3437943)
Nasal spray availableCapsules available
Dual GIP and GLP-1 receptor agonist peptide of 39 residues
Nasal spray available
Retatrutide and cagrilintide blended in one lyophilized vial
