§ Research summary · Metabolic

Retatrutide 30 mg kit

Also known as · LY-3437943

Metabolic·1 min read·reviewed 2026-05-07

Retatrutide 30 mg lyophilised vial kit — the mid-dose research presentation. Includes bacteriostatic water, syringes, and swabs.

Chemistry quick-facts

CAS
2381089-83-2
Formula
C221H343N51O66
MW
4729.4 Da
Length
39 aa
Status
Investigational. Phase 3 trials under the TRIUMPH programme. Not approved anywhere.
Purity (HPLC)
≥ 99.2%

Mechanism of action

Simultaneous agonism at GLP-1, GIP, and glucagon receptors. The added glucagon-receptor agonism is proposed to drive energy-expenditure effects in addition to incretin-mediated insulin secretion.

Research context

Retatrutide (LY-3437943) is an investigational triple-agonist peptide being studied in Phase 3 trials. The 30 mg vial is the mid-dose presentation, widely used in extended research protocols and analytical-chemistry reference work.

Every lot is tested by Janoshik Analytical in Slovakia: HPLC for purity, ESI-MS for identity. COA is published on the product page before the lot lists for sale.

Published studies

A non-exhaustive list of peer-reviewed studies referenced when curating this entry. Click through to the primary source for the full text.

  1. Jastreboff AM, et al. (2023). Triple-Hormone-Receptor Agonist Retatrutide for Obesity — Phase 2 Trial. NEJM.
  2. Rosenstock J, et al. (2023). Retatrutide in people with type 2 diabetes — Phase 2. The Lancet.

Active clinical trials

  • NCT05929066Phase 3 · Ongoing

    TRIUMPH-1: Retatrutide in obesity

Reconstitution

Solvent
Bacteriostatic water for injection (0.9% benzyl alcohol) — included with kit
Typical volume
1 – 2 mL
  • · Inject diluent slowly down the side of the vial onto the cake.
  • · Swirl gently — do not shake.
  • · Solution should be clear and colourless. Discard if not.

Storage

Lyophilised
−20 °C, desiccated, protected from light. Stable at 15–25 °C for up to 30 days in transit.
Reconstituted
2–8 °C, original vial, consumed within 4 weeks.
Shelf life — sealed
24 months from date of manufacture when stored lyophilised at −20 °C.

FAQ

How does this differ from the 40 mg pen?+

Same active peptide. The vial kit is lyophilised and requires reconstitution (bac water and syringes included); the pen is pre-filled and shipped cold-chain. Vial kits have a longer shelf life and do not require cold-chain shipping.

Research-use disclaimer

This page summarises the research literature on Retatrutide 30 mg kit for in vitro laboratory investigation only. It is not medical advice, not a treatment recommendation, and not a substitute for a qualified physician. Material is sold for analytical chemistry and cell-culture research, not for human or veterinary administration.

View Retatrutide 30 mg kit in the catalogue →
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