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Metabolic & Weight Loss · Triple-receptor research

Retatrutide

Scientific Product Dossier

Retatrutide is a research peptide that activates three hormone receptors: GIP, GLP-1 and glucagon. Scientists study how these signals work together in appetite, glucose control and energy use. Human trials have measured substantial average weight changes with a specific clinical preparation. Those results describe the tested preparation and study conditions; they do not establish effects of NHD catalog material. Below, you can compare the research findings, available catalog variants and information needed for a research enquiry.

Research use only Lot documents on request
Retatrutide research product family with 9 catalog variants
AI-generated packaging mockup for catalog navigation. It is not a photograph of an actual supplied lot; container, label and presentation may vary.

Product family

Compound overview

Shared values below are consolidated from the current catalog record. They are not independent verification or lot results; request the applicable product specification and ask which lot records are available before ordering.

Product identity

Product type
Peptide research compound
Catalog family
Retatrutide
Research category
Metabolic & Weight Loss
Evidence status
Source-reviewed literature module available below
Intended use
Research, development and manufacturing use only

Literature reference parameters

Compound class
GIP/GLP-1/glucagon receptor triple agonistInvestigational compound
U.S. regulatory status
Not a component of an FDA-approved drugFDA update current through May 31, 2026
Key obesity trial
Phase 2 · NCT0488176048-week randomized controlled study
Research identifier
LY3437943Development identifier in the phase 2 publication; the reported molecule activates GIP, GLP-1 and glucagon receptors.
Phase 2 population and duration
338 adults · 48 weeks · NCT04881760The primary endpoint was at week 24; week-48 weight change was secondary.

Identity safeguard Reference identifiers above describe the literature compound record. Confirm the supplied form, formula, molecular weight, purity and storage conditions against the applicable product specification and any available lot records.

Mechanism of action

How Retatrutide is studied

A target-to-pathway view grounded in the linked research records.

Weight reduction: the most-studied research effect

In large placebo-controlled trials, retatrutide produced average weight loss over months of treatment. Researchers measure weight change directly rather than inferring it from receptor activity. The numbers reflect group averages from the studied clinical formulation and protocol; they are not a guarantee for any individual or for catalog research vials. Trial participants were monitored for side effects, including gastrointestinal symptoms and heart-rate changes.

Blood sugar: a parallel research focus

A phase 2 trial in adults with type 2 diabetes measured HbA1c, a marker of average blood sugar over the previous two to three months. Retatrutide lowered HbA1c compared with placebo across most studied groups. These findings apply to the clinical formulation and trial conditions. They do not establish that a research vial would produce the same effect, and they are not treatment guidance.

Three receptors in one molecule

GIP, GLP-1 and glucagon are hormone receptors involved in appetite, insulin release and energy use. Combining all three activities in a single peptide is the defining feature of retatrutide and the reason it is studied. Engaging more receptors does not automatically mean better or safer outcomes; both benefits and adverse effects must be measured in controlled trials.

Reported research findings

What published studies report about Retatrutide

Reported outcomes are paired with their experimental model and evidence boundary.

Human clinical trial

2023 weight trial: 338 adults, 48 weeks

The highest studied retatrutide group had a mean weight reduction of 24.2% at week 48, versus 2.1% with placebo. This was a secondary endpoint in a phase 2 trial.

Gastrointestinal events were common, and heart-rate increases were reported. These are monitored trial outcomes, not a guarantee for catalogue material.

Read the primary study
Human clinical trial

2026 phase 3 trial: longer follow-up

The published TRIUMPH-1 report randomized 2,339 adults with obesity without diabetes and followed treatment for 80 weeks. Mean weight reduction in the highest study group was 25.0%, versus 3.9% with placebo.

Use the published endpoint and analysis when reading these numbers. Earlier sponsor announcements used different reported estimates; separate trials are not a head-to-head comparison with tirzepatide.

Read the primary study
Human clinical trial

Blood-sugar trial: what HbA1c showed

In a phase 2 trial in type 2 diabetes, the highest retatrutide study group had a 2.02-percentage-point HbA1c reduction at week 24, versus 0.01 points with placebo.

Percentage points describe the change in the HbA1c value; they are not a percentage reduction in body weight or a treatment instruction.

Read the primary study
FDA record

Retatrutide remains unapproved in the United States

FDA states that retatrutide is not a component of an FDA-approved drug and has not been found safe and effective for any condition.

FDA also warns that “research purposes” wording does not convert an unapproved product into an approved medicine.

Read the primary study
Translation boundary: findings are limited to the evidence level stated on each card. Experimental protocol quantities are research details, not usage instructions.

Catalog options

Variant specifications

Pack-level catalog data; lot-level controls remain document-specific.

Catalog no.RT5
Pack size5 mg × 10 vials
Specification & documents for RT5

Product specification

Single-component peptide · 5 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT10
Pack size10 mg × 10 vials
Specification & documents for RT10

Product specification

Single-component peptide · 10 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT15
Pack size15 mg × 10 vials
Specification & documents for RT15

Product specification

Single-component peptide · 15 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT20
Pack size20 mg × 10 vials
Specification & documents for RT20

Product specification

Single-component peptide · 20 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT30
Pack size30 mg × 10 vials
Specification & documents for RT30

Product specification

Single-component peptide · 30 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT40
Pack size40 mg × 10 vials
Specification & documents for RT40

Product specification

Single-component peptide · 40 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT50
Pack size50 mg × 10 vials
Specification & documents for RT50

Product specification

Single-component peptide · 50 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT60
Pack size60 mg × 10 vials
Specification & documents for RT60

Product specification

Single-component peptide · 60 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Catalog no.RT100
Pack size100 mg × 10 vials
Specification & documents for RT100

Product specification

Single-component peptide · 100 mg/vial nominal · 10-vial pack · supplied form and release limits controlled by lot specification.

Lot documentation

Document availability and scope must be confirmed for this variant and lot in the written quotation. A catalog description is not a lot-specific test result.

Quality system

Quality documentation

A listed document is not proof of availability for this lot. Ask the team to confirm the current COA status and the scope of any other records before ordering.

Lot-specific Certificate of AnalysisAvailability and scope must be confirmed for the selected catalog variant and lot
COA availability unconfirmed Ask about availability
Product Specification SheetAvailability and scope must be confirmed for the selected catalog variant and lot
Confirm before ordering Request
Analytical Method SummaryAvailability and scope must be confirmed for the selected catalog variant and lot
Confirm before ordering Request

Analytical interpretation

Interpret the documents, not just the headline number.

Use the source-reviewed guide to separate chromatographic area purity, quantitative assay, LC-MS identity, composition and stability evidence before comparing variants or requesting a lot record.

Open the Quality & Documentation Hub

HPLC area ≠ assayA dominant peak does not establish target mass fraction.

Intact mass ≠ full sequenceIdentity strength depends on resolution and orthogonal evidence.

Counterions affect contentWater, salt form and solvents change the as-is composition.

Storage needs a data basisShipping practice is not the same as stability evidence.

Evidence map

Research context

Published studies and regulatory records, not customer testimonials or usage guidance.

Phase 2

Adults with obesity

Randomized, double-blind, placebo-controlled, dose-ranging clinical research over 48 weeks.

View primary record
Registry

NCT04881760 trial record

Primary registry record for the Phase 2 obesity study, including design, enrollment and outcome framework.

View primary record
Evidence boundary: each card states its evidence type. Human trials and regulatory records describe the studied or regulated intervention; preclinical records remain model-specific. None verifies the identity, quality, safety or efficacy of this catalog lot or provides usage instructions.

Literature basis

Curated references

Third-party publications selected for direct relevance.

  1. 01

    Triple-Hormone-Receptor Agonist Retatrutide for Obesity — A Phase 2 Trial

    Jastreboff AM, et al. N Engl J Med. 2023;389:514–526. PMID 37366315.

    Phase 2 RCT
  2. 02 Registry
  3. 03

    FDA concerns with unapproved GLP-1 drugs used for weight loss

    U.S. Food and Drug Administration. Content current through May 31, 2026.

    FDA record
  4. 04

    TRIUMPH-1 sponsor-reported topline results

    Eli Lilly and Company. May 21, 2026. Sponsor news release; not a full peer-reviewed report.

    Sponsor topline
  5. 05

    TRIUMPH-2 and TRIUMPH-3 sponsor-reported topline results

    Eli Lilly and Company. July 23, 2026. Sponsor news release; detailed publication pending.

    Sponsor topline

Research FAQ

Retatrutide questions

Concise answers for researchers comparing identity, evidence and catalog variants.

What effects are studied for Retatrutide?

Placebo-controlled trials measured body-weight change and HbA1c, a marker of average blood sugar. Participants receiving retatrutide lost substantially more weight on average than those receiving placebo, and HbA1c improved in a diabetes trial. These are group averages from the tested clinical formulation and protocol. They do not predict individual results or apply to NHD research vials, which have not been studied in humans.

How should the Retatrutide research findings be understood?

GIP, GLP-1 and glucagon are hormone receptors involved in appetite, insulin release and energy use. Combining all three activities in a single peptide is the defining feature of retatrutide and the reason it is studied. Engaging more receptors does not automatically mean better or safer outcomes; both benefits and adverse effects must be measured in controlled trials.

What effects are researchers studying?

The main areas covered here are weight reduction and blood-sugar control. The results come from clinical trials of a defined intervention. NHD catalogue material has not been tested in those trials.

Does a 24.2% result mean everyone loses that much?

No. It was the mean result of one study group at 48 weeks in the 2023 trial. Participants varied, and the trial also recorded adverse events.

Is retatrutide FDA approved?

No. It remains an investigational compound in clinical development.

Which quality documents can be requested?

Tell us which records your project requires. Availability and scope must be confirmed for the selected material. Published papers are not batch certificates, and this page does not confirm that a lot-specific COA is available.

How should Retatrutide be stored?

Request the storage conditions for the exact supplied form and selected variant. A temperature stated for another supplier or a clinical drug preparation is not a verified storage specification for NHD catalog material.

Does “three receptors” mean three peptides are mixed together?

No. Retatrutide is one designed molecule that can activate three receptor types. That is different from mixing three separate ingredients. Match the full compound name and requested form when comparing research quotations.

What should I include in a research quotation request?

Send the exact product name, selected catalog variant, required quantity, destination and documents needed for the project. Specify whether the amount refers to powder mass or measured peptide content. Availability, price, lead time and document scope require confirmation.

Does a published study replace a lot-specific analytical report?

No. A paper describes the material and methods used in that study. It does not establish the identity, purity or content of a different supplied lot. Ask which records actually apply to the requested material; do not assume a COA is available.

Knowledge center

Related insights

Owned educational content connected to this family.

Source-traceable evidence

Public research cases

Structured readings of published studies, with the model, result and translation boundary stated explicitly.

Knowledge tools

Continue with structured evidence

Move from this dossier into canonical evidence maps, verified status records, analytical interpretation and laboratory calculations.

Internal technical source review

Published-study results are tied to the linked records and kept separate from catalog-lot claims. Imported purity, storage and document-availability templates have been removed pending product- and lot-specific confirmation.

Editorial status: Source review complete · 2026-10-09 · Not independent medical review · Review policy

Technical procurement

Ready to request a quote?

Selected: RT5 · 5 mg × 10 vials