RESEARCH, WITH CONTEXT.Original sources. Clear limitations.Our approach
RERetatrutide ExplainedSCIENCE MADE READABLE
Back to the reading collection

RETATRUTIDE EXPLAINED / SOURCE INDEX

Retatrutide, from mechanism to measured outcomes.

The retatrutide story contains several kinds of evidence: discovery experiments, early human research and later clinical trials. This focused index follows the original papers cited in the explainer, rather than mixing them with unrelated peptide studies.

Keep the experimental model, population and time point attached to each result. A published phase 3 trial and a regulatory approval are different events. Official status information and trial-registry links remain in the relevant guide’s bibliography.

5 distinct original-paper links cited across 3 guides in this edition. Each link is counted once, even when several articles cite it.

Showing 5 of 5 original-paper links.

Retatrutide2023
Randomised trial

Triple-Hormone-Receptor Agonist Retatrutide for Obesity — A Phase 2 Trial (opens the original source in a new tab)

New England Journal of Medicine

Design
Phase 2, double-blind, randomised, placebo-controlled trial; 48 weeks. Primary endpoint at week 24.
Population / setting
Adults with obesity, or overweight plus at least one weight-related condition.
Sample size
n = 338

What was observed
The highest studied arm had mean weight change of −17.5% at the primary 24-week endpoint versus −1.6% with placebo. At the secondary 48-week endpoint, changes were −24.2% versus −2.1%. Gastrointestinal events and increases in heart rate were reported.

Keep in view
This phase 2 result estimates effects in the studied arms and population, not an approved indication or a long-term cardiovascular outcome. The frequently quoted 24.2% is a secondary 48-week result, not the primary endpoint. Funded by Eli Lilly.

Open the original paper (opens in a new tab)

WHY THIS SOURCE IS HERE

Retatrutide
Original publication

Jastreboff et al. (2026): TRIUMPH-1 phase 3 trial (opens the original source in a new tab)

pubmed.ncbi.nlm.nih.gov

Open the original paper (opens in a new tab)

WHY THIS SOURCE IS HERE

Retatrutide
Original publication

Bellido et al. (2026): TRIUMPH-2 phase 3 trial (opens the original source in a new tab)

pubmed.ncbi.nlm.nih.gov

Open the original paper (opens in a new tab)

WHY THIS SOURCE IS HERE

THE RESEARCH NETWORK

Two destinations.
One commitment to context.

Explore PepTup Europe and Echo Peptides, the research-material brands connected to this publication. Echo’s public study hub is one of our editorial sources; original papers are linked separately.

These are commercial relationships. A paper about a molecule does not validate a supplier’s product or establish suitability for human use.

Preparing your reading access…