What changed?
A sourced timeline of research records and material development changes tracked by BACToBasics for Retatrutide. Research-publication dates and clinical-development event dates are labeled separately so they are not mistaken for the same type of update.
Tracked items
4
Research sources
2
Development entries
2
Latest recorded date
May 21, 2026
Latest development activity
May 21, 2026 · Trial readout · Phase 3
Lilly reported positive topline results from TRIUMPH-1, providing the first pivotal Phase 3 obesity readout for retatrutide while the drug remained investigational.
Open source ↗Latest research record by publication date
Published 2026 · Human intervention · Industry Phase 3 report
Company-reported TRIUMPH-1 results provide late-stage human evidence for retatrutide and move the evidence base beyond early clinical development.
Open source ↗Tracked timeline
Development changes are dated to the underlying milestone. Research-source entries use the study or source publication year currently stored in the Research Library; that year is not presented as the date BACToBasics added the record.
Trial readout · Phase 3
Lilly reported positive topline results from TRIUMPH-1, providing the first pivotal Phase 3 obesity readout for retatrutide while the drug remained investigational.
Human intervention · Industry Phase 3 report
Company-reported TRIUMPH-1 results provide late-stage human evidence for retatrutide and move the evidence base beyond early clinical development.
Trial readout · Phase 2
The randomized Phase 2 obesity trial was published online in the New England Journal of Medicine, establishing direct mid-stage human efficacy and safety evidence for retatrutide.
Human intervention · Phase 2 randomized trial
This randomized Phase 2 trial established direct human efficacy and safety evidence for retatrutide as a triple GIP, GLP-1, and glucagon receptor agonist.
Following a compound creates a clean baseline from the updates currently known. When BACToBasics later records a new research source or material development change, the My Tools update badge can surface it as new for you.
BACToBasics provides educational research organization only. A development milestone does not predict future approval, and a research record does not establish that a compound is safe, effective, approved, or appropriate for use.