Why is retatrutide called illegal?
Illegal is internet shorthand. This site's national fields list retatrutide as investigational: not approved in the US, not licensed in the UK, not registered in Australia, and not approved in Canada. Investigational means it is still being tested and is not a legal prescription medicine in those four countries. It is not a criminal label for owning it, and it is not a state law this dataset has filled in. Selling an unapproved product as a drug for people is a different legal question from the investigational field. A research-chemical vial is not a finished medicine under review. TRIUMPH-1 included 2,339 people. As of this site's last review, the company was expected to ask for approval later in 2026. This FAQ does not invent a ban and does not invent a state law. National status: /legal/retatrutide/us.
Legal status by country, one page per compound
Studies in people from the compound pages this answer belongs to
- Retatrutide
- Triple-Hormone-Receptor Agonist Retatrutide for Obesity: A Phase 2 Trial 2023 PMID 37366315
- Triple hormone receptor agonist retatrutide for metabolic dysfunction-associated steatotic liver disease: a randomized phase 2a trial 2024 PMID 38858523
- A Master Protocol to Investigate the Efficacy and Safety of LY3437943 Once Weekly in Participants Without Type 2 Diabetes Who Have Obesity or Overweight (TRIUMPH-1) 2026 NCT05929066
Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.
Part of glp-1 and metabolic peptides. Semaglutide, tirzepatide, retatrutide, and the rest of the incretin and glucagon receptor family.