The Retatrutide File

Not approvedInvestigational

Retatrutide guides

Retatrutide is not approved anywhere, so every guide here reports on trials, filings and the law, with a date on each claim. 11 guides, last checked Nov 12, 2026.

What is it?

The molecule, who makes it and how it acts on the body.

  1. Basics What is retatrutide? The peptide, the trials and where it stands The full first answer: the molecule, the maker, the results and the status. Last checked Nov 12, 2026
  2. Basics Retatrutide mechanism of action: how retatrutide works on three receptors The three receptors in plain words, why glucagon is the new part, the half-life and what nobody knows yet. Last checked Nov 12, 2026

Does it work?

Trial results, with the placebo or comparator beside each number.

  1. Evidence Retatrutide weight loss: the results from every trial so far Trial by trial: how much weight people lost, how fast, and who lost less. Last checked Nov 12, 2026
  2. Evidence Retatrutide benefits: what the trials show beyond weight loss Blood sugar, liver fat, knee pain, sleep apnea and more, each graded by evidence. Last checked Nov 12, 2026
  3. Comparison Retatrutide vs tirzepatide: what the trials show, and what they can't Three receptors against two, Zepbound and Mounjaro side by side, and the head-to-head trial still running. Last checked Nov 12, 2026
  4. Comparison Retatrutide vs semaglutide: Ozempic, Wegovy and the first head-to-head result One receptor against three, the head-to-head trial against Ozempic, Wegovy's pill and higher dose, and a three-way table. Last checked Nov 12, 2026

Is it safe?

Side effects by trial and dose, and what the trials tested.

  1. Safety Retatrutide side effects: what the trials found, dose by dose Nausea, skin sensitivity, heart rate and dropouts, trial by trial against placebo. Last checked Nov 12, 2026
  2. Safety Retatrutide dosage: the doses trials tested, and why none is approved What each trial tested, how doses were stepped up, and why no real dosage exists yet. Last checked Nov 12, 2026

Can I get it?

Approval timeline, cost and the only legal ways in today.

  1. Access Retatrutide FDA approval: status, filing plan and timeline Not filed yet. Lilly's Q1 2027 plan, FDA review clocks, the drug-or-biologic case and recruiting trials. Last checked Nov 12, 2026
  2. Access Retatrutide cost: no price yet, and what the legal routes cost No price exists. What trials and expanded access cost, today's prices for approved drugs, and insurance rules. Last checked Nov 12, 2026
  3. Access Retatrutide for sale: where to buy retatrutide, and what's legal No one can legally sell it. What the listings are, what tests found and the two legal routes. Last checked Nov 12, 2026