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Status check · 2026-09-17

Retatrutide,
this month.

Where retatrutide actually stands this month: phase 3 progress, why the strongest weight loss drug ever tested still cannot be bought, and what the gray market charges for vials nobody regulates.

Published 2026-09-17 · Reviewed for medical accuracy

Where the trials stand

The phase 3 TRIUMPH program keeps running with no submission filed. The phase 2 number that started the frenzy — 24.2 percent mean weight loss at 48 weeks — remains the strongest result ever reported for a weight loss drug, and it is exactly why search demand for this molecule now rivals approved medicines.

What people pay anyway

Gray vendors sell retatrutide vials openly at prices that mirror lawful compounded tirzepatide — while carrying no pharmacy, no physician and no quality control. That price similarity is the tell: buyers pay prescription-grade money for research-chemical risk. Our position has not moved: there is no legal way to buy retatrutide, and the tracker below updates the week that changes.

What to watch next

Two things move this story: TRIUMPH readouts and any FDA action against retatrutide sellers, which the agency has signaled on GLP-1 copies broadly. Both land in the approval tracker and this blog when they happen.

Follow the live approval tracker