About RetaRate
Last updated: October 19, 2026
RetaRate.com was launched in 2026 to answer one question that comes up again and again in peptide research communities:where can you buy retatrutide in the United States from a seller that is transparent about what is in the vial?
Interest in retatrutide grew quickly after Eli Lilly's phase 2 results were published in The New England Journal of Medicine in 2023, and dozens of "research peptide" storefronts appeared almost overnight. Many look alike, few explain their testing, and their prices, shipping terms and refund policies differ widely. We built RetaRate to compare them side by side using criteria anyone can check.
What we do
- Rank vendors that sell retatrutide to US customers, using a published, weighted methodology.
- Review each vendor in depth, recording testing documentation, pricing, shipping, payments, policies and reputation, with the date we checked.
- Explain the science behind retatrutide and other GLP-1-based medicines in plain English, citing primary sources.
- Publish a weekly peptide news article with a focus on the US.
The team
Content is produced by the RetaRate Editorial Team. Research articles are written from peer-reviewed publications, clinical-trial registries and regulatory documents. We do not present our writers as physicians, and nothing on the site is medical advice.
How we are funded
RetaRate is free to read. We earn commissions from some vendors when readers click through and buy, including our top-ranked vendor. This is explained in full in our affiliate disclosure.
Get in touch
Corrections, vendor submissions and questions: contact@retarate.com or our contact page.