Sources we use
We use peer-reviewed trial papers (NEJM, The Lancet, JAMA Network Open), ClinicalTrials.gov, FDA statements and warning letters, court records, and Eli Lilly press releases and SEC filings. We do not use sellers of "research peptides", compounders, telehealth sites, forums or social media as sources of fact. Where a fact comes only from news reporting, we name the outlet.
How calculators are checked
Every calculator uses published, standard formulas. The code is covered by automated tests that check known answers (for example, a 10 mg vial mixed with 2 mL holds 5 mg/mL, so a 2 mg dose is 0.4 mL, or 40 units on a U-100 syringe). We show the formula next to each tool so anyone can verify the result by hand.
What we will not publish
- Dosing advice, "protocols", microdosing schedules or stacking guides.
- Links to, names of, reviews of, or discount codes from sellers of retatrutide or other unapproved peptides.
- Prices for retatrutide, because no legitimate price exists before approval.
- Claims we cannot support with a source.
Updates and corrections
Each page shows the date it was last updated. When Lilly reports a new trial, a paper is published, ClinicalTrials.gov changes a status, or the FDA acts, we update the affected pages and their dates. If you find an error, tell us through the contact page and we will review it and correct it.