Save ~96% vs Zepbound LillyDirect (single-dose vials)
Research-grade Tirzepatide is for laboratory and research use only, not approved for human consumption. Always consult a licensed physician before working with any compound. FDA-approved 2022 (Mounjaro) and 2023 (Zepbound). Eli Lilly's direct-to-consumer vial program brought cash-pay floor to $349 for 2.5mg starter doses.
See all Tirzepatide vendors →Live vendor comparison
Cheapest Tirzepatide — 2026
The cheapest Tirzepatide right now is $12.75 at Alpha Peptides (per 10mg). We compare 29 vendors with normalized $/10mg pricing so you're comparing apples to apples. Confirm the final price on the vendor site.
Tirzepatide pricing across our tracked vendors ranges $12.75 (cheapest) to $84.99 (most expensive) — a 567% spread for what should be the same compound. Median is ~$43.00. That's a huge spread, which usually means the cheapest vendor is either passing on bulk-buying advantage or cutting corners on QC. Always cross-check the cheapest vendor's COA before ordering. Cheapest vendor changes ~weekly based on restocks and discount cycling.
Why this page exists
Peptide prices vary wildly between vendors — sometimes by 3x or more for the exact same compound at the same purity. Vendors use different quantity sizes to obscure comparisons. PeptidePrices normalizes every mg-denominated listing to a 10mg equivalent so you can compare unlike vial sizes on the same basis.
How we rank: Only in-stock listings are shown. Prices are deduplicated per vendor (cheapest variant only). Non-normalized listings (missing quantity data) are excluded. See our full methodology.
Before you buy