Tirzepatide is a dual GIP/GLP-1 receptor agonist (MW ~4,813.5 Da), the molecule behind Mounjaro and Zepbound. Like semaglutide, its high demand makes counterfeiting and mislabeling the main sourcing risk.
Counterfeit Risk Is the Main Issue
Require a third-party COA (HPLC and mass spectrometry) confirming ≥98% purity and the ~4,813.5 Da molecular weight per batch. Tirzepatide's dual-agonist structure is more complex than semaglutide's, making synthesis verification especially important.
What to Look for
US-based manufacturing, per-batch COAs, sealed lyophilized vials, and transparent sourcing. Verify the vendor is not representing research material as Mounjaro/Zepbound.
Typical Price Range
Research-grade tirzepatide typically costs about $40–$80 per vial depending on strength.
Red Flags to Avoid
Missing or generic COAs, MW mismatch, prices far below market, pharmaceutical-equivalence claims, and human-use claims.
Top Recommended Source
Purgo Labs is our top-rated source based on third-party COA verification, research-grade purity, and transparent manufacturing. View at Purgo Labs.