COA-pep was built for researchers who need to know where a compound came from and what is in the vial. We do not compete on price. We put that money into manufacturing and batch testing instead, so you can buy peptides with documentation behind every lot. Our catalog spans metabolic, regenerative, cognitive and cosmetic research.

Each batch is tested by an ISO/IEC 17025 accredited independent lab for purity, identity, endotoxins, heavy metals and sterility. Every report is tied to a batch-specific certificate of analysis. Product pages list sequence, molecular weight, CAS number and vial size, and orders before 3 PM ET ship the same or next day. If you are still deciding where to buy peptides, our USA-made, COA-tested catalog is a good place to start.