Yes. COA-pep is a Shenzhen-based supplier of research peptides, and you can check our claims yourself. Our peptides are made in a cGMP facility in Shenzhen, China, and every batch is tested by an ISO/IEC 17025 accredited independent lab before we sell it.

The test panel covers purity by HPLC, identity by LC-MS, quantity, endotoxins, heavy metals and sterility. Purity typically comes in at 99% or higher, and our team can send a certificate before you order. Each vial carries a QR code with its lot number, and you can review reports on our certificates of analysis page. Every batch has its own report, so you can buy peptides online and see exactly what was tested.