Every compound in the Performance Peptides Canada catalog undergoes independent third-party analytical testing before it enters our inventory. The Certificates of Analysis below are batch-specific — meaning each document corresponds to the exact production lot currently available, not a generic or historical reference sample. Each COA includes HPLC chromatographic purity data confirming a minimum of 99% purity and Mass Spectrometry identity verification confirming the molecular weight matches the theoretical specification for that sequence. For guidance on interpreting these documents, refer to our complete guide on how to read a peptide COA.