This page is a public attestation for the exact batch whose lot is linked to a QR code on your vial. Identity is confirmed by mass spectrometry; purity by reversed-phase HPLC (% area). A −80°C retention aliquot of this lot is held for 24 months and re-run on challenge. If the material you received does not match these values, email research@xfactorpeptidelab.com with your order and lot — discrepancies trigger replacement under our refund policy.