Excalibur Peptides is a US-based research peptide supplier shipping HPLC and mass-spectrometry verified compounds from a domestic fulfillment facility. Every batch ships with an independent third-party Certificate of Analysis at ≥99% HPLC purity. Same-day processing on orders placed before 2 PM EST, 2–4 business day domestic delivery. For in-vitro laboratory research use only. Not for human consumption.