COA-pep is based in Shenzhen, China. Our peptides are manufactured in a cGMP facility in Shenzhen, China, and every batch goes through third-party lab testing at an ISO/IEC 17025 accredited laboratory in the United States. Keeping manufacturing, testing and fulfillment inside the country gives each batch a clear chain of custody, with fewer handoffs and no overseas customs holds.

If you are deciding where to buy peptides, location matters for speed too. Product is kept in medical-grade storage at the lab and our fulfillment facility, and tracking arrives by email once your order ships. Orders placed before 3 PM ET ship the same or next day by 2-day express, so you can browse our USA-made, COA-tested peptides for sale knowing they will arrive quickly.