Yes, every batch is tested by independent, accredited laboratories using HPLC for purity verification and Mass Spectrometry for identity confirmation. The results are published on each product page as Certificates of Analysis (CoA).

CoAs are available on each product page. Simply click the ‘Certificate of Analysis’ link to view or download the current batch’s test results. You can also request specific CoAs by emailing tcpiggybank@tcpiggybank.com with your order number.

Our research peptides are synthesized in USA-based facilities under strict internal quality control procedures. We maintain full supply chain transparency and do not source materials from overseas manufacturers.

All peptides are produced to 99%+ purity standards. Every batch is thoroughly tested by third-party laboratories using HPLC and Mass Spectrometry. Certificates of Analysis (CoA) are available for each product on its product page.

Lyophilized (powder) peptides should be stored at -20°C for long-term preservation, or at 2–8°C in a refrigerator for short-term use. Always keep them protected from light and avoid repeated freeze-thaw cycles.

Lyophilized peptides typically have a shelf life of 2+ years when stored properly at -20°C. Each product includes a lot-specific expiration date for reference.