About Countrywide Peptides
Countrywide Peptides is proud to be a dedicated supplier of lyophilized peptides for pre-clinical applications. Investigators access compounds synthesized in accordance with Good Manufacturing Practice (GMP) guidelines, ensuring peptide-to-peptide consistency. Third-party laboratories perform High-Performance Liquid Chromatography (HPLC) and Mass Spectrometry (MS) on every lot to confirm identity and purity.
- Our mission
Our mission is built around accuracy, transparency, and reliability. We understand that researchers require dependable materials supported by proper documentation, strict quality control standards, and analytical verification.
By combining scientific expertise with modern quality assurance practices, Countrywide Peptides continues to support laboratories, universities, and independent researchers with carefully handled peptide materials designed exclusively for research purposes.
High Purity
Research Peptides
Transparent
Testing & COAs
Exceptional
Customer Service
Trusted by
Researchers
- How We Operate
Science-Driven. Quality-Focused.
Countrywide Peptides follows rigorous processes to ensure every product meets the highest standards of purity and quality.
Synthesis
Our peptides are synthesized using advanced solid-phase peptide synthesis (SPPS) techniques.
Purification
Peptides are purified using high-performance liquid chromatography (HPLC) to ensure maximum purity.
Testing
Every batch is tested by independent, third-party labs using HPLC and mass spectrometry.
Certificates of Analysis
Detailed COAs are provided for each batch, ensuring transparency and confidence in our products.
Packing & Shipping
Peptides are lyophilized, securely packaged, and shipped with care to maintain stability and quality.
- Quality you can Trust
Tested. Verified. Guaranteed.
We take quality seriously—every peptide is tested for purity and identity by third-party laboratories using HPLC and mass spectrometry.
Third-Party Tested
All peptides are analyzed by independent labs.
COAs
COAs are available for every batch.
Consistent Quality
Reliable purity and identity you can count on.
You can easily verify your COAs by visiting the Testing & COA section.
- GET IN TOUCH
Contact Us
We’re here to help! Whether you have a question about our products, need assistance with an order, or want to learn more about our services, our team is ready to assist you.