How to read a peptide COA
Match the material and lot, identify the issuer, and work through methods, units, results, and report notes.
Read the guideThe research reading room
Peptide research guides.
Clarity before you order.
Start with the question in front of you. These guides explain research documentation, analytical terminology, and the details to review when comparing materials.
Purity, content, and identity
Learn what a percentage can describe, how quantity is reported, and why an identity result answers a separate question.
Read the guideCOA vs. SDS: what is the difference?
Compare analytical reports with safety information and see which document to consult for each question.
Read the guideA research peptide supplier checklist
Organize the product details, lot records, report references, and support answers you need before choosing a supplier.
Read the guideLooking up a term?
Find plain-language explanations of COA, SDS, lot numbers, sample IDs, test methods, and report terminology.
A useful starting point
Match the guide to your question.
- You have a report.
Use the COA guide with the complete document open beside it. Write down the product and lot before comparing individual results.
- You are comparing numbers.
Read the guide to purity, content, and identity. Keep each result attached to its method, units, and reporting basis.
- You are deciding what to request.
Use the supplier checklist to organize the evidence you have and the questions you still need answered.
For the wider picture, visit our introduction to testing and COAs. For a question about an Everyday Peptides document, contact the team with the product and lot information.
A clearer choice starts here.
Explore the catalog, review the product documents, and ask us about the details that matter to your research.