What a Certificate of Analysis Can Tell You About a Supplement Batch

A Certificate of Analysis, or COA, is useful only when it can be matched to the product, specification, and batch being reviewed. It should be treated as a controlled quality document, not as a generic marketing badge.

Key fields to check

• Product name or code and the approved specification.
• Batch or lot number and the relevant production or test date.
• Tests performed, methods or references where supplied, and reported results.
• Units, acceptance limits, and whether the result is within specification.
• Approving laboratory or quality representative and document version.

Questions a buyer should ask

Does the COA cover the same formula and format that was approved? Is the test scope appropriate for the product and market? Can the batch be traced to the retained sample or production record? Are additional tests, allergen statements, identity tests, or stability information needed for the internal release decision?

Do not assume that one document proves every quality characteristic. The required testing package depends on the formula, format, market, specification, and release process. Ask the manufacturer to distinguish routine batch testing from optional or project-specific testing.

When requesting a quote, list the quality documents your team needs. Egreen’s contact page can be used to submit that document checklist along with the product brief.

Reference

FDA information on dietary supplements and regulatory documents can help define the questions for a U.S. market review; it does not replace a product-specific quality assessment.