Certificate of Analysis (COA) — Testing Information

Certificate of Analysis and Testing Documentation

This page explains what to look for in a certificate of analysis (COA), the difference between manufacturer and third-party reports, and what documentation to request for a specific product. Availability of a report must be confirmed for the relevant product and lot; this page does not certify that every product has undergone any particular test.

What Is a COA?

A COA records analytical results for the sample or batch identified in the document. Look for the product or sample name, batch or lot identifier, issuing laboratory, report identifier, analysis date, methods, results, and any limitations. Reports vary in scope: a result for one test does not establish results for tests that were not performed.

Manufacturer Reports and Third-Party Reports

A manufacturer COA reports testing supplied by the producer. A third-party report is issued by a separate testing laboratory. The laboratory's name alone does not establish independence or show that it tested the exact lot being sold. Check who submitted the sample, what sample was tested, and how its identifier connects to the product lot. Neither type of report should be described as independent verification without supporting evidence.

What Documentation Can You Request?

Contact us with the exact product name, the lot number shown on its label, and your order number if applicable. Ask whether the following documentation is available for that lot:

• The complete COA or laboratory report, including report number, dates, methods, and results.
• Confirmation of whether the report comes from the manufacturer or a separate laboratory.
• Information connecting the tested sample to the product lot.
• Supporting analytical data, such as chromatograms or spectra, where available.
• A laboratory-provided way to authenticate the report, where available.

These are requests for documentation, not a promise that every document or test is available. Any document shared or linked should first be checked for authenticity and relevance to the identified lot. No verified report downloads are included on this page.

How to Review a Report

• Match the product and lot identifiers to the item you are reviewing. An unmatched or unidentified sample cannot establish results for your lot.
• Check the report date and identifier. A recent date alone does not demonstrate a lot match.
• Confirm the issuing laboratory through its independently located contact details or its own report-verification service, if provided.
• Read the methods, units, results, and limitations together. Chromatographic purity, identity, content, and contaminant testing are different measurements; one does not substitute for the others.
• Ask for clarification if information is missing, inconsistent, or unclear rather than treating the report as conclusive.

Limits of Testing Documentation

A COA describes results for the sample tested under the stated methods and conditions. It is not a blanket purity guarantee, a guarantee for every vial, clinical validation, or evidence of safety or suitability for human use.