Make sense of every field.
Lot numbers, testing methods, dates, results, and acceptance ranges—explained in plain language.
Read a COAUnderstand your COA
A certificate is a starting point, not a guarantee. Learn to read a Certificate of Analysis, check its source, and understand what the results actually cover.
Independent documentation literacy. Free to read.
Beyond the PDF
SOURCE FIRSTA complete report, with the lot, methods, results, and specifications.
Confirmation with the issuing pharmacy and, where applicable, the laboratory.
Evidence that the report relates to the specific lot being checked.
Our publication standard—not a live record.
No document is displayed before source confirmation.
Know what you’re looking at
Work through the paperwork without confusing a lab result with a safety verdict.
Lot numbers, testing methods, dates, results, and acceptance ranges—explained in plain language.
Read a COAFind the issuing lab independently and check that the report and the lot belong together.
Follow the verification stepsA COA does not establish FDA approval, handling history, or whether a treatment is right for you.
Understand what it can’t proveA practical place to start
Appearance alone cannot establish authenticity. Use these five steps to ask better documentation questions.
Open the full verification guideClarity before conclusions
COA Registry is operated by PepKey. We organize documentation—not product endorsements or medical advice.
Read our source-verification standard