COA basics
What to check on a certificate of analysis.
Connect the report to a compound, batch, date, vendor, and laboratory before using it as evidence.
Read the COA guideGuides
How to read vendor records and compare prices.
Practical notes on COAs, exact-product comparisons, and the way PepGrades handles missing information.
Featured guide
Testing records
Testing · 6 min
What a COA can and cannot show
A certificate is useful, but only when you can tell what was tested, when, by whom, and for which batch.
Read article Price · 5 min
How to compare peptide prices fairly
A lower sticker price is not always a lower price for the same amount, form, and package.
Read article Evidence · 5 min
Why missing information stays neutral
Not finding a reliable source is different from finding evidence that something went wrong.
Read article