How-to guide
How to Request a COA from a Supplier
The exact words to use, how to phrase the request, what to do when a supplier stalls, and the scripts that get a batch-specific certificate instead of a generic PDF.
Information only. We do not sell products or give medical advice. Consult a licensed physician / healthcare professional.
Three action-first guides covering every step between placing a query and holding a verified Certificate of Analysis: how to request it, how to read batch and lot numbers, and what to ask before you ever place an order.
All guides
The exact words to use, how to phrase the request, what to do when a supplier stalls, and the scripts that get a batch-specific certificate instead of a generic PDF.
What batch and lot numbers actually mean, how manufacturers assign them, and the one cross-check that confirms a COA truly belongs to the material in your hand.
The full list of questions to send a supplier before committing: test method, issuing lab, accreditation, purity threshold, and how to read their answers for red flags.