Category Quality & Testing

Guidance on supplement testing, specifications, stability, documentation, traceability, and quality control.

Quality assurance specialist comparing a supplier certificate of analysis with an independent laboratory test report for supplement ingredients.

Quality & Testing

Supplier COA vs Third-Party Testing: When Should Brands Verify Results?

Supplement raw material identity testing with COA review, reference standards, and laboratory verification

Quality & Testing

Raw Material Identity Testing for Supplements: What It Verifies—and What It Doesn’t

Text: Supplement COA showing assay, microbiology, heavy metals, test methods, lot number, and specification results

Quality & Testing

How to Read a Supplement COA: A Practical Guide for Buyers