Reading A Certificate Of Analysis

Behind a Good Manufacturing Practice claim sits a stack of paperwork, and the sheet people occasionally ask for is the certificate of analysis. It is worth knowing what such a document actually says.

What a COA covers. Identity, which confirms the material is the species it says it is. Purity, which is mostly about contaminants: heavy metals, microbial counts, residual solvents. Potency, where the ingredient is standardised to a marker compound. And a batch number tying the sheet to a specific production run.

What a COA is not. Evidence that the product works. It is a quality document, not an efficacy document. A batch can be flawlessly clean, correctly identified and entirely honest about its contents while doing nothing at all for the person swallowing it.

Why identity testing matters more than it sounds. Botanical adulteration is a genuine problem in this industry, and it is usually economic rather than malicious: a cheaper related species substituted for an expensive one somewhere up the supply chain. Identity testing at intake is the step that catches it, and it is one of the things GMP exists to require.

Where the blend complicates things. A certificate can confirm the identity and purity of each raw material without publishing how much of each went into the final capsule. Quality documentation and dose disclosure are separate questions, and a proprietary blend answers the first while declining the second.

What to ask for, and of whom. The manufacturer, not an affiliate site. This domain does not hold batch records and would be making them up if it published any. GMP describes the facility standard; it is not an FDA approval of the product, and no dietary supplement sold in the United States carries one.