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Brewing & product

How we test, and what testing cannot tell you

What an NABL-accredited panel actually checks, why a batch number matters more than a brand promise, and the limits of any single report.

Published

Every claim on this site is attached to a batch number, because that is the only unit a laboratory can actually test. A brand cannot be tested. A batch can.

What accreditation means

A laboratory accredited by NABL to ISO/IEC 17025:2017 has been assessed on its methods, its equipment calibration, and its competence to run the specific tests listed on its certificate. The certificate has a scope and an expiry date, and both are worth checking ours are printed next to every report we publish.

Accreditation does not mean the laboratory checked everything. It means the things it did check were checked properly.

What a panel covers, and what it doesn't

A test panel is a list. Seven dyes on a report means seven dyes were looked for. It says nothing about an eighth.

This is the single most common way a clean-looking report misleads people, so on this site an untested parameter is rendered as its own state never folded in with the passes:

The three outcomes, as they appear on our result tables.
AnalyteMethodResultLimitStatus
Looked for, and absentHPLCNot detectedAbsentNot detected
Measured, and under the limitAn illustrative value, not a result from any batch.HPLC0.42 mg/kg10 mg/kgWithin limit
Not on the panelNo sample was analysed for this. Not tested

The middle row matters as much as the first. “Within limit” is a real measurement of something that is present in a permitted amount it is not the same claim as “not detected”, and we do not present them as though they were.

Reading a report yourself

Three things worth checking on any laboratory report, ours included:

  1. The batch and the dates. Does the batch on the report match the batch on the packet in your hand? Is the analysis date after the concern that prompted it?
  2. The parameter list. What was actually tested, and what is missing?
  3. The accreditation. Which body, which certificate number, and is it still valid?

Our published results are indexed by batch under Transparency, with the signed PDF attached to each one.