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Methodology

Independent Lab-Testing Methodology

When Best Shilajit UK commissions its own laboratory tests, we buy the product as an ordinary customer, send sealed samples to an accredited laboratory, and publish the full report with the batch number. This page sets out how those tests are run and reported, and how they differ from reports that brands commission themselves.

Updated 4 October 2026Part of How we research & review

On this page

How a commissioned test is run

  1. Buy anonymouslyFrom the brand or a normal retailer, at the normal price.
  2. Record the batchBatch number, date mark and photographs before opening.
  3. Send sealed samplesTo a laboratory accredited to ISO/IEC 17025 for the tests requested.[1]
  4. Test a defined panelLead, cadmium, mercury and arsenic as a minimum, with microbiology and, where possible, inorganic arsenic and thallium.
  5. Publish in fullThe complete report, the batch number and our reading of the results against GB limits.[2]

Our tests vs brand-commissioned reports

How the two kinds of report are labelled
ReportWho chooses the sampleHow we label it
Brand-commissionedThe brandBrand-published report; reviewed under our labels
Commissioned by usUs, from a retail purchaseBest Shilajit UK test, with the purchase details

Both can be good evidence. The difference is who chose the sample. See independent testing vs brand COAs.

Where results appear

Commissioned results are listed on our independent test programme and added to the relevant brand evaluation. Changes are recorded on the updates log.

Sources & further reading

Primary research, regulators and standards bodies are cited first. A source being listed here does not mean it supports every claim made by sellers; it supports the specific statement it is attached to.

  1. ISO/IEC. ISO/IEC 17025:2017 General requirements for the competence of testing and calibration laboratories. iso.org, 2017. View source (opens in a new tab) [International standard]
  2. European Commission (UK version on legislation.gov.uk). Commission Regulation (EC) No 629/2008 amending Regulation (EC) No 1881/2006 setting maximum levels for certain contaminants in foodstuffs. legislation.gov.uk, 2008. View source (opens in a new tab) [UK legislation (retained)]