Why a COA Alone Does Not Prove Product Quality
A certificate of analysis shows what a laboratory found in one sample for the tests that were ordered. On its own, it doesn’t prove that your jar matches that sample, that the panel was broad enough, that the product is genuine, that it was stored well afterwards, that the label is accurate or that the product works. Product quality is judged by combining the COA with the batch match, supply chain, labelling, handling and the seller’s openness.
What Laboratory Accreditation Does and Does Not Tell You
Laboratory accreditation, usually to ISO/IEC 17025, tells you an independent body has assessed the laboratory as competent to perform specific tests reliably. It doesn’t tell you that the product is safe, that the right tests were ordered, that the sample represents your jar, or that the laboratory is independent of the brand. It is a sign the results can be trusted as measurements, not a judgement on the product.
Batch-Specific Evidence: Why the Batch Matters
The batch matters because shilajit is a natural material whose composition depends on where and when it was collected and how it was processed. Two batches from the same brand can differ in metals, minerals, moisture and fulvic acid. A laboratory report describes one batch, so it only tells you about your jar if the batch numbers match. That is why batch-specific evidence is the foundation of judging any shilajit product.
Why Commercial Shilajit Products Need Batch-Level Evidence
Commercial shilajit products need batch-level evidence because the raw material changes from one collection to the next, and commercial supply chains add more variables: different suppliers, blending, scaling up production and repacking. A report for one batch can’t vouch for the next. Batch-level testing, with each jar traceable to its report, is what lets a brand show that the product on sale today meets the standard it claims.
How Purification Can Affect Shilajit Quality Testing
Purification changes what is in shilajit, so it changes what testing finds. Water extraction removes rock, sand and insoluble debris, but metals and other substances dissolved in the water can pass through, and as water is removed, they become more concentrated. Moisture content also changes results. That is why the finished, purified batch is what should be tested, rather than raw material or an earlier stage.
What “Third-Party Laboratory” Actually Tells You
“Third-party laboratory” means the testing was done by a laboratory that is separate from the brand and its supplier. That adds independence compared with in-house testing, but it doesn’t tell you everything. It says nothing about whether the laboratory is accredited for the tests, which tests were ordered, which sample was tested, or whether it matches your batch. Treat “third-party tested” as a starting point and check those details.
Why Independent Testing and Brand-Provided COAs Are Different
Brand-provided COAs are laboratory reports commissioned by the brand, which chooses the laboratory, the sample and the tests. Independent testing means a party with no commercial interest buys the product as a consumer would and has it tested. Both can be valuable. Brand reports are the main evidence for most products and can be excellent, but independent testing adds a check on whether retail products match the brand’s documentation.
What “Not Detected” Means on a Laboratory Report
“Not detected” on a laboratory report means the substance wasn’t found above the lowest level the method can reliably detect. It doesn’t mean the substance is completely absent. Whether a “not detected” result is reassuring depends on that detection limit: it should be stated and sit well below the relevant legal limit. For microbiology, “not detected” refers to a stated sample size, such as 25 g.
What Detection Limits Mean on a COA
A detection limit is the lowest amount of a substance a laboratory method can reliably detect. Closely related is the quantification limit, the lowest amount it can measure with acceptable accuracy, and some reports use a reporting limit. These limits depend on the method, the instrument, the sample type and how much sample was used. They matter because a result can only be judged against a legal limit if the method’s detection limit is well below it.
How to Understand ppm, ppb and mg/kg on a COA
ppm, ppb and mg/kg are ways of expressing very small concentrations. 1 mg/kg means one milligram in every kilogram, which is the same as one part per million (ppm). 1 ppb, one part per billion, is a thousand times smaller and equals 1 µg/kg. Shilajit reports usually give metals in mg/kg, and UK supplement limits are in mg/kg, so that is the unit to compare. Converting between them just means moving the decimal point three places.