Guides
What to test, and how to prove it
Plain explanations of the tests, limits and documents that decide whether your product gets listed. Written by the team that runs the panels.
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How to read a supplement certificate of analysis
What every section of a supplement certificate of analysis means, which fields retailers check first, and how to spot a COA that will not hold up.
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Heavy metals testing for supplements
Which heavy metals to test in supplements, the EU limits that apply, the methods labs use, and which product types carry the highest risk.
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Microbiological testing for supplements
The standard microbiology panel for food supplements, which organisms retailers require, why water activity matters, and how to avoid a failed batch.
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What EU rules expect you to prove
What EU rules expect you to be able to prove about a food supplement, which tests support label claims, and what retailers ask for on top of the law.
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Shelf life and stability testing
How stability studies prove a supplement shelf life claim, the difference between real time and accelerated testing, and which actives degrade first.