What is Third-Party Tested?
Third-party tested means a product has been checked by an independent laboratory that has no stake in selling it, rather than only by the company that makes it. The independent lab verifies that what the label claims matches what is actually in the bottle.
Third-party testing is about who does the checking, which sets it apart from a certificate of analysis, the document that reports the results. It also differs from GMP certified, which covers how a facility operates rather than what a finished batch contains. Testing confirms identity and purity, but it is separate from whether an ingredient is a standardised extract in the first place.
Independent testing matters to anyone who wants assurance that a supplement contains what it says and is free of unwanted contaminants. The catch is that the phrase is easy to claim and hard to verify, since a brand can say it tests without ever showing the results, and a test only reflects the specific batch and the specific things that were checked.
You can see the independent results behind each batch on our science page.
Frequently asked questions
How is it different from a certificate of analysis?
Third-party testing is the act of an independent lab checking the product, while a certificate of analysis is the report that records what a test found. One is the process and the other is the paperwork it produces.
Who uses it, or when is it the right choice?
It is valued by buyers who want confidence in purity and label accuracy, especially for ingredients where contamination is a real concern. It is most reassuring when the actual results are made available to view.
When is it the WRONG choice?
The claim adds little when a brand states it but will not share the reports, since an unseen test proves nothing. It also cannot cover risks outside what the test was designed to look for.