Third party testing helps assure you are getting exactly what you paid for. A vendor can tell you whatever they want but if an independent third party registered lab is certifying it, what they say will carry more weight.
Let’s go into detail about what that means. A third party lab is a lab that is not run by the vendor or the manufacturer (first and second parties). The third party lab should also be independent, meaning they are not controlled by the other parties and have no conflict of interest about the results of analysis.
It’s important the lab is reputable. If the lab doesn’t know what they’re doing or cuts corners it means their analysis might not be valid. There is a lot of fraud in the analytical chemistry industry, and it’s important to work with companies that value integrity and ethics. We’ve seen unethical labs ask their clients what they want the results to say, before they even get a sample in.
We work hard to assure our contract labs are both ethical and use well validated analytical methods.