[vikingerik]

Just Wikipedia. It cites two studies that found values of 8-13 mg and 3-32 mg per decaf cup, compared to regular which is 95-200. https://en.wikipedia.org/wiki/Decaffeination

[esperent]

The linked Wikipedia "study" is this science daily article:

https://www.sciencedaily.com/releases/2006/10/061012185602.h...

And that article links back to this UFL press release. I've clicked every link I can find and there's not an actual, published study to be found anywhere:

https://archive.news.ufl.edu/articles/2006/10/uf-experts-dec...

But even if there was, is a study from 20 years ago still relevant?