Dark roast coffee yields the highest quantities of phenylindanes, seemingly making it the best pick for brain health. However, exactly how beneficial the compounds are is still unknown, Mancini said.

Tassimo Gevalia Dark Roast Coffee Single Serve T-Discs (5 Boxes). Image via Amazon. This dark roast blend is filled with bold flavours to really wake up your senses. $33 $47 at Amazon. The reviews ...

Tassimo Gevalia Dark Roast Coffee Single Serve T-Discs (5 Boxes). Image via Amazon. This dark roast blend is filled with bold flavours to really wake up your senses. $33 $47 at Amazon.