Chocolate good for the brain?

It is only within the last few years that I have developed more than just a passing appreciation for chocolate. As a child I associated chocolate with Hershey's Kisses, Snicker's bars, and various other popular treats. Oh they were good, don't get me wrong, but nothing to go gaga over and certainly nothing I wouldn't pass up for black licorice or wintergreen flavored Lifesavers. After reading a food blog or two I recently began experimenting with various, more exotic and rich, kinds of chocolate (the kind you break a tiny piece off, pop it in your mouth, let it slowly melt on your tongue, and sigh in pure bliss!) So, to get to the point of this post, I read a little news blurb about the beneficial effects of flavanols found in some kinds of cocoa. The only part about this article that bugged me a little was that the study was sponsored by Mars Inc. While I am a fan of good chocolate, I am not in favor of tampering with things chemically (or otherwise unnaturally) for the sake of "improving" beneficial effects. But maybe I am reading too much into things here...