> In particular, peanuts contain high amounts of L-arginine, a precursor for nitric oxide synthesis, which is essential for vascular function and blood flow regulation [6,11]. Therefore, this may represent a mechanism by which peanut consumption could positively influence cognitive performance through improvements in CBF. Furthermore, peanuts are a rich source of unsaturated fatty acids and polyphenols, both of which have been shown to support vascular health [12].

And there do seem to be papers that associate these two according to a quick google search (plus it's cited of course).