I think this is extremely possible. During my research into Paleo (which has helped me tremendously, and I suggest anyone who has trouble keeping off the pounds, performing at work, or focusing in life to take a look at it), I've considered the possible link myself, but since I'm not a scientist I didn't have any way of looking into this.
However, one of Paleo's major goals is to eliminating inflammation, and Paleo, for a large number of people, have lessened or completely eliminated the symptoms of depression, and I've seriously considered that there has to be some sort of link.
Edit: Not sure why I'm getting downvoted here. n=1 experimental data may not be the best thing, but in the absence of studies like the one linked to, its all we have to go on.
However, one of Paleo's major goals is to eliminating inflammation, and Paleo, for a large number of people, have lessened or completely eliminated the symptoms of depression, and I've seriously considered that there has to be some sort of link.
Edit: Not sure why I'm getting downvoted here. n=1 experimental data may not be the best thing, but in the absence of studies like the one linked to, its all we have to go on.