According to this BBC News story, “Med-style diet ‘can battle blues'”, a Mediterranean-style diet can help to combat depression.
The Mediterranean diet, already thought to protect against heart disease and cancer, may also help to prevent depression, Spanish researchers say.
They found depression was more than 30% less likely to develop in people who followed a diet high in vegetables, fruit and cereals, and low in red meat.
Of course, I’m guessing living near the Mediterranean Sea can’t hurt, either. While it would be a sacrifice, I would be willing to participate in a long-term study to find that out for sure. ;)