It turns out all those dinner parties might actually be good for your health. A recent study reveled that good friends impact your health as you age. The study, conducted at Northwestern University found that some elderly people credited their longevity and good health to fulfilling social lives — and they could be right. Researchers, found a notable link between brain health and positive relationships. The study looked at 50 elderly participants, periodically, over the course of nine years. The study looked at 31 “SuperAgers” — men and women over 80 who have memories comparable of those two to three decades younger then them — and 19 elderly folks with average cognitive abilities for their age. Every few years, the participants were asked to fill out surveys, take neuropsychological tests, brain scans and neurological examinations, among other evaluations. Of the 42-item survey on their psychological well-being, the greatest difference between SuperAgers and their…