A key element in brain health is nutrition, say researchers who believe the number one factor that you have control over in terms of your mental health is at the end of your fork. Susan Spencer talks with Dr. Drew Ramsey, a psychiatrist who in his book “Eat Complete” prescribes a healthier diet in order to combat depression; Samantha Elkrief, a trained chef and wellness coach; and neuroscientist Lisa Mosconi (author of “Brain Food”), for whom brain scans reveal the differences in brain structure between those who eat a Mediterranean diet and those who consume standard Western fare.