Which comes first? Poor diet or depression?
One could argue that, well, being depressed makes us more likely to eat unhealthy foods. This is true, so we should ask what came first, the diet or the depression? Researchers have addressed this question, thankfully. Another large analysis looked only at prospective studies, meaning, they looked at baseline diet and then calculated the risk of study volunteers going on to develop depression. Researchers found that a healthy diet (the Mediterranean diet as an example) was associated with a significantly lower risk of developing depressive symptoms.