New research, published earlier this week in the Proceedings of the National Academies of Science, purported to identify the first biomarker for clinical depression.
What most media outlets failed to note was that this was not the first study to look at cortisol levels and their relationship to depression. In fact, it’s an area of research that has quite a few studies.
And what has the vast majority of the research in this area found? That a saliva biomarker test for depression is still a long ways away from becoming a reality.