GDF-15 Predicts Depressive Symptoms in Adults Aged 72 and Older

The global burden of mental health disorders often follows distinct chronological patterns, with the peak age of onset for mood disorders typically occurring in early adulthood [1]. However, the clinical presentation and underlying pathophysiology of depression in older adults are frequently complicated by systemic inflammation and the presence of comorbid somatic conditions [2]. While the gut-brain axis and various metabolic pathways have been implicated in the etiology of major depressive disorder, consistent biological markers remain elusive due to significant variability in study designs and patient populations [3]. Clinicians increasingly recognize that structural factors and chronic stressors also contribute to the risk of exhaustion and mental health decline across the lifespan [4]. A study published in the Journal of Psychiatric Research now offers specific insights into how growth differentiation factor 15 (GDF-15), a protein associated with cellular stress and aging, may track with depressive symptoms differently as patients age.