Scientists have discovered a new type of depression. It is related to the biological clock.

A recent study published in the British Journal of Psychiatry identified a new subtype of depression called "circadian depression," affecting 23% of participants with severe recurrent depression. This subtype is characterized by disruptions in circadian rhythms, including seasonal patterns, delayed sleep onset, and extreme fatigue upon waking. Patients with circadian depression experience more severe symptoms, including suicidal thoughts and psychotic symptoms, and show a higher genetic risk for ADHD and mood disorders. Traditional antidepressants are less effective for this group, suggesting the need for therapies focused on regulating circadian rhythms, such as light therapy and melatonin supplementation. This discovery paves the way for personalized treatment approaches, particularly for young individuals seeking psychiatric help.