The Impact of Daylight on Mental Health: A Comprehensive Study

Individuals who spend more time in daylight have a lower risk of mental health disorders such as major depressive disorder, post-traumatic stress disorder (PTSD), psychosis, and self-harm behavior, according to an analysis of UK Biobank data. Conversely, greater light exposure during nighttime is associated with increased risks of major depressive disorder, generalized anxiety disorder, PTSD, psychosis, bipolar disorder, and self-harm behavior. The study highlights the importance of circadian rhythms and suggests that interventions to enhance mental health could involve optimizing light exposure patterns. However, the study's design does not establish causation, leaving open the possibility that mental health conditions may influence behavior and light exposure patterns.