Circadian Rhythm Disruption May Help Drive Major Depression Biology
TL;DR: A 2026 review in Annals of Medicine argues that circadian rhythm disruption in major depressive disorder (MDD) reaches beyond poor sleep, linking clock-gene variation, sleep-wake timing, stress-hormone rhythms, melatonin signaling, and chronotherapy targets. Key Findings 264 million affected: The review frames MDD as a leading global disability cause affecting more than 264 million people. …
