Study links depression to circadian rhythm issues

A study by researchers from the Brain and Mind Centre at the University of Sydney, published in the British Journal of Psychiatry on October 20, 2026, examined how certain types of depression may be connected to problems with the body's internal clock.

Circadian rhythm explained

The circadian rhythm, often referred to as the "biological clock," is a natural system that controls various bodily functions such as sleep, wakefulness, body temperature, and appetite over a 24-hour period.

Disruptions affect sleep and mood

When this internal clock becomes out of sync—due to factors like irregular schedules or insufficient daylight during the day—sleep patterns and mood can be negatively affected, according to the study.

Findings suggest a link to depression

The research indicates that disruptions in the circadian rhythm may play a role in either causing or worsening symptoms of depression, highlighting the importance of maintaining a regular daily routine for mental health.