Researchers at the Feinberg School of Medicine at Northwestern believe it may be possible to diagnose depression using a blood test. According to Eva Redei, a professor of psychiatry at the university ...

Depression-related fatigue is caused by cellular "overworking" at rest and a failure to produce energy under stress.

Feeling persistently sad, exhausted, or hopeless doesn’t always mean you’re dealing with clinical depression. Several medical conditions create nearly identical symptoms that can fool both patients ...