As Sunlight Fades, Look Out for SAD - Health Day

If your mood, energy level, and motivation decline in November but bounce back to normal in April, you may have seasonal affective disorder (SAD), one expert says.

"SAD is thought to be related to a chemical imbalance in the brain brought on by lack of light due to winter's shorter days and typically overcast skies," says Dr. Angelos Halaris, chief of the psychiatry and behavioral sciences department at Loyola University Health System....