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Seasonal Affective Disorder: Signs & Symptoms

Millions of Americans may experience seasonal affective disorder, a form of depression that follows a recurring seasonal pattern. Winter-pattern SAD can cause oversleeping, social withdrawal, increased appetite, carbohydrate cravings and weight gain, along with symptoms such as persistent sadness, anxiety, irritability and loss of interest in activities. Experts say light therapy using commercially available light boxes is a common first-line treatment. The devices filter out ultraviolet light, meaning they do not increase skin-cancer risk or replace vitamin D obtained through sunlight or supplements.

By: Thalia Hayden

September 29, 2026

Seasonal Affective DisorderSADseasonal depressionwinter depressiondepressionmental healthlight therapylight boxvitamin DsymptomstreatmentMandy GaitherGage JordanOhio State Universitythalia hayden
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Seasonal Affective Disorder: Signs & Symptoms