Researchers link vitamin D deficiency to seasonal affective disorder

December 7, 2014 8:08 AM

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The research team - led by Alan Stewart of the College of Education at the University of Georgia - publish their findings in the journal Medical Hypotheses.

Seasonal affective disorder (SAD) - a form of depression that usually begins in the fall, continuing throughout the winter months - affects up to 10% of the US population. Symptoms include feeling sad or anxious, fatigue, concentration problems, irritability and feelings of guilt and hopelessness.

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