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Seasonal Affective Disorder

Seasonal affective disorder (SAD) is associated with winter depression and feeling “normal” or very happy in the summer. It affects up to 20% of the adult population in the UK, making the winter months unhappy for many of those who sufferer from the disorder. Typically, individuals with SAD feel depressed; they generally slow down, over sleep, overeat, and crave carbohydrates in the winter. In the summer, these same patients feel elated, active, and energetic. Although many variables may be responsible for SAD, lack of exposure to full-spectrum natural light appears to be the most logical explanation.


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