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What is SAD?

Seasonal Affective Disorder or SAD is a "type of winter depression" which is thought to affect as many as twelve million people in the USA each winter between the months of September and March. A milder form is known as sub-syndromal sad or the winter blues and can affect the majority of the population at some time. This is sometimes known as the winter-blues. It is thought that as many as 35 million Americans suffer from the “winter blues”