________ involves changes in the hormone melatonin.

Question

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Major depressive disorder with seasonal pattern, also known as seasonal affective disorder (SAD), is characterized by recurring depressive episodes that start and end around the same time each year, usually in winter. It is believed to be caused by changes in the circadian rhythm and levels of the hormone melatonin, which affects sleep and mood. Light therapy, medication, and psychotherapy are common treatments for SAD.

________ Involves Changes in the Hormone Melatonin