The Condition Known as Seasonal Affective Disorder (SAD) May Be

Question

The condition known as seasonal affective disorder (SAD) may be caused by
A) increased levels of melanin.
B) increased levels of melatonin.
C) increased levels of melanocyte-stimulating hormone.
D) increased levels of gonadotrophins.
E) decreased levels of testosterone.

Accepted Answer

Seasonal affective disorder is linked to decreased exposure to sunlight, which can lead to an increase in the hormone melatonin. This increase in melatonin levels is believed to be a contributing factor in the development of SAD symptoms.