While no one knows the exact cause of Seasonal Affective Disorder some hypotheses include that your circadian rhythm or your melatonin levels are off (Mayo Clinic). The most common and effective treatments is exposure to bright light in the morning. However taking melatonin may also help stave off Seasonal Affective Disorder is to take melatonin. According to a study by the National Institute of
Mental Health “taking melatonin at the correct time of day . . . more than doubled their improvement in depression scores.” (NIHM) If you take melatonin for Seasonal Affective Disorder you should take the dose in the afternoon not in the morning (Science Daily).
According to Future Science, “Melatonin has been safely used in humans for years, principally to reset biological clocks. It has other potential uses as a natural sleeping pill and in the treatment of Seasonal Affective Disorder and some forms of depression.” Melatonin may be helpful in treating Seasonal Affective Disorder because it “resets” your biological clock.