Sentence (5): 'Researchers are not certainly what causes SAD.'

Are You SAD? (1) For many healthy people, the coming of winter gets them down. (2) Some hibernation tendencies are common. (3) If you notice true depression a sense of hopelessness less energy, or anxiety, you may be suffering from seasonal affective disorder or SAD. (4) Some people experience SAD during spring and summer for most people, however, winter is the season to be SAD. (5) Researchers are not certainly what causes SAD. (6) One suggestion is that having our regular body rhythms disrupted when less sunlight is available is the culprit. (7) Another study blames increased production of... Show more

Are You SAD?

(1) For many healthy people, the coming of winter gets them down. (2) Some hibernation tendencies are common. (3) If you notice true depression a sense of hopelessness less energy, or anxiety, you may be suffering from seasonal affective disorder or SAD. (4) Some people experience SAD during spring and summer for most people, however, winter is the season to be SAD. (5) Researchers are not certainly what causes SAD. (6) One suggestion is that having our regular body rhythms disrupted when less sunlight is available is the culprit. (7) Another study blames increased production of melatonin: a hormone related to sleep. (8) During the dark winter months, the body makes more melatonin. (9) At the same time, it makes less serotonin: the brain chemical that effects our moods. (10) Fewer sunlight means less serotonin. (11) So far, risk factors has not been identified. (12) Most people with SAD just tough it out and waiting for spring. (14) If you have symptoms that last more than two weeks, it is time to see a doctor. (15) People with mild cases of SAD need to spend time outside, exercise regularly, and go to social events or travel. (16) The good news is that spring always comes?   

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