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Seasonal Affective Disorder
Beginning of essay
, or SAD, is a common problem of people
living in northern United States. People who are affected by this disorder
commonly suffer from depression, lethargy, inability to concentrate, overeating
and weight gain. People from the north tend to suffer more from this disorder
because of the shortene ....
Middle of essay
....ffect on suppressing
melatonin. It is known that melatonin levels in urine are five times higher at
night than they are in the day. It was not until a 1980 study that it was known
that melatonin levels could be directly suppressed with light. In an experiment,
subjects were woken up at two in the morning and exposed to a half an hour of
artificial sunlight. The findings were that melatonin levels were greatly
decreased. The decline in melatonin usually happens in the early morning, but
in a.... |
| Number of words: 1047 |
Approximate pages: 4 |
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