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If you often feel light-headed, tired, or irritable during the cold winter months, you may think it's a mild form of seasonal affective disorder (SAD). However, the real culprit may be something as simple as not drinking enough water.
While we don't typically associate cold weather with dehydration, the risk increases during the colder months, according to a University of New Hampshire study. Since we don't feel thirsty when the cold hits, we may fo.....
