By Jacqueline Silvestri BanksPublished June 26, 2013FoxNews.com Dark under-eye circles and grogginess aren’t the only side effects of lack of sleep. While these signs may show the world that you’re tired, the worst side effects are some you might not even have attributed to your late nights. Difficulty losing weight, inability to concentrate, impaired judgment, low sex drive, depression and reduced insulin sensitivity are all side effects of not getting enough sleep. According to The National Sleep Foundation, the average adult needs between seven and nine hours of sleep per night. Trying to catch up on sleep...
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