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World’s Largest Sleep Study Shows Too Much Shut-Eye Can Be Bad for Your Brain

Summary by Dr. Joseph Mercola

A new study not only confirms that the “sweet spot” for sleep is seven to eight hours a night, but also that getting too much sleep can be just as bad for you as getting too little. Neuroscientists from Western University’s renowned Brain and Mind Institute published their findings in the journal SLEEP. With 40,000 participants around the world, the researchers determined that too much sleep can result in cognitive impairment as great as that experienced by those who slept...

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