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Go to bed wearing earplugs! A joint study between British and Swedish researchers found that people who feel foggy and slowed-up in the morning probably aren’t producing enough cortisol – a natural brain-energizer that wakes us up, and heightens our alertness. But wearing earplugs to bed blocks low levels of overnight noise – like nearby traffic, or a barking dog… And research shows that when the quality of our sleep improves, our brain churns out more cortisol in the morninggiving us more focus and energy.

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