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Sleep Science

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EEG Studies Show Caffeine Cuts Deep Sleep Even When Time Asleep Looks Normal

Reduced slow-wave activity in EEG suggests weaker restorative brain recovery, prompting calls for tailored advice on caffeine timing and dose.

Presidents' Day Mattress Sales Hit Up to 60% Off as DreamCloud Tops Value Lists

UC Berkeley Study Maps Sleep Circuit That Drives Growth Hormone—and Signals the Brain to Wake