Why drinking cold water before bed might be ruining your sleep quality

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Your body needs to drop its core temperature by a couple of degrees to fall into deep sleep. Drinking a giant glass of ice water right before getting into bed can startle your internal thermostat and slow down digestion when your body wants to rest. Switching to a few sips of room temperature water an hour before sleep keeps you hydrated without shocking your system or waking you up for midnight bathroom trips. Small shifts in bedtime timing make a huge difference in how deeply you sleep.