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Sleep & Recovery

Sleep and the Brain: How Deep Sleep Cleans Your Mind

2026-05-247 min read|By Peak State Editorial Board
Sleep and the Brain: How Deep Sleep Cleans Your Mind

The Brain's Night Shift

While you sleep, your brain is busy cleaning itself. Scientists recently discovered that during deep sleep, the spaces between your brain cells expand. This allows a clear fluid to wash through and rinse away the waste buildup from the day. Without enough deep sleep, this waste stays behind, leading to brain fog, poor memory, and a higher risk of brain health issues later in life.

What Ruins Deep Sleep?

Many busy professionals spend enough time in bed but don't get enough deep sleep. Common culprits include:

  • Late Coffee or Alcohol: Both disrupt your sleep quality, even if you fall asleep easily.
  • Bright Screens Before Bed: Blue light tricks your brain into thinking it is still daytime.

Tips for Better Deep Sleep

  1. Cool Your Room: A cool room (around 65°F / 18°C) helps your body temperature drop, which triggers deep sleep.
  2. Wind Down Early: Dim the lights in your home 1 hour before bed.
  3. Try Magnesium: Taking a gentle magnesium supplement before bed can help relax your muscles and mind.
Medical Disclaimer

Disclaimer: The information in this article is for educational and informational purposes only. It is not intended as medical advice. Always consult a qualified medical professional or doctor for any health-related questions or concerns.

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