The Diary Of A CEO with Steven Bartlett

No.1 Sleep Expert: Magnesium Isn’t Helping You Sleep! This Sleep Habit Increases Heart Disease 57%

3655 snips
Nov 17, 2025
Join Dr. Matthew Walker, a Professor of Neuroscience and Psychology, as he dives into the science of sleep. Discover how inconsistent sleep timing can lead to serious health risks, including increased heart disease. He reveals why magnesium and melatonin might be hindering your rest and introduces effective sleep hacks for immediate improvement, such as digital detoxing and light reduction. Learn about the crucial role of REM sleep and why altering your sleep habits could enhance cognitive performance and overall health.
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Anchor Sleep With Strict Regularity

  • Make regularity the priority: go to bed and wake at the same time every day, weekend included.
  • Tight timing (±15 minutes) anchors your circadian clock and boosts sleep quality and longevity.
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Cut Evening Light Below ~30 Lux

  • Lower evening light to below ~30–50 lux and use warm yellow lighting to boost REM by ~18%.
  • Use a free lux meter app to identify and reduce bright spots in your home before bed.
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Use The 20-Minute Rule For Insomnia

  • If you lie awake >20 minutes, get up to a different dimly lit room and return only when sleepy.
  • This breaks the learned association that the bed equals wakefulness and treats insomnia effectively.
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