Dr. Berg’s Healthy Keto and Intermittent Fasting Podcast

Why Your House is Making you Sick and Tired

Feb 18, 2026
They dig into how modern indoor lighting confuses the circadian clock and reduces vital light contrast. The conversation highlights melatonin suppression, blue light effects on sleep and cortisol, and links between nighttime brightness and metabolic risk. Practical fixes to restore bright days and genuinely dark nights are presented to help rebalance biology.
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INSIGHT

Loss Of Natural Light Contrast

  • Modern indoor lighting removes the natural contrast between bright days and dark nights that our circadian system evolved for.
  • This reduced contrast destabilizes mood, metabolism, hormones, and sleep quality.
INSIGHT

Lux Explains Light Intensity

  • Lux quantifies how bright light is and differs hugely between outdoors and indoors.
  • Outdoor sunlight can be 10,000–100,000 lux while typical indoor lighting is often 100–500 lux.
INSIGHT

Light Alters Hormones And Metabolism

  • Nighttime light exposure blunts or delays melatonin and can trigger cortisol via blue light.
  • These hormonal shifts reduce deep sleep and worsen blood sugar and insulin regulation.
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