Light Exposure at Night Can Destroy Your Thyroid

STORY AT-A-GLANCE

  • Exposure to outdoor light at night, which disrupts circadian rhythms, may increase the risk of thyroid cancer
  • Those in the highest quintile of nighttime light exposure had a 55% increased risk of thyroid cancer compared to those in the lowest quintile
  • One way circadian disruption may be linked to thyroid cancer is by inducing insulin resistance
  • Light exposure at night also causes sleep trouble, and chronic sleep deprivation is linked to disruption of rhythmic thyroid stimulating hormone secretions, which is associated with an increased risk of thyroid cancer

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