The Complex Effects of Light on Metabolism in Humans



The paper discusses the complex effects of light on human metabolism, focusing on the role of light in human physiology, metabolic regulation, and the influence of the circadian hormone melatonin on sleep and metabolic physiology.


  • Diabetes and metabolic syndrome: The paper discusses how light exposure is linked to metabolic abnormalities such as an increased risk of obesity and diabetes.
  • Sleep and insomnia: The paper discusses how light exposure is closely linked to sleep regulation and how disruptions due to light are linked to metabolic abnormalities.
  • Cognitive function and memory: The paper discusses how light exposure affects the circadian rhythm and sleep-wake regulation, which are crucial for cognitive function and memory.
  • Hormone regulation: The paper discusses the role of the circadian hormone melatonin, which is light-sensitive, in sleep and metabolic physiology.
  • Lighting Design Considerations: The paper discusses the properties of light that influence metabolism, including intensity, duration, timing of exposure, and wavelength.
  • Well-being: The paper discusses the potential negative consequences for human health due to increased light exposure at unwanted times or a reduced dynamic range of light between the daytime and nighttime.


A Ishihara, AB Courville, KY Chen
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