Experimental gerontology

Melatonin suppression by blue light decreases with age

Circadian Biology Weekly Brief ↗PubMed ↗DOI ↗

Updated

Abstract

Significantly reduced melatonin suppression was observed in elderly subjects after exposure to short wavelength light (456 nm).

  • Elderly individuals may experience impaired circadian rhythm regulation due to reduced melatonin suppression.
  • Age-related changes in lens density are associated with decreased transmission of short wavelength light.
  • Short wavelength light is known to be more effective in suppressing nocturnal melatonin compared to medium wavelength light.
  • Young premenopausal and postmenopausal women were compared to evaluate differences in melatonin suppression.
  • The results suggest that age may impact the effectiveness of light in suppressing melatonin levels.

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