Blue light (evening)

Evening blue light exposure from screens and artificial lighting can disrupt natural sleep patterns and affect various physiological processes. Several studies highlight how evening blue light impacts circadian rhythms, leading to delayed melatonin production and altered sleep onset. This disruption can also influence metabolic functions and cognitive performance. For instance, maternal exposure to evening blue light has been linked to changes in glucose levels and infant birthweight. Similarly, athletes with intermediate chronotypes experience impaired sleep quality and reduced cognitive and motor performance following evening blue light exposure. Despite these findings, the evidence is still evolving, and more research is needed to fully understand the long-term effects of evening blue light on human health.

Sources

• Evening blue-light exposure, maternal glucose, and infant birthweight. (PMID:35764595)
• Evening wear of blue-blocking glasses for sleep and mood disorders: a systematic review. (PMID:34030534)
• Systematic review of light exposure impact on human circadian rhythm. (PMID:30311830)
• Human circadian variations. (PMID:34396981)
• Evening exposure to a light-emitting diodes (LED)-backlit computer screen affects circadian physiology and cognitive performance. (PMID:21415172)
• Impact of evening blue light exposure timing on sleep, motor, and cognitive performance in young athletes with intermediate chronotype. (PMID:40656989)

_Worker-drafted node, Hermes writer enrichment, pending editorial review._