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Nocturnal Light Exposure

Meaning

Nocturnal light exposure refers to the presence of artificial light during the biological night, which can disrupt the body’s natural circadian rhythm and suppress the essential nighttime production of melatonin. Even low levels of blue-spectrum light from electronic devices can register as daytime to the suprachiasmatic nucleus, signaling a misalignment between the external environment and internal hormonal timing. Minimizing this exposure is a fundamental tenet of chronobiology-based wellness protocols.