雅思阅读

📖 Reading Passage

The concept of 'circadian rhythm' refers to the innate biological cycles that regulate physiological processes in living organisms, typically synchronized with the 24-hour day-night cycle. Recent research has revealed that these rhythms are not merely responses to external light cues but are driven by an internal 'master clock' located in the suprachiasmatic nucleus of the brain. However, modern lifestyles, characterized by irregular sleep patterns, shift work, and excessive artificial light exposure, often disrupt this internal timing. Such desynchronization has been linked to metabolic disorders, cognitive impairments, and even increased cancer risk. Interestingly, studies suggest that timed eating and consistent exposure to natural light can help realign the internal clock with the external environment, offering a non-pharmacological strategy to mitigate the negative health impacts of circadian disruption.