Understanding the Effects of Blue Light on our Physiological Well-Being: A Mini-review

This short review examines the effects of blue light exposure on human circadian rhythms, particularly its impact on melatonin suppression and sleep disturbances. While sunlight regulates our internal clocks, the growing prevalence of artificial light from digital devices has introduced significant blue light exposure, particularly in the evening. Blue light, with its higher energy and shorter wavelengths, has been shown to suppress melatonin more effectively than other wavelengths, disrupting sleep and human circadian rhythms. Beyond sleep disruptions, this alteration in circadian timing can lead to broader health concerns, including metabolic dysfunction, impaired gastrointestinal processes, and an increased risk of certain cancers. Despite the growing evidence of these adverse effects, many individuals remain unaware of the potential health risks posed by blue light exposure, especially in the evening and during sleep time. Practical solutions, such as blue light filters, device settings like night shift mode and reduced screen brightness, are recommended to reduce the harmful effects of blue light. To conclude, this paper calls for increased public awareness of blue light’s impact and emphasizes the need for further research into its long-term health implications, particularly regarding hormonal imbalances and mood disorders. It is also believed that an improved understanding of individual differences in susceptibility to blue light may also lead to personalized strategies for better circadian health in an advancing digital age.