Study links light pollution to Alzheimer’s risk in younger adults

Recent research published in Frontiers has identified a significant link between light pollution and the risk of Alzheimer's disease, particularly in individuals under 65 years old. The study highlights that exposure to outdoor light at night may be a modifiable environmental factor contributing to the prevalence of Alzheimer's. Over the past 25 years, artificial lighting has surged by at least 49% globally, raising concerns about its impact on health. While diabetes, high blood pressure, and stroke are more strongly associated with Alzheimer's in older adults, the study found that for younger individuals, higher nighttime light intensity correlates with a greater prevalence of the disease than any other examined risk factor. This suggests that urban living and lifestyle choices may increase exposure to artificial light at night, exacerbating health risks. Researchers recommend practical solutions to mitigate exposure, such as using blackout curtains or sleeping with eye masks, especially for those residing in areas with significant light pollution. These changes are relatively easy to implement and could help reduce the associated risks of Alzheimer's. The findings raise questions about the potential for societal change regarding light pollution, similar to the movement against single-use plastics. As awareness grows about the health implications of light pollution, there may be a push for more responsible outdoor lighting practices to protect public health and well-being.