A new study has found that ambient light exposure is associated with weight gain in school-age children. The study, completed by Dr. Cassandra Pattinson and his colleagues from the University of Queensland Science in Australia, was published in the international research journal PLOSONE. Complex mechanism of obesity: environmental light cannot be ignored The potential mechanisms leading to the evolving global obesity situation are not only the clichéd increase in calorie intake and decrease in physical activity, but recent studies have also found that reduced sleep duration, irregular sleep habits and changes in gut flora are also associated with it. However, to date, these factors have not been studied thoroughly enough to suggest interventions that effectively and consistently reduce the incidence and prevalence of obesity. Recent evidence suggests that environmental light may be one of these factors that cannot be ignored. The evidence from several studies is overwhelming. Animal studies have shown that the duration and intensity of light exposure is critical to metabolic function and body weight status. Rodents exposed to sustained low levels of white light also exhibit signs of metabolic syndrome, with increased obesity, increased occurrence of glucose intolerance, reduced sympathetic activity, and altered caloric intake and activity. Studies in adults have shown that exposure to moderate light intensity in the evening or later is associated with weight gain, and this study in children by Dr. Cassandra Pattinson similarly suggests that light plays a very important role in weight change in preschool children. Mechanisms by which ambient light affects weight Light exposure has significant effects on weight, including various aspects of weight, sleep, and activity. Possible mechanisms include: First, increased light duration means insufficient time in the dark for normal recovery processes and insufficient time for metabolic rest. In fact, the evening “haze” phenomenon and other artificial light sources are increasing by 20% per year, and children are increasingly exposed to a broader spectrum of light characteristics. Second, increasing daily light duration over time may provide the body with a biological signal similar to that of an endless summer day, potentially amplifying seasonal metabolic processes such as weight gain. In addition, the child’s initial light state may promote the occurrence of mediating phenomena, such as abnormal behavioral, physiological or metabolic changes, which instead cause changes in body mass index. The study is significant: indicating new directions for future research The study is the first to address the relationship between light intensity, time, and duration and children’s body weight. The results show a strong association between daily ambient light exposure and changes in children’s body weight, with baseline surveys showing that moderate light exposure led to an increase in body mass index, and after 12 months, children with more light exposure had higher body mass index. Ambient light, including light emitted from tablets, light emitted from cell phones, light from nighttime lighting, and light emitted from television, all mean that modern children are exposed to more bad lighting than any previous generation, and this additional light exposure is simultaneously causing obesity to increase. This is a groundbreaking study that reveals a new direction for childhood obesity prevention and intervention goals.