The SCN, which is regulated by light exposure, influences metabolism and food intake through its links to the autonomic nervous system and endocrine pathways
Anatomical tracing experiments revealed neural links between the SCN, liver and pancreas. The latter is involved in the rhythms of glucose metabolism by influencing hepatic glucose production and insulin secretion. Peripheral clocks in organs contribute to energy metabolism and are also synchronised through the SCN.
Increase in exposure to artificial light parallels prevalence of obesity, study finds
Increased exposure to artificial light in the evening is associated with adverse effects on metabolism, including changes in energy expenditure and eating habits. Reduced exposure to natural light during the day, as people are indoors in buildings with lower light intensity and quality, also contributes to the observed relationship between light exposure and obesity.
