For all of evolutionary history, humans have lived in rhythm with the sun. We now have detailed scientific understanding of how the sun affects our brain chemistry, all our organs, and is required for our bodies to create vital nutrients. Our eyes and skin have complex mechanisms of taking in light and utilizing it for a staggering array of functions. Now, as indoor creatures, we are suffering a host of symptoms often attributed to diet…but overlooking LIGHT, the MASTER regulator of our hormones and neurotransmitters! Researchers can induce diabetes and other problems in animals by disrupting sleep and exposing humans to blue light at night.