Prior to the use of electricity, human beings had an exclusively natural relationship to light. Our options were limited to the sun, a fire, or candlelight; all of which naturally emit red and near-infrared light.
That light acts as a nutrient for the human mind and body. Unfortunately modern, indoor lifestyles can lead people to become chronically depleted of natural light and its positive biological effects.
A lack of sunlight exposure can lead to a chronic deficiency of vitamin D3. Over time, this deficiency can put people at an “increased risk for many chronic diseases including autoimmune diseases, some cancers, cardiovascular disease, infectious disease, schizophrenia and Type 2 diabetes.”
…