Humans have a kinship with other organisms in our need for sunlight and natural light. Natural light is the best source of light available and impossible to reproduce. Studies have shown that natural light or the lack of natural light can affect our mood states and lead to depression.
Light affects our levels of serotonin. When the neurotransmitter serotonin is in a healthy balance, we feel calm, alert and upbeat. Low light and low serotonin are linked to Seasonal Affective Disorder (SAD), PMS, depression, irritability, weight gain, alcohol abuse, and migraines.
For most people at least 20 minutes a day of sunlight is necessary for hormonal regularity and overall well-being. For people who suffer from SAD that need may be as high as 2 hours a day.
The Takeaway—For better health and well-being, take it outside!