Natural Sunlight May Improve Mood and Reduce Insomnia

Panoramic view of colorful sunrise in mountains. Filtered image:cross processed vintage effect.Sleep disorders are pervasive, with approximately one in three adults suffering from mild insomnia. As stress levels rise around the world, insomnia is becoming more prevalent in adults. But a new study led by Monash University has found that getting enough natural sunlight each day could help to reduce insomnia and improve mood.

The study published in the Journal of Affective Disorders included more than 400,000 participants from the UK biobank program. It was found that a lack of daytime light exposure was a risk factor for poor mood, insomnia, and depressive symptoms.


Researchers noted that most messaging around health and light is focused on avoiding light at night. Previous research has found that light during nighttime can disrupt the body clock, also known as circadian rhythm. This study helps to highlight the importance of getting enough daylight to ensure the body can function optimally.

Circadian Rhythm

Circadian rhythm is a natural internal process that regulates the sleep-wake cycle. It repeats roughly every 24 hours and can help guide the body to let it know when to sleep and when to be awake. It’s vital in helping to regain energy lost from being awake and performing daily activities.

Co-author of this study said, “In this study, we observed that the greater time spent in outdoor light during the day was associated with fewer depressive symptoms, lower odds of using antidepressant medication, better sleep, and fewer symptoms of insomnia.”

The reduction of these symptoms may be explained by the effect of light on circadian rhythm and the direct impact that sunlight creates on mood centers in the brain.

People tend to spend most waking hours in artificial lighting conditions and relatively bright nighttime light exposure. By making minor adjustments to a daily routine, some may improve their sleep, mood, and energy levels.


Researchers concluded the study by citing that insufficient exposure to daytime light could be a critical factor that contributes to poor sleep outcomes and depressive disorders. They suggest simple advice for everyone; when the sun is out, get as much light as you can, but after it sets, keep it dark.

This study helps to show the importance of daytime light. Researchers recommend exposure to bright lights first thing in the morning and spending time outdoors, getting enough sunlight during daytime hours. Exposure to blue light should be avoided, and bright lights at night should be turned off, screen time-limited, and lights in the bedroom blocked off.

By correcting your circadian rhythm, you will feel more awake during the day and sleepy at night. As this study also suggests, you can help boost mood and reduce episodes of insomnia.

Author Bio

Sarah began her interest in nutritional healing at an early age. After going through health problems and becoming frustrated with the conventional ways doctors wanted to treat her illness (which were not working), she took it upon herself to find alternative treatments. This led her to revolutionize her own diet to help her get healthier and tackle her health problems. She began treating her illness by living a more balanced lifestyle through healthy food choices, exercise and other alternative medicine such as meditation. This total positive lifestyle change led her to earn a diploma in Nutritional Therapy from Health Sciences Academy in London, England. Today, Sarah enjoys helping others by teaching healthy lifestyle changes through her personal consultations and with her regular contributions to the Doctors Health Press. Also, passionate about following her dreams in life, Sarah moved to France and lived in Paris for over 5 years where she earned a certification in beadwork and embroidery from Lesage (an atelier owned by Chanel). She then went on to be a familiar face sitting front row and reporting from Paris Fashion Week. Sarah continues to practice some of the cultural ways of life she learned while in Europe. They enjoy their food, and take the time to relax and enjoy many of life’s little moments. These are life lessons she is glad to have brought back home with her.