Natural light: benefits for your daily health and well-being

In a world increasingly dominated by enclosed spaces and screens, natural light has become a valuable resource that we often underestimate. However, its impact on our bodies is profoundly positive, both physically and emotionally.

What is natural light and what are its benefits for the body?

Natural light comes directly from the sun. It’s a source of clean, free, and essential energy for life.

• Circadian rhythm regulation. Natural light is key to synchronising our biological clock. Our bodies better regulate our sleep-wake cycles, resulting in more restful sleep and more energy during the day.
• Natural source of vitamin D. Moderate sun exposure allows our body to produce vitamin D, essential for bone health, calcium absorption, and strengthening the immune system.
• Improved mood. Sunlight stimulates the production of serotonin, a neurotransmitter that directly affects our emotional well-being. This helps to reduce stress, anxiety and symptoms of seasonal depression.
• Increased productivity and concentration. Working or studying in natural light improves concentration, memory and cognitive performance. It also reduces eye strain and improves overall comfort
• Connection with nature. Spending time outdoors not only exposes us to natural light but also connects us with our surroundings, promoting relaxation and emotional balance.

How natural light improves mood and sleep

• Biological clock synchronisation: exposure to sunlight during the day helps regulate the circadian rhythm, improving sleep quality and promoting restful nights.
• Serotonin production: natural light stimulates the production of serotonin, a neurotransmitter that improves mood and helps to combat depression.
• Stress reduction: well-lit environments with natural light can lower cortisol levels, the hormone associated with stress.
• Increased energy and concentration: people exposed to natural light tend to feel more alert and productive.

 
Natural light and vitamin D: a vital connection 

Vitamin D is essential for bone, immune, and muscle health, and the primary source for obtaining it is sunlight. But how does it work?

• Skin synthesis: when the skin is exposed to the sun’s UVB rays, it naturally produces vitamin D.
• Disease prevention: adequate vitamin D levels help prevent disease.
• Importance of balance: exposure should be moderate to avoid harm. About 10-30 minutes a day is enough, depending on the type of skin and the intensity of the sun.

Differences between daylight and artificial light

Natural and artificial light serve similar purposes in terms of illumination, but their effects on the human body and the environment are very different:

• Natural light has a full spectrum of colours and wavelengths that interact beneficially with the human body. It regulates the circadian rhythm, improves mood and promotes vitamin D production. In addition, exposure to sunlight stimulates serotonin, which contributes to emotional well-being and a greater sense of energy during the day.
• Artificial light, while useful for illuminating spaces when sunlight is unavailable, has a more limited spectrum and can have a negative impact on the body if used excessively or at inappropriate times. In particular, the blue light from
  screens and electronic devices can disturb sleep and lead to eye strain. Therefore, whenever possible, it is recommended to take advantage of natural light to improve physical and mental health.