Can sunshine aid recovery? Why hospitals once used sunlight as therapy

A viral video from the United Kingdom recently caught the internet's attention. It showed a critically ill woman being wheeled from her hospital room to a rooftop so she could spend time in the sunshine.

Many viewers were puzzled. How could sunlight possibly help someone recovering in intensive care?

The answer lies in a practice that was once common in medicine.

HOSPITALS ONCE PRESCRIBED SUNSHINE

Long before scientists discovered vitamin D, doctors noticed that patients often recovered better when exposed to fresh air and natural light. Across Europe, hospitals were designed with open-air wards, balconies and sun terraces where patients could rest outdoors.

One striking example comes from Leeds in the UK. A seriously ill patient who had spent weeks indoors was regularly taken outside as part of her care. Doctors reported improvements in her mood and strength during recovery, although sunlight was only one part of her overall treatment plan.

WHY SUNLIGHT MATTERS

Modern science now offers several explanations for these observations.

When sunlight reaches the skin, the body produces vitamin D, a nutrient essential for bone health, muscle function and immunity. Vitamin D deficiency has been linked to weakened bones, muscle weakness and a higher risk of certain infections.

But sunlight's benefits go beyond vitamin D.

Exposure to natural daylight helps regulate the body's circadian rhythm – the internal clock that controls sleep and wake cycles. A healthy circadian rhythm supports better sleep, alertness, hormone regulation and overall well-being.

Experts say sunlight exposure can help synchronise the body's circadian rhythm, which influences sleep, alertness, hormone regulation and recovery. Neurologists also note that access to natural daylight may improve alertness and help patients maintain normal biological rhythms during prolonged hospital stays.

THE INDOOR LIFE CHALLENGE

The issue is particularly relevant today. People spend increasing amounts of time indoors, whether at work, at school or in front of digital screens, reducing exposure to natural daylight that previous generations received more regularly.

Experts increasingly argue that healthcare facilities, rehabilitation centres and even urban spaces should be designed to maximise access to daylight and outdoor environments whenever possible.

A LITTLE SUN GOES A LONG WAY

Doctors emphasise that sunlight should be enjoyed safely. Excessive exposure can damage the skin and increase the risk of sunburn and other health problems.

However, even a short morning walk or a brief period outdoors can provide meaningful benefits for many people.

The Leeds case is a reminder that health is shaped not only by medicines and medical technology, but also by factors such as sleep, light, movement and the surrounding environment. While sunshine is no substitute for treatment, experts say regular, safe exposure to daylight remains an important part of overall health.