How to manage Diabetes with daylight!

Diabetes is a growing concern in India, with millions of people affected by this metabolic condition. 

According to recent statistics, India has one of the highest diabetes rates in the world, with over 77 million individuals living with diabetes.

This chronic health issue not only affects the quality of life but also poses significant challenges to healthcare systems.

Shedding Light on Diabetes Management

In the quest to find innovative ways to manage diabetes, researchers have uncovered an unexpected ally: natural daylight.


A recent study conducted in a controlled environment exposed participants to two different lighting conditions—natural daylight and artificial LED lighting—during office hours.

The findings could have a profound impact on how we approach diabetes treatment and prevention.

The Study Setup

During the study, participants experienced two lighting conditions on separate occasions, with a four-week gap between them. Each intervention lasted 4.5 days.


Natural daylight, typically peaking at 12:30 pm with an average reading of 2453 lux, was pitted against constant artificial lighting at 300 lux.

Evening hours were spent in dim light, while the sleeping period remained in darkness. The participants were provided with identical meals during both interventions.

Promising Results

Continuous monitoring of blood sugar levels revealed that during the natural daylight intervention, participants maintained blood glucose levels within the normal range for longer periods compared to the artificial light intervention.


This suggests that exposure to natural light positively affects blood sugar control.

Energy Source Transition

The study also observed that participants exposed to natural daylight found it easier to switch from using carbohydrates to fat as an energy source, as indicated by a lower respiratory exchange ratio. This transition can be beneficial for individuals with diabetes.


Biological Clock Influence

The research delved into the genetic aspect, revealing that genes like Per1 and Cry1, which play a role in controlling our body’s internal clock, were more active in the presence of natural light compared to artificial light.


Metabolic Impact

While resting energy expenditure and core body temperature followed similar patterns in both lighting conditions, serum glucose and plasma free acids showed significant differences.


Serum insulin levels remained consistent, indicating that natural light’s impact on blood sugar control goes beyond insulin alone.

A Ray of Hope

The study’s results hint at the potential benefits of natural daylight in improving metabolism, blood sugar control, and possibly aiding in the management and prevention of type 2 diabetes and related metabolic conditions like obesity.


This discovery opens doors to innovative approaches in healthcare and underscores the significance of our environment in shaping our health.

By shedding light on the role of natural daylight in diabetes management, we may be one step closer to a brighter and healthier future for individuals living with diabetes in India and around the world.
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Dr. Kirti Sisodhia

Content Writer

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