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Article: Can artificial light at night increase the risk of diabetes? Surprising results of a new study

Může umělé světlo v noci zvyšovat riziko cukrovky? Překvapivé výsledky nové studie

Can artificial light at night increase the risk of diabetes? Surprising results of a new study

Modern times have brought many changes to our lifestyles, including how we are exposed to light. Artificial lighting is ubiquitous and often disrupts our natural rhythms. A new study led by Daniel P. Windred reveals how these changes can affect our health, specifically our risk of developing type 2 diabetes.

A huge data set reveals connections

Windred's team analyzed an impressive amount of data—13 million hours of light sensor recordings and 670,000 person-years of prospective observation. This allowed the researchers to examine in detail how different patterns of light exposure are related to the incidence of type 2 diabetes.
The results are fascinating. People who spent more time in natural daylight and less under artificial lighting at night had a lower risk of developing diabetes. Conversely, those who were more exposed to artificial light, especially at night, were more likely to develop the disease.

Why is this important?

Type 2 diabetes is a chronic disease that affects millions of people worldwide. It is associated with a number of serious complications, including heart disease, nerve and kidney damage. Diabetes prevention is therefore key to improving public health.
This study suggests that one of the factors that can affect the risk of diabetes is how we are exposed to light. Natural daylight appears to play an important role in regulating our metabolic processes and can help maintain healthy blood glucose levels. Conversely, excessive exposure to artificial light at night can disrupt our biological rhythms and lead to metabolic disorders.

What can we do about it?

The results of the study offer some practical recommendations on how to optimize our exposure to light:
1. Spend more time outside during the day. Try to spend at least some time in natural daylight every day, whether it's a walk in the park or eating lunch outside.
2. Limit artificial lighting at night. Try to minimize the use of electronic devices and bright lighting in the evening. If you must work on a computer, consider using blue light filters or night modes.
3. Support a regular sleep pattern. Try to go to bed and get up at the same time every day. Exposure to morning light can help synchronize your body clock.


Windred's study brings new insight into how our light environment affects our health. It shows that simple changes in our daily light exposure habits can have a significant impact on the risk of type 2 diabetes.
Of course, this is just one study and more research is needed to fully understand all the connections. However, the results are compelling enough to start thinking about how we can optimize our exposure to light for better health.
So what do you say - let's go for a walk?​​​​​​​​​​​​

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