How does the sun really affect your health?

When it comes to the sun, opinions differ: is it a natural fountain of youth or a secret health risk? The fact is that sunlight affects our body on several levels - both positively and negatively. But how much sun is good and when does it become critical?

Why sunlight can prolong your life

Studies show that people who regularly spend time outdoors live longer on average than those who spend most of their time indoors. One study found that sun lovers live up to two years longer on average. And this is not an isolated case: a meta-analysis of 143 studies with a total of 290 million participants from 20 countries shows clear health benefits of daylight.

The health benefits of sunlight

Sunlight has been shown to have several positive effects on the body:

• Lower risk of cardiovascular disease: Studies show that regular, moderate sun exposure is associated with a lower risk of high blood pressure and cardiovascular disease.

• Reduced risk of diabetes: There is evidence that daylight can improve insulin sensitivity and thus reduce the risk of type 2 diabetes.

• Better sleep quality: Sunlight regulates our circadian rhythm and helps stabilize the sleep-wake cycle, leading to deeper and more restful sleep.

• Less stress: Sunlight promotes the production of serotonin, a neurotransmitter that ensures a good mood and relaxation.

But beware: the downsides of the sun

As many benefits as sunlight offers, too much of it can be harmful. UV rays in particular increase the risk of skin cancer and accelerate skin ageing. Scientists therefore recommend a balance: soak up 15 to 20 minutes of sunlight a day, but with moderation and UV protection.

Conclusion: The right dose makes all the difference

Sun can be a real health booster if you enjoy it consciously. Regular time spent outdoors can increase your life expectancy, strengthen your immune system and improve your mood. But as is so often the case, the right balance is crucial. So, get out there - but don't forget the sunscreen!

Sources:

1. Lindqvist, P. G., Epstein, E., Nielsen, K., Landin-Olsson, M., Ingvar, C., & Olsson, H. (2014). Avoidance of sun exposure as a risk factor for major causes of death: a competing risk analysis of the Melanoma in Southern Sweden cohort. Journal of Internal Medicine, 276(1), 77-86.

2. Bouillon, R. (2018). Comparative analysis of nutritional guidelines for vitamin D. Nature Reviews Endocrinology, 14(8), 462-466.

3. Young, A. R., & Narbutt, J. (2019). Sunscreens and vitamin D. Photodermatology, Photoimmunology & Photomedicine, 35(4), 314-317.

4. Feneis, J. F., & Armbrecht, J. H. (2020). Sunlight exposure and health outcomes: a systematic review. American Journal of Lifestyle Medicine, 14(3), 272-283.