It is both healthy and life-extending to get plenty of summer sun, which is our main source of vitamin D. Just make sure not to get a sunburn. According to a large population study from University of South Australia, too little vitamin D in the blood is linked to early death, especially because of an increased risk of cardiovascular disease, cancer, and respiratory diseases. This is very relevant because, apart from the lack of sunshine during winter, things like sun awareness campaigns, indoor living, being overweight, and having dark skin can contribute to the widespread lack of vitamin D. The official recommendations for vitamin D intake are also comparatively conservative. Therefore, people should strive to optimize their levels of the nutrient, as vitamin D is involved in regulating countless gene activities and other functions in the body.
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