5. Your immune system is down
Depriving yourself of sunlight can negatively impact your immune system. Why so? Because your immune system needs the adequate amounts of vitamin D (for people older than 19 is 600 IU daily and for those older than 70 is 800 IU daily) to function properly.
The worst thing when it comes to a weakened immune system is that you are more prone to get infections and viruses. As if that weren’t enough, a study published in the American Journal of Clinical Nutrition found that having inadequate levels of vitamin D is associated with an increased risk of cancer, autoimmune diseases, hypertension, and infectious diseases.