Maintaining the right level of vitamin D in your body promotes good health as it decreases the risks for heart disease, lung problems, viruses, and several types of cancer. In addition, many studies have shown that people with high levels of vitamin D are much less likely to have serious illness if they get Covid-19. The best way to optimize vitamin D is by getting regular sensible sun exposure. However, if this isn’t an option for you due to lack of time or poor weather, then daily vitamin D3 supplements (taken together with vitamin K2 and Magnesium) will allow you to reach the optimum level of 40 to 60 ng/mL.