Vitamin D plays a wide range of roles in the body, including regulating calcium levels, maintaining healthy bones and teeth, and supporting the immune system.
In addition to getting vitamin D from dietary sources, the body can make its own in the skin through exposure to sunlight.However, it can be difficult for people with dark skin and those with low exposure to sunlight to maintain sufficiently high levels of the vitamin, especially during the winter months.Stay informed with live updates on the current COVID-19 outbreak and visit our coronavirus hub for more advice on prevention and treatment.One study found that, overall, about 42% of people in the United States were deficient in vitamin D.