Vitamin D is an essential vitamin for bone and muscle health as well as to support the normal functioning of the immune system.
Vitamin D can be found in a variety of food such as oily fish, eggs, liver and fortified cereal and dairy products, humans can also absorb it from the sun.
With regard to Covid-19, the HSE advises that those who are self-isolating or who are unable to go outside should consider taking a daily supplement containing 10 micrograms of vitamin D to ensure a healthy vitamin D status for adults and children over the age of one.
The role of vitamin D supplementation in the prevention or treatment of COVID-19 has not been definitively established. The rationale for using vitamin D is based largely on immunomodulatory effects that could potentially protect against COVID-19 infection or decrease the severity of illness. Ongoing observational studies are evaluating the role of vitamin D in preventing and treating COVID-19. Emerging evidence in relation to this will be kept under review by the NPHET.