Could Many COVID-19 Deaths Have Been Prevented?

Mounting research on vitamin D's effects on COVID-19 has more clinicians and researchers calling for its wider use

Modern life has taken us away from the sunlight and deprived us of our primary source of vitamin D, a nutrient critical to our health and immune function. Aleksandra Gigowska/Shutterstock

In recent weeks and months, there have been more studies(1) demonstrating the benefits of vitamin D against COVID-19. More than 200 doctors, scientists, and leading authorities have signed an open letter(2) calling for increased use of vitamin D in the fight against COVID-19.

“Research shows low vitamin D levels almost certainly promote COVID-19 infections, hospitalizations, and deaths. Given its safety, we call for immediate widespread increased vitamin D intakes,” the letter states.