Vitamin D and COVID-19: Taking It Won’t Hurt, But Probably Doesn’t Help! .

Interest in vitamin D surged early in the pandemic as researchers explored whether its known benefits in respiratory infections might extend to COVID-19. Prior trials in non-COVID settings suggested modest protection against acute respiratory infections, but no randomized evidence yet exists for COVID-19 itself. Observational findings remain inconsistent, with some studies showing lower vitamin D levels in infected or hospitalized patients and others finding no association at all. Major clinical guidelines have taken a cautious stance, offering no recommendations for vitamin D in COVID-19 prevention or treatment. Overall, current evidence remains too limited and mixed to draw firm conclusions.