Vitamin D may not be a cure for COVID, but studies have had very promising results.
And there’s essentially no risk of side effects at reasonable doses.
And it’s cheap.
And it’s widely available.
And a wide variety of people are likely to be low on vitamin D, including people living at higher latitudes, people with obesity, and people with darker skin tones.
What does the evidence say about vitamin D and COVID-19? | Examine.com