Does Supplemental Vitamin D Help Prevent Covid-19?

The video discusses the role of vitamin D in COVID-19, highlighting various studies with conflicting results. While some research suggests a link between low vitamin D levels and COVID-19, others find no correlation. The video emphasizes the limitations of observational studies and the need for randomized controlled trials. It also discusses the potential role of vitamin D in viral infections and the debate over supplementation, cautioning against relying on supplements as a COVID-19 cure.

What does the speaker suggest about the general population's vitamin D levels?

What concerns does the speaker raise about the belief in vitamin D as a protective measure against COVID-19?