Why has vitamin D still not been added to US health recommendations for Covid-19?

This is not medical advice.

This article is mostly a link to this study. The information is best relayed by the authors. This study was published by the US National Institute of Health.

https://pubmed.ncbi.nlm.nih.gov/36678627/

We can get some of our Vitamin D needs from the sun. We typically do not get enough during the winter months, coinciding with increased illness, as we are indoors.

Some of these studies suggesting a link between Vitamin D deficiency and Covid-19 mortality date back to 2021. Why is it that we never hear about these studies?

Protective Effect of Vitamin D Supplementation on COVID-19-Related Intensive Care Hospitalization and Mortality: Definitive Evidence from Meta-Analysis and Trial Sequential Analysis