The US Preventative Services Task Force has recently reviewed the vitamin D literatue, it is summarized here: https://www.uspreventiveservicestaskforce.org/usp

The US Preventative Services Task Force has recently reviewed the vitamin D literatue, it is summarized here: https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/vitamin-d-deficiency-screening https://www.uspreventiveservicestaskforce.org/uspstf/recomme... Primary care is largely concerned with preventative care. It's not that we don't want to help, it's just that in many ways we are impotent. We generally do not change practice based on single studies. But since this post is about a single study, I'll share a recent RCT in The Lancet which showed no change in mortality and signals of increased cancer with vitamin D supplementation: https://www.thelancet.com/journals/landia/article/PIIS2213-8587(21)00345-4/fulltext https://www.thelancet.com/journals/landia/article/PIIS2213-8... .