[david_shi]

I didn't say researchers, I said in a medical context. If you do a search on pubmed or Google Scholar, you can find a lot of research on how vitamin D supplementation proved beneficial for patients in different contexts.

Also, I found your reply really jarring. Perhaps it's the immediate ad-hominem attack, but I just wanted to note that for your reference, it really didn't motivate me to want to engage any further with you.

[jijijijij]

Good thing I also mentioned doctors, who are, of course, applying the concluded result of research. But maybe you are talking about another "medical context".

I threw your "vitamin D supplementation proved beneficial" into Google and this Nature review article on vitamin D supplementation was the first result:

* https://www.nature.com/articles/s41574-021-00593-z

Here is some additional reading you may find interesting:

* https://en.wikipedia.org/wiki/Ad_hominem