This review was about testing supplementation of vitamin D, what you posted is mostly about correlation between serum levels and health outcomes, and those levels are largely about non-supplemented “natural” vitamin d.
The distinction is important because science has been trying to figure out whether vitamin d itself has the benefits, or if it is a marker for a larger salubrious process.
High-dose Vitamin D reduces disease activity in early multiple sclerosis onset (91 points, 15 days ago, 52 comments) https://news.ycombinator.com/item?id=43469661
Over 80% of Covid-19 patients in a hospital study have Vitamin D deficiency (654 points, 4 years ago, 363 comments) https://news.ycombinator.com/item?id=24912172
Adequate Vitamin D Levels Cuts Risk of Dying from Covid-19 in Half, Study Finds (372 points, 5 years ago, 211 comments) https://news.ycombinator.com/item?id=24607645