Its NOT unclear as the article says.
Vitamin D is a master hormone that affects and works on 29,000 genes in the human body.
Its so important we make it by exposure to sunlight. Because its used by so, so many processes in the body.
Since few of us get enough sunlight, my wife and I take 5,000 iu of Vitamin D3 and 50 mg Zinc daily as our Covid preventative. Seems to be effective. No shots.
Vitamin D is a master hormone that affects and works on 29,000 genes in the human body.
Its so important we make it by exposure to sunlight. Because its used by so, so many processes in the body.
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I get sunlight every day as I take a walk. Usually with my shirt off to get/manufacture D3.
But the older you get, you cannot trust getting D3 by sunlight only. Your D3 conversion process diminishes. So I take 10-20 thousand IU D3 daily. At this level K2 is a must and so is a magnesium supplement such as magnesium glycinate.
A year or so ago I saw some doctor talking about Covid, and health in general. IIRC he said there were 5 things essential to a healthy body.
1) Vitamin D
2) Vitamin D
3) Vitamin D
4) Vitamin D
5) Exercise
I’m guessing on the exercise one - maybe it was diet??
I carefully read the material at the top of this post, and also the link for the article quoted. I could not find your sentance about 29,000 genes affected. The figure I have encountered on several occasions is that D affects about 10% of our genes, which is about 2,000 genes Plenty enough to make evaluating our personal need for enough Vitamin D to influence all the genes that need it.