Vitamin D: Cheer Up, Spread Positivity!!

Vitamin D has been found to be the single most important distinction between those who remain healthy and those who get sick.

Those who have technical background in the medical, biology etc., areas can study this research paper, for example:
https://www.mdpi.com/2072-6643/13/10/3596

To briefly quote the paper:
"Mortality Rate Close to Zero Could Theoretically Be Achieved at 50 ng/mL 25(OH)D3"

But otherwise, there are dozens of such papers @ PubMed.

All those who have sufficient Vitamin D need to maintain that level. And, those who are running low on Vitamin D need to get under the SUN for at least 40mins in a day. Either walk or stand in the Sun. Best times are between Sunrise to Sunrise+2hrs, and in the evening between Sunset-2hrs to Sunset. more  

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Thought-models continue to come up as advice. No one knows for sure what is right and what is wrong. For example, doctors now prescribe Vitamin D to be taken in doses of 2000 units every day rather than 60000 units per month. Keeps us guessing, right? more  
Yes. It is one of the reason. The other is living in crowded localities in cities. more  
Should we not get enough sun light naturally due to practical issues, then we have to supplement it by medication to maintain the level of vitamin D which is the case with every other deficiency. more  
There is no solid evidence that vitamin supplements work. Please check. Only correct way is to bask in the Sun and exercise. [For aged persons, exercise may just be walking.] more  
There are also factors that play a role in effective absorption by the skin: - the time peirod when UV Brays are emitted- mid day, for the skin to absorb. - the colour of the skin, darker skinned ones where more Melanin pigment is there in the skin - melanis protects the skin from sunlight, so the skin of such will take more time for exposure to get the same quantity of uv Rays absorbed. - the back of the bodyabsorbs more than other parts. - minimal clothiing for best exposure and absorption.Even the clothing lighter than darker for best results. So remember the time, exposure of bosy directly,Clothing, and colour of the skin all play an important part in the effective absorption of Vit.D. more  
They Dark skinned will also get vit D on exposure to UV B -rays. But as Melanin pigment in the dak skinned acts like sunscreen will have to spend more time than the light skinned ones to get a specific quantity of D. more  
So, Africans don't get Vit D? more  
Conclusions from the Research Paper: 1. The datasets provide strong evidence that low D3 is a predictor rather than just a side effect of the infection. 2. Despite ongoing vaccinations, we recommend raising serum 25(OH)D levels to above 50 ng/mL to prevent or mitigate new outbreaks due to escape mutations or decreasing antibody activity. more  
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