”…participants did not significantly differ between the vitamin D3 (n = 863) and placebo (n = 884) groups [cumulative incidences, 0.28 compared with 0.29; odds ratio (OR), 0.97; 95% confidence interval (CI): 0.75, 1.24]. Similar nonsignificant results were observed for the prespecified secondary treatment and prevention outcomes, though per-protocol analyses showed a nonsignificant trend toward benefit of vitamin D3 on the prevalence of long COVID at 8 wk (OR, 0.78; 95% CI: 0.59, 1.03).“

Nothing to see here, but in general it is a good idea to publish non-results and should be done on a regular basis.

I take 10k-50k IU vitamin D3 every day and haven't been sick in years (knock on wood). Not saying that vitamin D3 is protecting me, but just saying...

Might be worth checking your blood level. $17.46 to do so at home seems reasonable.

https://altruan.com/products/all-test-vitamin-d-test-kit-rap...

The test will probably be useless, it will only show that op has enough vitamin D in their blood

>... it will only show that op has enough vitamin D in their blood

How can you know the result if you haven't tested?

I can’t obviously. But if they don’t have enough, despite massive overdosing for years, that would be very surprising. (The test only shows one of three possible outcomes. It is not a quantitative procedure.)

Concur: that would be surprising. I was more focused on the possibility of having a dangerously high blood level which is fraught with negative sequelae.

This test — among many others — offer quantitative results at home:

https://empowerdxlab.com/products/product/VITD?gad_source=1&...

Pretty expensive though. Lab costs in Germany are <20 € for a quantitative test and the cost of the physician for taking the sample is usually covered by insurance.

Obviously I do that. Also take appropriate amounts of K2.

>Obviously I do that

It wasn't obvious to me.

Wow that is a lot. 4,000 I.U. is the upper limit according to NIH — https://ods.od.nih.gov/factsheets/VitaminD-Consumer/#:~:text...