Here is a link to the Weill Center Covid-19 FAQ I mentioned
Here is a link to the research referenced in the title to this article
D’Avolio et al at University of Turin wrote “On the basis of this
preliminary observation, vitamin D supplementation might be a useful measure to reduce the risk of infection. Randomized controlled trials and large population studies should be conducted to evaluate these recommendations and to confirm our preliminary observation.”
With permission I am quoting professor Paul Bergner who interpreted the data this way “This could save a life. In Italy they measured the serum storage form of vitamin D in patients with positive vs negative PCR tests for the virus. The median 25D3 for those with negative for COVID was 24.6 ng/mL. This population had either been exposed or had symptoms that warranted a test. The median 25D3 for those with a positive COVID test was 11/1 ng/mL. The differences were highly statistically significant (p=.004). The differences were similar for those over age 70. This older group, both positive and negative, has more pre-esisting conditions than younger people, but even in this group with known risk factors, Covid-negative patients averaged 23.1 ng/ mL 25D3, while positive patients averaged 9.3. For reference, standard normal vitamin D level is about 30ng/mL, “insufficiency” is 20-30 ng/mL, and deficiency is below 20 ng/mL. Severe deficiency is below 12 ng/mL. In other words the average 25D3 levels in patients positive for COVID was severely deficient, and the average for those with negative test were “insufficient” but not deficient.
There are several lessons in this trial for optimal levels. First, having normal levels of 25D3 does not immunize someone from the COVID infection. 25% of those with a positive COVID test had “sufficient” or normal levels, with a high of 38 ng/mL, well into the current normal range. But it may be of interest that vitamin D experts have been arguing for a normal level of vitamin 25D3 to be 40 ng/mL. If this were the case then –all– the individuals positive for COVID had levels below 40 ng/mL.
Note that this measured being infected with COVID, we also have some evidence that vitamin D levels prevent those infected from developing severe disease, which this study did not test.”
