While I was out, a peer-reviewed paper was published in the journal, Diabetes and Metabolic Syndrome: Clinical Research & Reviews that strongly challenges the idea that vitamin D status explains the relationship between race and ethnicity and COVID-19 risk, and adds to the growing data suggesting the relationship between vitamin D and infection risk is weak. …
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The First Vitamin D Study With Pre-Infection Levels Weakens the Association
Yesterday the very first COVID-19 study using pre-infection vitamin D status was released as a preprint.* Using data from the electronic health records of patients treated at University of Chicago Medicine, of the 4,314 people who were tested for COVID-19, 499 had their vitamin D status measured in the year before the COVID-19 test, excluding …
Vitamin D: The First Study on COVID-19 Infection Risk
Today, the first study on the association between vitamin D status and infection risk was published in fully peer-reviewed and final form in the journal Nutrients (a journal I published part of my doctoral research in). Background to the Issue Up to this point, there have been four studies published as preprints associating vitamin D status with …
Two New Vitamin D Studies
Two new preprints* on vitamin D were released on May 5, and I analyze them in this update. Background So far I have covered vitamin D in three issues of this newsletter: My Response to Rhonda Patrick on Vitamin D and COVID-19 Update on Vitamin D and COVID-19 Using the First Observational Study Released The …
The Second Study on Vitamin D and COVID-19 Is Now Out
The first study on vitamin D and COVID-19 was released as a preprint* on April 23, and a second study was released as a preprint on April 26. Here’s what we can learn from the second study. The first study, which I reported on a few days ago, focused on disease severity, while the second …
Update on Vitamin D and COVID-19 Using the First Observational Study Released
Today I was made aware of a preprint* that was most recently revised yesterday with specific data on vitamin D status. This is the first observational study that has, to my knowledge, addressed how vitamin D levels correlate with COVID-19 severity. A researcher from the Philippines used the data from three South Asian hospitals to …
My Response to Rhonda Patrick on Vitamin D and COVID-19
On September 13, 2020, I made an important update to my position, which is included at the end of the article. You can click through to it directly using this link. Yesterday, Dr. Rhonda Patrick, PhD, of Found My Fitness released an email to her list with the subject “Vitamin D may reduce susceptibility to …
Would a seasonally low vitamin D intake and high calcium intake cause soft tissue calcification? | Masterjohn Q&A Files #105
Question: Would a seasonally low vitamin D intake and high calcium intake cause soft tissue calcification? Chris: The end of this question is would the calcium simply be excreted due to the low vitamin D levels. Your vitamin D level being low, the first thing that’s going to do and the major thing that’s going …
What if my vitamin D is normal, but my PTH is high?
Analia Camarasa asked this question on Facebook: Ever since you’ve mentioned PTH on your podcast we’ve been measuring it in the office. It’s nice to see that when patients come in on high doses of D supplementation their PTH is maximally suppressed, as it should be. I wish you could talk about the outliers briefly, …
How to Tell the Difference Between Vitamin D and Calcium Deficiencies
Vitamin D deficiency and calcium deficiency look very similar, and poorly interpreted blood tests can easily mislead us into taking the wrong supplements. Here’s how to tell them apart. How to watch it: Watch it on Facebook. Watch it on YouTube. How to share it and show it love: Share it on Facebook. Give it …