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Vitamin D supplements, testing, and interactions with the vaccine. | Masterjohn Q&A Files #293

Short Answer: Vaccination shouldn’t change the vitamin D requirement. Quarterly testing makes sense for someone who has never tested before or who wants to make sure they stay in range during COVID, but generally testing yearly around the mid-point of seasonality for you, once you know your variation, is plenty. Watch the video or listen …

Why would 5,000 IU vitamin D cause tooth sensitivity? | Masterjohn Q&A Files #284

Short Answer: While it is unclear, it could relate to vitamin K depletion, hypercalcemia, or compensation in acid-base balance. First and foremost, use the full testing algorithm in Testing Nutritional Status: The Ultimate Cheat Sheet (available at https://chrismasterjohnphd.com/cheatsheet) rather than just testing 25(OH)D to determine deficiency. Watch the video or listen to the podcast with …

How should someone balance a vitamin D of 80 ng/mL with other nutrients? | Masterjohn Q&A Files #188

Question: How should someone balance a vitamin D of 80 ng/mL with other nutrients? Let’s say the idea is to maintain someone on a lifelong level of 80 nanograms per milliliter. Maybe four times the first year, two times the second year, once the third year and then every few years thereafter, I would measure …

Vitamin D and COVID-19

Finally Confirmed! Vitamin D Nearly Abolishes ICU Risk in COVID-19

September 3, 2020 The first randomized controlled trial (RCT) of vitamin D in COVID-19 has just been published. The results are astounding: vitamin D nearly abolished the odds of requiring treatment in ICU. Although the number of deaths was too small to say for sure, vitamin D may actually abolish the risk of death from …

The Latest Vitamin D and COVID-19 Study

August 31, 2020 On August 14, I covered a Mendelian randomization study from the UK Biobank that found no association between genetics that impact vitamin D status and COVID-19. Mendelian randomization studies are thought to be one of the best “natural” substitutes for randomized controlled trials when trying to understand whether an association represents cause-and-effect …

Five New Vitamin D and COVID-19 Studies

August 14, 2020 Since I last wrote about vitamin D at the end of May, five new studies have been released on the topic. Can Genetics Shed Light on Whether the Association Is Causal? Yesterday, a Mendelian randomization study was released as a preprint* that, in the words of the authors, “did not show any …

Vitamin D Does Not Explain the Race/Ethnicity-COVID-19 Relationship

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. …

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 …