Question: Is it important to get vitamin D sulfate specifically from the sun? Short Answer: It is important to get morning outdoor sunlight as close to every day as possible for your circadian rhythm, and to get some exposure to unprotected sunlight during the day when UV is available, but at doses less than needed to cause …
Question: Why would vitamin D, vitamin K2, and calcium give me brain fog? Short Answer: Most likely by decreasing serum phosphorus. The solution is to balance these nutrients with vitamin A and phosphorus. This episode was cut from the original Q&A session that you can find here. DISCLAIMER: I have a PhD in Nutritional Sciences and my expertise …
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 …
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 …
Note: You can watch my presentation based on this research from the 2021 Ancestral Health Symposium here, watch a much longer video that covers missing slides and answers questions about the talk here, download a PDF of my slides here, and see a short list of minor corrections to the presentation in note 1. In a …
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 …
30 Pages on Vitamin D Straight to Your Inbox
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 …
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 …
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 …