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Top 5 Signs of Vitamin D Deficiency

This article was previously published January 1, 2019, and has been updated with new information. Vitamin D deficiency is incredibly common around the world, but many mistakenly believe they aren’t at risk because they consume vitamin D-fortified foods, such as milk. However, few foods have therapeutic levels of vitamin D naturally, and even fortified foods […]

Magnesium and K2 Optimize Your Vitamin D Supplementation

This article was previously published June 15, 2020, and has been updated with new information. Optimizing your vitamin D level is ideally done through sensible sun exposure. However, many simply are unable to obtain sufficient levels from the sun alone and need supplemental vitamin D. In this case, nutritional synergies become an important factor. According […]

More Than 80% of COVID Patients Are Vitamin D Deficient

This article was previously published November 9, 2020, and has been updated with new information. Aside from insulin resistance,1 vitamin D deficiency has emerged as a primary risk factor for severe COVID-19 infection and death. Higher vitamin D levels have even been shown to lower your risk of testing positive for the virus in the […]

Vitamin D Papers Top List of Most Popular Studies of the Year

Vitamin D Papers Top List of Most Popular Studies of the Year

October 31, 2020, I published a scientific review1 in the journal Nutrients, co-written with William Grant, Ph.D., and Dr. Carol Wagner, both of whom are part of the GrassrootsHealth expert vitamin D panel. This paper, “Evidence Regarding Vitamin D and Risk of COVID-19 and Its Severity” — which you can download and read for free […]

How to Fix the COVID-19 Crisis in 30 Days

How to Fix the COVID-19 Crisis in 30 Days

In a June 22, 2020, Orthomolecular Medicine News Service press release,1 Damien Downing, president of the British Society for Ecological Medicine, outlines how we could resolve the COVID-19 pandemic in 30 days for about $2 per person, simply by taking affirmative action to raise vitamin D levels. The downside or risk of doing this is […]

The Most Important Paper Dr. Mercola Has Ever Written

The Most Important Paper Dr. Mercola Has Ever Written

All things considered, vitamin D optimization is likely the easiest, least expensive and most beneficial strategy that anyone can do to minimize their risk of COVID-19 and other infections in the coming months. Health authorities are already warning of a second wave of COVID-19 in the fall, which means the time to start addressing your […]

Vitamin D Combats Viral Infections and Boosts Immune System

Vitamin D Combats Viral Infections and Boosts Immune System

In this interview, I interview three vitamin D experts about the importance of vitamin D for improving your immune function and resistance to viral infections of all kinds, including COVID-19. Bruce Hollis, Ph.D., with the Medical University of South Carolina, has researched vitamin D since the late 1970s. His research associate at the Medical University […]

Does Vitamin D Supplementation Prevent Cancer and Cardiovascular Disease?

Does Vitamin D Supplementation Prevent Cancer and Cardiovascular Disease?

The effectiveness of vitamin D supplementation has again been questioned with negative headlines1,2 trumpeting its failure to prevent cancer and cardiovascular disease. What most researchers and journalists fail to address, however, is the fact that: The “high dose” given in this trial was a mere 2,000 international units (IUs) a day, which is still only […]