Published on April 23, 2021

Video Friday: GrassrootsHealth panel scientist Dr. Adrian Gombart to present on “Why a Healthy Immune System Needs Vitamin D”

It’s Video Friday! Today we are sharing an upcoming webinar opportunity with you titled Why a Healthy Immune System Needs Vitamin D, presented by Dr. Adrian Gombart, the resident vitamin D expert at the Linus Pauling Institute. The webinar will take place on Tuesday, May 4, 2021 at 4pm Pacific Time.

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Webinar Description

Vitamin D is often associated with healthy bones, but in recent years scientists have highlighted its role in a proper immune response. In the last two decades, some remarkable discoveries have been made concerning the roles of vitamin D in the immune system. Unfortunately, despite widespread testing and supplementation programs, a lot of people around the world suffer from the effects of low vitamin D status – especially in the winter. At this online event, Dr. Adrian Gombart will discuss the roles of vitamin D in the immune system and how vital it is to maintain your vitamin D levels. Important information for flu seasons, the COVID era, and beyond.

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About Dr. Gombart

Adrian “Fritz” Gombart, PhD, is a Principal Investigator for the Linus Pauling Institute and a Professor of Biochemistry and Biophysics at Oregon State University. He received his PhD in Microbiology at the University of Washington in Seattle, WA and completed his postdoctoral research in Hematology/Oncology at Cedars-Sinai Medical Center and the David Geffen School of Medicine at UCLA in Los Angeles, CA. His research funded by the NIAID, NIGMS and NCCIH at the National Institutes of Health focuses on understanding the impact of vitamin D and other micronutrients on the immune system. His goal is to identify mechanisms of action through which vitamin D functions in regulating immunity and use this knowledge to develop approaches to prevent and treat disease.

We are proud to have Dr. Gombart as a member of the GrassrootsHealth International Scientist Panel.

Carole Baggerly Interviews Dr. Gombart (2013)

Below is an interview on vitamin D and the immune system conducted by Carole Baggerly during the Linus Pauling Institute Conference in 2013. In this interview, Dr. Gombart discusses findings from his own work on specific actions of vitamin D for immune functioning, as well as an overview of vitamin D for health as we age.

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Don’t miss the opportunity to watch the upcoming webinar for the latest findings on vitamin D and the immune system with Dr. Gombart!

Register Now!

Are You Getting Enough Vitamin D for Your Health?

With almost 90% of the general population having vitamin D levels below the recommended 40-60 ng/ml (100-150 nmol/L), it is obvious that most people need more vitamin D. While most of us cannot achieve a vitamin D level of 40-60 ng/ml from sun alone, either due to our lifestyle, where we live, or other circumstances, we can certainly reach those levels with the right amount of supplementation.

Below is a guide for how much you might need, and who may need more. Your levels can be tested safely at home – order your home test kit today.

Click to Enlarge & Print

By joining the GrassrootsHealth projects, you are not only contributing valuable information to our study, but you are also gaining knowledge about how you could improve your own health through measuring and tracking your nutrient status, and educating yourself on how to improve it. Do you know what your status of vitamin D, omega-3s, and other essential nutrients is? Could your levels be improved? Test now to find out!

We now have a NEW GIFTING SERVICE that allows you to quickly send ‘Gift Cards’ to friends, family and coworkers who you consider might need immediate access to testing, and to Claim the Joy of Your Health TODAY. Give the gift today!

What does the Research Say about Vitamin D & COVID-19?

It’s TIME to start saving lives! If you can help PREVENT the majority of the death, it’s time! What’s it costing you/us not to take action NOW?

There is much published research that supports a clear link between vitamin D and COVID-19 showing that higher vitamin D levels are related to:

a decreased risk of testing positive for COVID-19

increased viral SARS-CoV-2 RNA clearance

better clinical outcomes among patients with COVID-19

less severe COVID-19 disease

decreased risk of death due to COVID-19

Be sure to educate yourself on the benefits and importance of vitamin D for immune health, and take steps to ensure you and your loved ones are getting enough.

You can review all of the COVID-19 and immune health information we have shared on this page.

What Does it Take YOU to Get Your D to 40 ng/ml (100 nmol/L)?

Did you know your health could be greatly affected by making sure you have a vitamin D level of at least 40 ng/ml (100 nmol/L)? Help us help you.

STEP 1 - Do you know what your vitamin D level is? If not, be sure to test today to find out.

STEP 2 – Determine your target level. Are you at your target level? Experts recommend a level of at least 40-60 ng/ml (100-150 nmol/L).

STEP 3 – Need to boost your level? Use the D*calculator to see how much vitamin D it may take to reach your target. Opt for the Loading Dose for a quicker boost.

STEP 4 – Optimize how your body absorbs and utilizes vitamin D with co-nutrients and these simple steps.

STEP 5 – Re-Test! This is an important step to make sure you have reached your target level, and to ensure you are not taking too much! Re-testing after 3-4 months is recommended.

STEP 6 – Adjust, Repeat…

Give your immune system the nutrients it needs to support a healthy you and protect yourself from unnecessary diseases, especially COVID-19.


The first Randomized Controlled Trial on vitamin D and COVID-19 has shown a 96% lower risk of ICU admission for those receiving vitamin D (as 25(OH)D to quickly boost vitamin D blood levels) along with the standard treatment, compared to those receiving standard treatment alone.

These results support many previous observational studies showing a relationship between vitamin D levels and intake and COVID-19 severity.

Review the Latest Nutrient Research for COVID-19

GrassrootsHealth Nutrient Research Institute has launched the new Immune Boost project with the use of our myData-myAnswers nutrient health system that nearly 15,000 people are already using for their health. Specific markers that influence immune health are suggested for testing as part of this project including:

  • Vitamin D
  • Omega-3 Index
  • Essential elements magnesium, selenium, and zinc
  • hsCRP

Our goal is to demonstrate how one can use the Nutrient Research Model established by Dr. Robert Heaney to show the effect of vitamin D serum levels of at least 40 ng/ml (100 nmol/L) on risk reduction for all ethnicities in the population. Status and intake of other nutrients will also be analyzed for any type of relationship to immune status and symptom severity. Join the project today!

Please let us know if you're interested in helping sponsor this project.

CLICK HERE for updates and new information about the project.

Through GrassrootsHealth Nutrient Research Institute, you can also test your essential elements magnesium, copper, zinc and selenium, toxins such as lead, mercury and cadmium, as well as your omega-3 levels, inflammation levels and thyroid stimulating hormone (TSH) level. Find out your levels today! Log on to the test selection page (click the link below) to get your tests and see for yourself if your levels can be improved.

Make sure you track your results before and after, about every 6 months!

Click Here to Access the Test Page

How can I track my nutrient intake and levels over time?

To help you track your supplement use and nutrient levels, GrassrootsHealth has created the Personal Health Nutrient Decision System called

For each specific supplement, you can track what days you take it, how much, and many other details.  This will help you know your true supplemental intake and what patterns of use work for you to reach and maintain optimum nutrient levels. Check it out today!