Published on December 29, 2021

Happy New Year! As we welcome 2022, let’s review the top hits from 2021

Now that the year 2021 is almost over, let’s take a look at the top 10 most popular blogs from this year. If you haven’t seen these yet, now is the time to read them and spread the word.

And, before the year is done, don’t forget that any kit purchase made now through the end of this year will include the new eBook Vitamin D & COVID-19: A Summary of Published Research for FREE (also free with a donation here).

Wishing you all a very Happy New Year’s to come!

NEW Loading Dose Vitamin D*Calculator!

Discover how much vitamin D may be necessary to help you achieve your target vitamin D level. The new D*calculator provides two options for increasing your vitamin D levels – a “Loading Dose” and a “Maintenance Dose” allowing users to choose how quickly they would like to achieve their desired levels.

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How Much Vitamin D Does a Mother Need to Pass It Onto Her Breastfeeding Infant?

It is well-known that most breastfeeding babies are not getting adequate vitamin D and if a mother were to bring this topic up during a baby’s well-visit, the pediatrician would most likely recommend a 400 IU/day infant drop. This will work for the baby, but NHANES data has found that only 2-19% of all babies are actually getting the prescribed daily amount of vitamin D. That leaves over 80% not getting the recommended amount of vitamin D. Is there another way?

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Is Your Vitamin D Level Too High?

We sometimes receive questions from participants about whether a vitamin D test result is too high if it came back higher than the recommended range of 40-60 ng/ml. In this blog we will explore what levels may be considered too high and what can be done if you want to reduce your levels. Are vitamin D levels between 60 and 100 ng/ml too high? Are vitamin D levels over 100 ng/ml too high? What is vitamin D toxicity, and what if a lower vitamin D level is desired?

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14 Signs of Vitamin D Deficiency

This blog features a video that discusses several signs someone may be experiencing if they have a vitamin D deficiency.

Vitamin D deficiency is a major health issue, with almost 90% of the population having levels below the scientists’ recommended 40-60 ng/ml (100-150 nmol/L) blood level.  Read More>

Dr. Coimbra’s Protocol for Multiple Sclerosis

Do you or someone you know have MS? Are you/they aware of the connection between vitamin D and MS? Dr. Coimbra has been able to suppress disease activity in about 95% of MS cases with variable (individually tailored) high daily doses of vitamin D. The doses are set according to the results of laboratory tests in order to compensate for that individual’s degree of genetic vitamin D resistance. This resistance seems to underlie the predisposition to (and maintenance of) autoimmune aggression.  Read More>

How to Time Your Vitamin D Testing with Changes in Supplementation

Participants often ask about details on how and when to change their vitamin D supplementation based on their vitamin D test results. “How much vitamin D should I take with a level of XX?”, “When should I test again to see if my new intake has increased my level enough?”, and “Should I wait to test until after I have changed my supplement intake?” are questions we frequently receive. This blog answers these questions and more.

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A Summary of Research on COVID-19, Vitamin D, Other Nutrients & Immune Health

We have shared and will continue to share a wealth of information on vitamin D and numerous other nutrients (such as omega-3s, vitamin C, magnesium and zinc) that are important for immune system function. Simply put, nutrient intake is a major and easily modifiable factor that may reduce the incidence of colds, flu and COVID-19. Here we present up-to-date scientific information in a format that is easy to access and understand to summarize the latest research on the topic.  Read More>

What type of magnesium are you taking?

There are many different forms or types of magnesium contained in nutritional supplements, topical creams, and oils. Each form consists of a magnesium molecule or ion attached to another molecule, which can affect the action and bioavailability of the magnesium itself. Included in this blog is a list of some common forms of magnesium found in supplements.

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How to Avoid a Rejected Blood Spot Sample

Did you know that your blood spot sample could be denied for testing if not done properly? It is especially important to provide a quality sample with multiple tests being performed from each blood spot sample.

We originally reviewed this topic back in March, and have decided to touch on it again due to the importance of providing a proper sample, especially with the new Elements Panel.  Read More>

The Vitamin D and Kidney Stones Myth

The myth addressed in this blog – that taking vitamin D causes kidney stones – is based on the interplay of vitamin D with another nutrient, calcium. However, not only has the idea has been debunked with the findings of several research studies, but the opposite seems to be true! If the fear of kidney stones is preventing you from taking vitamin D supplements, rest easy and take the supplements you may need to achieve a healthy vitamin D level.

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Start Your New Year Knowing Your Nutrient Status!

Having and maintaining healthy vitamin D levels and other nutrient levels can help improve your health now and for your future. Choose which to measure, such as your vitamin D, omega-3s, and essential minerals including magnesium and zinc, by creating your custom home test kit today. Take steps to improve the status of each of these measurements to benefit your overall health. You can also track your own intakes, symptoms and results to see what works best for YOU.

Enroll and test your levels today, learn what steps to take to improve your status of vitamin D (see below) and other nutrients and blood markers, and take action! By enrolling in the GrassrootsHealth projects, you are not only contributing valuable information to everyone, 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.

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!