Published on November 4, 2022

PLUS: Save 10% on home test kits this November for Vitamin D Awareness Month, and earn an extra $5 off when completing our new quiz

Many amazing resources have been created since GrassrootsHealth began in 2007, including visuals, charts, and handouts educating about vitamin D and available for anyone to download and share. We want to know – what are your favorites? What do you find most useful and why?

Our audience is made up of a wide variety of individuals, from doctors and health care providers to public health officials and the general population. Some resources might call more to others, depending on previous education, occupation, and the intention of use. Please take the following survey to let us know who you are and what you have found most useful… and, if you have suggestions for something new! Your responses will help us as we create the very best Vitamin D Toolkit for you to use when learning about vitamin D or when educating others.

Refer to the list of our top 20 resources, descriptions, and images below as you cast your vote!

Place Your Vote Here
Download This Resource List with QR Codes to Print


Vote On These GrassrootsHealth Vitamin D Resources

(#1) Newest e-Tool: The Vitamin D Deficiency Risk Assessment Quiz

To help educate everyone about their unique, individual risk factors for vitamin D deficiency and to highlight when testing may be of extra importance, we have created The Vitamin D Deficiency Risk Assessment Quiz (Beta), a short set of questions about an individual’s supplemental vitamin D intake, UVB exposure, and low exposure indicators to assess risk level. Scoring is intended to determine if an individual has a low, moderate, or high risk of having a vitamin D level below 40 ng/ml (100 nmol/L). This tool can also help motivate individuals to take their supplements or take other steps to reach and maintain healthy vitamin D levels!

To help further validation of this e-Tool, individuals who complete the quiz will receive a coupon for $5 off their next kit order, and will be encouraged to complete their questionnaire and vitamin D test within a month of completing the quiz. This coupon can be combined with any other offer.

Take the Quiz Now for Your $5 Coupon

(#2) Most Popular e-Tool: The Vitamin D*calculator

Use the Vitamin D*calculator to calculate the estimated Vitamin D intake needed to reach your target vitamin D serum level (40-60 ng/ml recommended by our scientist panel). The calculator is best used when a current/starting vitamin D level is known.

Go to the Vitamin D*calculator™

Key Educational Pieces

(#3) Scientists’ Call to D*action

A Scientists’ Call to Action issued to alert the public to the importance to having vitamin D serum levels between 40 and 60 ng/ml (100-150 nmol/L) to prevent diseases.

(#4) Disease Incidence Prevention Chart (General)

Summarizes 15 peer-reviewed, published papers on vitamin D and certain conditions, with percentage reductions based on vitamin D levels.


(#5) Disease Incidence Prevention Chart (Pregnancy & Children)

Displays results from multiple studies on the association between vitamin D level and various conditions in pregnancy and early childhood.


(#6) KNOW “D” NUMBER Patient and Provider Guide to Understanding Vitamin D, Testing & Results Booklet

An IRB approved guide for individuals and health care providers to increase understanding of vitamin D.


(#7) Moving Research into Practice Charts Booklet

A booklet of charts based on data collected in the GrassrootsHealth study, as well as several studies by our scientists and other vitamin D researchers.


(#8) How Much Vitamin D Do You Need? Infographic

Everyone’s vitamin D requirements differ based on several factors; this one-page infographic provides steps to help determine that amount.


(#9) Cycle of Best Practices for Addressing Vitamin D Deficiency

A public health model for addressing vitamin D deficiency. Now available in Spanish!


(#10) Everyone Responds Differently to Vitamin D Infographic

A summary of factors that can affect how much vitamin D the body may actually be getting on a daily basis.


(#11) Interactive PDF: How Vitamin D Deficiency Affects Every Part of the Body

A diagram to learn more about how vitamin D affects each of the body systems, with links to additional details.


(#12) Vitamin D Deficiency Iceberg

Graphical illustration of how vitamin D deficiency is associated with increased risk of disease through all life stages; rickets is just the tip of the vitamin D deficiency iceberg.


(#13) By-Topic Infographic Posters

Learn why measuring your vitamin d and omega-3 levels is important, with our newest infographics! These are great for sharing research based evidence about the benefits of vitamin D, as well as omega-3s, and other nutrients for our health, with topics including Cognition, Focus & Attention, Mood Support, Fertility & Pregnancy, Blood Pressure, Muscle Health & Fitness, and Breast Cancer.

See All Infographic Posters Here

Tri-fold Brochures

(#14) Vitamin D FAQ Brochure

The most commonly asked questions and answers about vitamin D in general.


(#15) Vitamin D for Pregnancy, Breastfeeding & Babies

Frequently asked questions about vitamin D for pregnancy, breastfeeding, babies and children.


(#16) Vitamin D & Breast Cancer Prevention

A brochure summarizing studies on vitamin D and breast cancer, demonstrating a 50-80% lower risk of diagnosis for women with higher vitamin D levels.


(#17) Know D*Number Brochure

A condensed guide to understanding vitamin D, testing, and results, with vitamin D FAQs, as well as steps for reaching and maintaining desired target vitamin D levels.


(#18) Cancer Prevention with Vitamin D

A summary of research evidence showing the roles of vitamin D in cancer prevention and incidence.


(#19) Type 1 Diabetes Prevention with Vitamin D

Frequently asked questions and answers about type 1 diabetes, prevention with vitamin D and omega-3 fatty acids, and the T1D Prevention Project.


eBook for Purchase

(#20) COVID-19 & Vitamin D Research Summary eBook

Multiple studies have demonstrated a reduced risk of COVID-19 infection, severity, and death with increased vitamin D levels. The eBook, Vitamin D & COVID-19, A Summary of Published Research, is a condensed and concise compilation of much of this research in an easy-to-read and print PDF. Your purchase helps to further public knowledge and education of this invaluable research!

Purchase the Vitamin D & COVID-19 eBook

Place Your Vote Here!

Measure Your Status of Vitamin D and Other Nutrients (Save 10% with Code DMonth22)

Having and maintaining healthy levels of vitamin D and other nutrients can help improve 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. Add hs-CRP to measure your level of inflammation as well.  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.

How Can You Use this Information for YOUR Health?

Having and maintaining healthy vitamin D and other nutrient levels can help improve your health now and for your future. Measuring is the only way to make sure you are getting enough!

STEP 1 Order your at-home blood spot test kit to measure vitamin D and other nutrients of concern to you, such as omega-3s, magnesium, essential and toxic elements (zinc, copper, selenium, lead, cadmium, mercury); include hsCRP as a marker of inflammation or HbA1c for blood sugar health

STEP 2 Answer the online questionnaire as part of the GrassrootsHealth study

STEP 3 Using our educational materials and tools (such as our dose calculators), assess your results to determine if you are in your desired target range or if actions should be taken to get there

STEP 4 After 3-6 months of implementing your changes, re-test to see if you have achieved your target level(s)

Enroll in D*action and Build Your Custom Test Kit!