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Latest Posts

What Are the Zinc Levels of GrassrootsHealth Participants? (Updated 2023)

An estimated two billion people world-wide are deficient in zinc, an element essential for immune health, central nervous system...

The Need for Higher Vitamin D Doses Demonstrated in Randomized Trial

Congratulations and Thanks to the Target-D Trial for demonstrating the importance of dosing based on serum level! Key Points...

Vitamin D Safety and Adverse Effects – When Should Caution Be Advised?

Prof. Sunil Wimalawansa elaborates on the safety of vitamin D and avoiding adverse effects, including types of individuals who...

The Top Vitamin D Myths: What’s Fact and What’s Not?

Learn more about several vitamin D misconceptions; these posts answer a majority of the questions we receive on a...

Scientists’ Call to D*action for Public Health

48 vitamin D researchers agree that vitamin D levels of 40-60 ng/ml (100-150 nmol/L) are safe, inexpensive and lead...

Are You Vitamin D Deficient?

There's no single supplement amount that works for everyone. Testing is important to see if you're within the recommended...

837 KB

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

Download, read and share this educational booklet with a practical guide on how anyone can achieve and maintain their...

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Spotlight

Vitamin D Deficiency Risk Assessment Quiz

What is your risk of having a vitamin D level below recommended? The Vitamin D Deficiency Risk Assessment Quiz...

Vitamin D*calculator™

Calculate the estimated additional intake required to reach your target vitamin D serum level (scientist panel recommendation of 40-60ng/ml).

D*action — Moving Vitamin D and other Nutrient Research Into Practice

Vitamin D projects are currently running globally, for pregnancy, and for breast cancer...

October 27, 2022 0

Vitamin D helps you live longer! World Vitamin D Day – November 2nd

TORONTO, ON (October 25, 2022) – Your personal health and that of your family are the most important things...

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Encinitas, CA 92024

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Tools

D*Calculator
Calculate your estimated additional D intake to reach your target vitamin D serum level. (40-60 ng/ml recommended by our scientist panel).

Serum Level Converter
Convert blood serum level 25(OH)D Unit between ng/mL and nmol/L.

Omega-3 Index Calculator
Calculate your estimated EPA+DHA (Fish Oil) intake to reach your target Omega-3 Index. (8-12% recommended).

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