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GrassrootsHealth | Vitamin D Action

A Mistake Was Made; The RDA For Vitamin D Should Be 10-15 Times Higher Than It Is.

Recent evidence demonstrates a drastic statistical error made during the calculation of the Recommended Daily Allowance (RDA) for vitamin D.  Read more>

Sign the petition for its correction here 

Vitamin D Serum Levels Not Associated with Kidney Stones

Published by GrassrootsHealth.  Read more here> 

Vitamin D Increases Breast Cancer Patient Survival

Breast cancer patients with high levels of vitamin D in their blood are twice as likely to survive the disease as women with low levels of this nutrient.  Read the Press Release from UCSD here>

Does Vitamin D Prevent Cancer VideoDoes Vitamin D Prevent Cancer? 

Interview with Dr. Cedric F. Garland, UCSD


Diabetes Prevention with Vitamin D?

Interview with Dr. Cedric F. Garland, UCSD

Watch the video interview, or read more about diabetes prevention with vitamin D.


Featured on Mercola:

Vitamin D Controversy: Should You Continue Using D?

The Who, Why and When of Vitamin D Screening 


Latest Vitamin D Research

Maternal 25-Hydroxyvitamin D and Preterm Birth in Twin Gestations. Bodnar, LM et al.  Late second-trimester maternal 25-hydroxyvitamin D concentration of 75 nmol/L or more was associated with a 60% reduction of preterm birth in this cohort of twin pregnancies. LEVEL OF EVIDENCE:: II. 

Dr. Heaney's Blog:

A series of brief commentaries on vitamin D and other nutritional issues. Check it out! 

Receive D*action News & Updates:

Sign up for the GrassrootsHealth D*action Newsletter; it's free!  You can also unsubscribe at any time. 

Carole Baggerly Interview/Breast Cancer

View the entire interview

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Breast Cancer Prevention Study with Vitamin D launched by GrassrootsHealth
Enrollment Open for Community Groups.
Learn more about this study

GrassrootsHealth New Research Publication says

Higher vitamin D intake needed
to reach recommended serum levels.

Learn more about this study

Please also listen to these interviews with Dr. Heaney & Dr. Garland, co-authors of this paper.

Dr. Robert P. Heaney Interview

Anticancer Journal Article

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Dr. Cedric Garland

Anticancer Journal Article

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Video Resource Center

Check out our new Video Resource Center
Quick information for your health.

Press Release for Pregnant Women

April 30, 2010
Researchers recommend pregnant women take 4,000 IU vitamin D a day.
Full Story

A Consortium of Scientists, Institutions and Individuals Committed to Solving the Worldwide Vitamin D Deficiency Epidemic. VIEW

Join Today! Get your vitamin D level tested and help spread the word!

GrassrootsHealth has launched a worldwide public health campaign to solve the vitamin D deficiency epidemic in a year through a focus on testing and education with all individuals spreading the word.

Everyone is invited to join in this campaign! Join D*action and test two times per year during a 5 year program to demonstrate the public health impact of this nutrient.

$60 and a quick health survey allows everyone to help sponsor the ‘open arm’ of this 5 year study. (The fee is $65 for a one-time sponsorship.) (There are many clinics participating and their fees may vary due to services offered by the clinic.)

  • get a vitamin D blood spot test kit to be used at home (except in the state of New York)
  • have the results sent directly to them
  • take action to adjust their own levels to get to the desired ranges with whatever help is needed from their healthcare practitioners.

With only 100 people joining up today, and getting 2 friends to join in 2 weeks (and those 2 friends getting 2 more), by week 42, there could be 400,000,000 people who are vitamin D ‘replete’! (more than the United States population)

GrassrootsHealth Maintains
40-60 ng/ml Recommendation

Comments from
GrassrootsHealth Scientists

Bone health not maintained
at IOM's 20 ng/ml

Robert P. Heaney, M.D.,
Creighton University
Heike Bischoff-Ferrari and Walter Willett, Harvard School of Public Health
Susan E. Brown, Ph.D. Center for Better Bones


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

Don't know your current serum level? Order your home vitamin D test today

Serum Level Converter.

 25(OH)D Unit Level