Maintain your Vitamin D level
between 100 – 150 nmol/L
Vitamin D Health Benefits
Natural Levels of Vitamin D
Key Resources


Tribune Opinion: We don’t care what it’s called, but we favor the return of recess
Dec 18, 2014

Regardless of what Greeley-Evans School District 6 officials call it, we’re glad to see recess come back to elementary school playgrounds.

The fact that officials have chosen to call it “Vitamin D Time,” and not recess, says a lot about how things have changed in our schools.

full story . . .
The Dangers of Winter Darkness: Weak Bones, Depression and Heart Trouble
Dec 16, 2014

Long periods without sunshine can play a role in a surprising variety of physical and mental disorders
The year's darkest day is drawing near. December 21 marks the winter solstice in the Northern Hemisphere, the shortest day and longest night of 2014. Thanks to artificial illumination, winter's lack of sunlight doesn't change our lifestyles quite as much as it did in the past. But our bodies definitely take notice—scientists are discovering that prolonged darkness can play a role in disorders from depression to diabetes. The consensus seems to be that sunlight is essential to humans, provided we can get the right dose on a regular basis. 


full story . . .
Vitamin D Experts Speak Out on Sunshine
Dec 16, 2014

GrassrootsHealth asked some of the worlds leading experts to answer questions about "The Sunshine Vitamin" and other benefits of UV light.

Encinitas, CA (PRWEB) December 16, 2014

GrassrootsHealth (GRH) released a new video featuring some of the world’s leading vitamin D experts answering questions about ‘The Sunshine Vitamin’ and discussing the benefits of UV light. “It is hoped that this video will reduce some of the confusion about sunshine and vitamin D and help provide a balanced message to the public,” said Carole Baggerly, Executive Director of GrassrootsHealth.

There are two conflicting views on sun exposure. On the one side are dermatologists, skin cancer organizations and public health groups who have been advising the public to stay out of the midday sun, or to use sunscreen, daily, to reduce the risk of skin cancer. On the other side are vitamin D advocates, scientists and doctors who believe that sensible, non-burning sun exposure helps you achieve adequate vitamin D levels, which reduces your risk of a number of serious diseases without increasing your risk of skin cancer.

full story . . .
"D" is for Debacle: The Crucial Story of 25(OH)D - Video
Dec 15, 2014

Well I finally got around to this; as I compiled the material in the latter weeks, I was again struck by the absurdity of the current approach to the problem.  Hopefully you will agree, and also enjoy this feature-length scientific journey - from our evolutionary beginnings, through to our current reality of chronic disease prevalence. The latter I believe is addressable in no small part by properly tackling.....the D Debacle.

full story . . .
‘Hype and hope but also a dearth of evidence’ for vitamin D as an IBD therapy: Review
Dec 15, 2014

Vitamin D may modify the immune response in people with inflammatory bowel disease (IBD), according to a review of evidence for vitamin D as a novel therapy for the condition. 

full story . . .
Association between vitamin D deficiency and mortality in critically ill adult patients: a meta-analysis of cohort studies
Dec 15, 2014

Results: Seven cohort studies with a total of 4,204 participants including 1,679 cases of vitamin D deficiency were included in this meta-analysis. Vitamin D deficiency was significantly associated with an increased hospital mortality (OR 1.76; 95% CI, 1.38 to 2.24; P <0.001), with very low heterogeneity (I 2?=?2.3%; P =0.402).

The finding of increased hospital mortality in critically ill adult patients was consistently found in every stratum of our subgroup analyses.

Conclusions: This meta-analysis suggests that vitamin D deficiency is associated with increased incidence of hospital mortality in critically ill adult patients.

full story . . .
Vitamin D for Public Health
Dec 09, 2014        8:00 am

Integrating Sunshine, Supplements and Measurement for Optimal Health

This seminar, presented by UC San Diego School of Medicine and GrassrootsHealth, has been developed as an educational opportunity to present and discuss the science of vitamin D and sunshine. The objective of the meeting is to leave with an implementation plan for your group – using vitamin D and sunshine to optimize health.

We’re looking forward to seeing you there!

Cedric F. Garland, Dr. P.H.                                          Carole Baggerly
University of California, San Diego                             Director, GrassrootsHealth

event details
18th Vitamin D Workshop April 21-24, 2015
Apr 21, 2015        8:00 am

On behalf of the Workshop Executive Committee, you are

cordially invited to attend the 18th Vitamin D Workshop in

Delft, the Netherlands, April 21-24, 2015. The Vitamin D

Workshop features overviews and original reports on basic,

epidemiological and clinical research, oral as well as poster


event details

Susan Rex Ryan
Defend Your Life

Defend Your Life has three main sections. The first addresses the fundamentals of vitamin D3 and its awesome benefits as well as minimal risk. The second highlights select diseases and conditions about which vitamin D3 may offer protection. The third includes the author's personal vitamin D3 story, including her theory about adequate vitamin D3 levels and how you can 'Defend Your Life'.

Reading this book will help you understand how adequate amounts of vitamin D3 are essential to enhancing your quality of life.

Ian Wishart
Vitamin D: Is This the Miracle Vitamin?

In this compelling new book,award-winning investigative journalist and bestselling author Ian Wishart brings together the most up to date science on vitamin D and how it could well save your life. Cancer? Up to a 77% reduction in risk of developing it if you take this vitamin. Heart disease? The same kind of reduction. Did you know that autism, mental illness and multiple sclerosis all appear to be caused by a lack of vitamin D during pregnancy?

The lives of every single person, including you, will be affected by the information in this book. With more than 300 scientific trials and studies cited, this book is a reference guide not just for the general reader but for medical professionals alike.

 more books...


Building consensus on optimal vitamin D levels in Canada

Key disease organizations support effort to curb vitamin D deficiency

TORONTO, Ont. (November 21, 2014) - A push to develop a Canadian Vitamin D Consesus that can be used to educate Canadians on the importance of optimal vitamin D levels for health is gaining support.

Vitamin D experts from around the world attended a workshop in Toronto earlier this month with the goal of reducing vitamin D deficiency in Canada.

A number of prominent Canadian disease organizations, including the Multiple Sclerosis Society of Canada, Osteoporosis Canada, the Canadan Breast Cancer Foundation and Prostate Cancer Canada attended the November 4 workshop on vitamin D.

"It's extemely encouraging to see momentum building behind efforts to improve education among Canadians on how to ensure they are getting enough vitamin D. Together, we can help people improve their health and reduce risk to several serious diseases," said workshop chairperson Dr. Reinhold Vieth, retired director of the Bone and Mineral Laboratory at Mount Sinai Hospital and a professor at the University of Toronto in the Department of Laboratory Medicine and Pathobiolgy.


full press release

Shining a light on need to boost vitamin D levels in Canada

Vitamin D Society workshop on Nov. 4 to build consensus on curbing vitamin D deficiency

TORONTO, Ont. (October 31, 2014) – As winter draws closer and our daylight hours grow shorter, Canadians are being urged to take steps to protect their health by maintaining sufficient levels of vitamin D.

To mark Vitamin D Awareness Month in November, The Vitamin D Society is spreading the word about the importance of proper vitamin D levels and the affect it has on our everyday health.

On Tuesday, November 4 in Toronto the non-profit organization is hosting the Vitamin D Consensus Workshop, featuring several international medical experts. Representatives from key disease organizations have been invited to attend to help develop a Canadian Vitamin D Consensus that can be used to educate Canadians on the importance of optimal vitamin D levels for health. The workshop comes shortly after World Vitamin D Day on November 2.

“Due to Canada’s northern latitude, Canadians cannot get sufficient levels of vitamin D through sunshine from November to May,” said workshop presenter Dr. Reinhold Vieth, retired director of the Bone and Mineral Laboratory at Mount Sinai Hospital and a professor at the University of Toronto in the Department of Laboratory Medicine and Pathobiology. “Low levels of vitamin D can create a higher risk of serious diseases, such as cancer, cardiovascular disease, diabetes, multiple sclerosis, osteoporosis and others.”

full press release

Higher Vitamin D Does Not Raise the Risk for Kidney Stones

The Vitamin D Society wants to make the public aware of a recent study which reported that high levels of vitamin D had a lower risk of kidney stones.

Woodstock, ON (PRWEB) November 29, 2013

The Vitamin D Society wants to make the public aware of a recent study published in the American Journal of Public Health, which reported that study participants with the highest vitamin D blood serum levels actually had a lower incidence of kidney stones(1). These results show that higher vitamin D intake cannot be a substantial cause of kidney stones because as participants vitamin D levels increased, kidney stone cases actually decreased. The study was sponsored by GrassrootsHealth (GRH), a nonprofit public health research organization, and was led by Dr. Cedric Garland, professor of family and preventive medicine at the University of California San Diego. The research team used data collected from 2,012 participants enrolled in GrassrootsHealth’s D*action study. This study is the first of its kind to include participants with a wide range of 25(OH)D blood serum levels, especially on the higher end of the spectrum between 100 nmol/L and 250 nmol/L, and is therefore a more rigorous test of the suggested association with kidney stones than previous studies.

full press release
Dr. Reinhold Vieth

Clinical Biochemist at Mount Sinai Hospital and Professor - University of Toronto, Departments of Nutritional Sciences and Laboratory Medicine and Pathobiology.

Click to View Carole Baggerly

"Director, GrassrootsHealth, a Public Health Promotion Organization
leading D*action, the world's largest ongoing vitamin D intervention


Click to View Dr. John Cannell M.D.

Executive Director‚ The Vitamin D Council
San Luis Obispo, CA, USA

 more advisors...

Converter Tool

In Canada Vitamin D 25(OH)D levels are measured in nmol/L. In the U.S. it is measured as ng/ml. To convert:

Enter nmol/L: ng/ml
Enter ng/ml: nmol/L