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


Low vitamin D may lead to poor outcomes, infections in patients with cirrhosis
Jul 06, 2015

Low 25-hydroxyvitamin D3 levels were found to be associated with advanced liver disease, poor outcomes and infectious complications in patients with cirrhosis, according to study data.

“Observations in cirrhotic patients showed a poor prognosis in individuals with low [25-hydroxyvitamin D3] levels,” the researchers wrote. “Given the fact that cirrhotic patients presenting with infections or elevated inflammatory conditions indicated by high levels of [C-reactive protein] or [soluble CD163], have an unfavorable prognosis and that expression of [toll-like receptors] inversely correlate with vitamin D levels, we hypothesized that low vitamin D levels might be associated with inflammatory responses and infectious complications in cirrhotic patients.”

full story . . .
Looking for Links Between Testosterone and Vitamin D Levels
Jun 30, 2015

A new analysis has found that low levels of vitamin D are independently associated with low levels of testosterone in healthy middle-aged men.

Researchers analyzed blood samples from 824 men who participated in the World Trade Center CHEST program for a range of biomarkers and found the tie between 25-hydroxyvitamin D and total testosterone.

Most of the men (68%) had naturally low levels of 25-hydroxyvitamin D, which was defined as below 30 ng/L, and only 11% of the men took vitamin D supplements to correct the shortage.

The men who failed to correct the deficiency, on average, had total testosterone levels of 319.6 ng/L, while men who took supplements, and men with naturally sufficient levels of vitamin D, had total testosterone levels that averaged 341.7 ng/L (P=.012).

full story . . .
Scientific Consensus Paper Released; Asserts Sunlight and Vitamin D are Essential for Human Health
Jun 25, 2015

ENCINITAS, Calif., June 23, 2015 /PRNewswire-USNewswire/ -- Yesterday, the Journal of the American College of Nutrition published a scientific consensus paper authored by scientists from the University of California, San Diego, Creighton University, Boston University Medical Center, and the Medical University of South Carolina, along with other research contributors. The paper presents information to illustrate that UV exposure not only provides the benefits of vitamin D production, but also many additional health benefits not related to vitamin D. The current culture of sun avoidance in the United States carries with it both health risks and quantifiable harm.

The consensus was developed by GrassrootsHealth, 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 and Dr. Robert P. Heaney, Professor of Medicine and John A. Creighton University Professor Emeritus of Creighton University.

full story . . .
Weight loss, combined with vitamin D, reduces inflammation linked to cancer, chronic disease
Jun 25, 2015

First study of its kind to test effect of vitamin D and weight loss on inflammatory biomarkers

SEATTLE — June 24, 2015 ­— For the first time, researchers at Fred Hutchinson Cancer Research Center have found that weight loss, in combination with vitamin D supplementation, has a greater effect on reducing chronic inflammation than weight loss alone. Chronic inflammation is known to contribute to the development and progression of several diseases, including some cancers.

Results of the randomized, controlled clinical trial — which involved more than 200 overweight, postmenopausal women who had insufficient levels of vitamin D at the beginning of the study — are published online ahead of the July print issue of Cancer Prevention Research, a journal of the American Association for Cancer Research.

full story . . .
Current vitamin D recommendations for children may be inadequate
Jun 24, 2015

Most children with vitamin D deficiency who received daily supplements still failed to reach the recommended concentration of 30 ng/mL after 6 months, according to research in The Journal of Clinical Endocrinology & Metabolism.

In a randomized, double blind, placebo-controlled trial of vitamin D in otherwise healthy children from Pennsylvania, researchers also found that the effects of vitamin D supplementation varied by race and that supplementation was more effective and significant only in black children.

Kumaravel Rajakumar, MD, MS, of the department of pediatrics at the University of Pittsburgh, and colleagues analyzed data from 157 healthy children aged 8 to 14 years (84 black, 73 white) who were not receiving vitamin supplements. Researchers enrolled children from October to March of 2008 to 2011 and randomly assigned the participants to 1,000 IU vitamin D daily or a daily placebo for 6 months. Researchers measured BMI, summertime sunlight exposure, melanin indexes and dietary intake of vitamin D and calcium using a food frequency questionnaire at baseline and 6-month follow-up visits. Researchers also measured serum calcium, phosphorus, albumin, 25-hydroxyvitamin D, parathyroid hormone (PTH), osteocalcin and collagen type 1 cross-linked C-telopeptide (CTx) concentrations at baseline, 2 months and 6 months.

full story . . .
Radiation in sunlight reduces weight gain, findings independent of vitamin D research
Jun 18, 2015

Recent research supports the potential for sunlight to reduce the risk of excessive weight gain and also questions the effectiveness of vitamin D supplements to prevent obesity.

Obesity remains a growing health issue in Australia with more than 60 per cent of adults and 25 per cent of children suffering from abnormally high body fat accumulation.

Excessive weight gain, like , insulin resistance and elevated , contributes to metabolic syndrome (MetS), a chronic disease linked to adult type II diabetes and heart disease.

Telethon Kids Institute research fellow Dr Shelley Gorman's latest study showed repetitive exposure to ultraviolet (UV) radiation prevented in experimental mice, which were kept on a high fat diet.

"These findings were independent of circulating vitamin D and could not be mimicked by vitamin D supplementation," she says.

"While there seems to be a link between and vitamin D, it remains uncertain whether there is a causal effect."

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.

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Spring Sunshine Welcomed as Canadians Vitamin D Levels Plummet

Risk increased for a number of serious diseases

WOODSTOCK, Ont. (March 19, 2015) – A new Statistics Canada report has confirmed that 12 million Canadians have vitamin D blood levels that are below what Health Canada recommends and vitamin D levels continue to drop from previous years.

Results from the 2012 to 2013 Canadian Health Measures Survey (CHMS), released December 2014, report that 35% or 12 million Canadians have vitamin D blood levels below the Health Canada guideline of 50 nmol/L. This has increased by 3% from the previous Statistics Canada report (2009-2011) of 32%. The mean average vitamin D level for Canadians age 6-79 years has also dropped by 9.9% over the last 4 years from 68 nmol/L to 61 nmol/L. “This downward trend in vitamin D blood levels is putting more Canadians at a higher risk for many cancers including colon, breast and prostate, as well as for cardiovascular disease, diabetes, multiple sclerosis, osteoporosis and other serious diseases” stated Perry Holman, Executive Director of the Vitamin D Society.

full press release

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
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