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


Good Day Sunshine: Vitamin D In Smart Doses Helps Avert Many Problems
Sep 18, 2017

he sun's out, so go out and play.

If you're like me, you probably heard this admonishment more than once from your mother or a friend's mom while growing up. Yet despite how annoying the advice may have seemed when a favorite television show felt like a better option, health experts are moving ever closer to agreement that it's among the best pieces of advice any of us will get.

The benefits of exercise and fresh air aside, what we often fail to appreciate while outdoors is simply the sunlight — that life-sustaining energy that bestows a myriad of biochemical perks on us and the absence of which is extraordinarily bad for our health.

For reasons best understood by the biochemists and endocrinologists, the ultraviolet energy in sunlight converts a cholesterol-related compound found in the skin to vitamin D. A little more jiggering by native enzymes and some magic performed in the liver and kidneys and you get a bioactive hormone that regulates an array of biological functions ranging from bone formation to cell communication throughout the body.

Now, after years of telling us that too much sunlight is the enemy that leads to wrinkles and skin cancer, many scientists are adopting a more balanced position on sunlight. Evidence is growing that the right amount of vitamin D, derived from sunlight and diet, may play a role in preventing many ailments — including childhood asthma, some cancers, diabetes, autism and autoimmune disorders such as multiple sclerosis (MS) — or in reducing their severity. It also protects against acute respiratory tract infections that can trigger asthma attacks, particularly in children.

full story . . .
Low vitamin D levels linked to risk of multiple sclerosis
Sep 18, 2017

New large-scale European research has found that vitamin D levels in the blood could predict a person's future risk of developing multiple sclerosis.

Although previous studies have already suggested a link between vitamin D and the risk of MS, study author Kassandra Munger, of the Harvard T.H. Chan School of Public Health in Boston, explained that these studies have been small in size.

The new research however used blood sample from more than 800,000 Finnish women to see if correcting a vitamin D deficiency in young and middle-age could reduce the future risk of MS.

full story . . .
The importance of vitamin D and conscious sun exposure: Part 2
Aug 18, 2017

In the previous article, I explained why vitamin D is crucial for us, but that in the majority of the countries, over 70% of the population has vitamin D deficiency. I went through the scientific evidence that links vitamin D deficiency to many diseases, including musculoskeletal disorders, cancer, autoimmune diseases, infectious diseases, neurologic and psychiatric diseases, among others. If you haven’t read this article yet please go here.

In this second article about vitamin D, I write about:

– factors that contribute to the observed pandemic of vitamin D deficiency

– the recommended vitamin D levels

– what you can do to get there.

In my next article, I will write about the problem with sunscreens and what you can do to protect yourself from the sun naturally.

full story . . .
The importance of vitamin D and conscious sun exposure: Part 1
Aug 18, 2017

Vitamin D is so important to prevent and also to help overcome so many diseases. Its importance has been underestimated for many years. Nowadays, finally, scientific research is warning us of the impact of vitamin D to our health.  Since it is summer now in the northern hemisphere, I thought that I should dedicate an article to the importance of vitamin D. Hopefully, after reading this and the next article (Part 1 and Part 2), you will be more motivated and less afraid to consciously sunbath :). And I will explain later what I mean with being “conscious” in Part 2.

Vitamin D deficiency is a pandemic [1]. When you look at the estimated vitamin D deficiency in many countries [2], you see that in the majority of them, it accounts for more than 70% of the population. Even in countries with a lot of sunlight, such as Brazil, you see that 77% of the population has vitamin D deficiency! This really is a major global health concern. And why is it such a big problem? Well, because vitamin D is crucial to all systems in our body and vitamin D deficiency has been linked to many diseases: musculoskeletal disorders (muscle weakness, falls, fractures), cancer, autoimmune diseases, infectious diseases, neurologic and psychiatric diseases, infertility and adverse pregnancy and birth outcomes, among many other conditions, including  all-cause mortality [1, 3]. We will go in more detail through this, but first:

full story . . .
The Sunshine Remedy
Aug 15, 2017

Why a daily dose of unfiltered sun may be essential for better health

Without the sun, there is no life. The sun stirs our atmosphere, warms our oceans, and gives energy to plants that generate oxygen and food.

The sun also influences our body and mind in ways that modern science is only beginning to appreciate.

For most of human history, people revered the sun, even worshipped it as a deity. For the ancient Greeks, the sun god was Apollo, who, among many other things, taught men the art of medicine.

full story . . .
The Sunshine Vitamin
Aug 10, 2017

Showing off a nice tan is not the only positive result that comes from being exposed to the sun. Our health can also benefit from it, even offsetting the risk of developing skin cancer. This is indicated by the latest research on vitamin D, a molecule that our skin synthesizes when it receives sunlight and which is accumulated during the summer, with prolonged exposures. It now seems that low levels of vitamin D in the body are linked to increased incidences of cancer, diabetes, respiratory infections and heart problems.

The direct relationship between low levels of vitamin D and cancer, regardless of where we live, was confirmed last spring by researchers at the University of California (USA). In an article published in PLOS ONE, they calculated the exact levels of this molecule that we need to have in the blood to dramatically reduce the risk of tumors. They concluded that women who reached concentrations of this vitamin of 40 nanograms or more per milliliter of blood were 67% less likely to suffer from cancer. Notably, this is twice the amount of vitamin D recommended by the US Institute of Medicine to ensure good bone health.

full story . . .
Joint International Symposia
Jun 21, 2017        

Vitamin D in Prevention and Therapy (June 21-22, 2017)


Biologic Effects of Light (June 22-23, 2017)

 Schlossberg Hotel Homburg, Germany

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Sep 22, 2017        8:00am

Medius Corporation is delighted to welcome you to the




September 22-23, 2017 | Warsaw

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If you are not taking vitamin D daily - then it may not be working
Aug 03, 2017

by Carole Baggerly, Director at GrassrootsHealth

Today I have decided to get all the exercise I will need this month. So, I am going to get up, head to the gym and do 15 different sessions of cardio interspersed with 15 different sessions of my weight machines. Then, I will take a yoga class to round out the day. 

Ridiculous - right? 


full post . . .
Are People Really Taking Sky-High Doses of Vitamin D?
Jul 11, 2017

By Perry Holman, Executive Director, Vitamin D Society

A new study1 recently reported trends in vitamin D supplementation in the USA from 1999 to 2014. It found that that vitamin D supplement use of ≥1000 IU or more per day increased from 0.3% in 1999 to 18.2% in 2014. Also vitamin D supplement use of ≥4000 IU per day increased from 0.2% in 2007 to 3.2% in 2014.

The researchers made this key point in their discussion:

“Overall, 3% of the population exceeded the tolerable upper limit of 4000 IU daily, and may be at risk of adverse effects as a consequence”

But how many people were really supplementing over 4000 IU/d? If they were just taking 4000 IU/d there would be no risk as this is the safe upper limit and does not require doctor supervision.

full post . . .
Why Sunshine is good for you and the best source for Vitamin D!
May 12, 2017

We interviewed Dr. Michael Holick on why sunshine is good for you and the best source for vitamin D. Here is what he said:

In your opinion what is the root cause of vitamin D deficiency?

The 2 major reasons for the global D deficiency epidemic are the lack of understanding that very few foods naturally contain vitamin D and that sunlight has been and continues to be a major source for vitamin D worldwide.  The recommendation by many health organizations that neither children or adults should be exposed to direct sunlight has been a major factor in causing this pandemic.

Do you think the risks of moderate, regular sun exposure, such as skin cancer, has been over emphasized to the public?

There is no question that the abstinence message from national and international health organizations regarding sun exposure has been a major contributor to the vitamin D deficiency pandemic.  A recent study has suggested that moderate regular sun exposure does improve a person's vitamin D status and that mechanisms are at play in the skin to reduce the damaging effects from moderate regular sun exposure.


full post . . .

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...


Summer Smart Sunshine Tips to Boost Vitamin D Levels

For Immediate Distribution

TORONTO, Ont (April 4, 2017) – The daylight hours are getting longer, the sun is getting stronger and summer is just around the corner. Make this the year that you optimize your vitamin D levels through effective sun exposure. Enjoy the health benefits and disease prevention from optimal vitamin D levels and learn to control your risks from sun exposure.

Vitamin D is made naturally in your body when UVB rays from the sun convert cholesterol in your skin to pre-vitamin D3. We make about 90% of our vitamin D from UVB sun exposure. UVB rays are short and only reach the earth when the sun is directly above us. We can’t make vitamin D in the winter in Canada because the sun is at too low of an angle and the UVB rays are absorbed in the atmosphere.

You make vitamin D in Canada between the months of May and October. The best time for exposure is around midday, between 10am and 2pm, when the UV index is above 3 and your shadow is shorter than your height. The further you get from noon, the lower the amount of vitamin D you’ll make. The sun’s visible light may penetrate through glass, but UVB light will not therefore you will not make vitamin D.

full press release

Study finds Vitamin D effective for reducing flu and colds

For Immediate Distribution

TORONTO, Ont (March 1, 2017) – People who boost their vitamin D levels with supplements reduce their risk of respiratory tract infections, such as the flu, by up to 12%, according to a new systematic review and meta-analysis study of 25 randomised controlled trial (RCT) studies published recently in the British Medical Journal (BMJ).

The study reported that this equates to one person being spared a respiratory tract infection (RTI) for every 33 taking vitamin D supplements. The benefit is greater in those receiving daily or weekly vitamin D versus bolus or monthly dosing, with the number needed to treat dropping to 20. The impact in Canada, based on a population of 35 million people, shows vitamin D could spare 1.75 million people having one RTI per year.

full press release

New Canadian study provides strong evidence that low vitamin D levels cause Alzheimer’s Disease

For Immediate Distribution

TORONTO, Ont (January 18, 2017) – A new scientific study published in Neurology from researchers at McGill University has provided evidence to support vitamin D as a causal risk factor for Alzheimer’s disease (AD). The McGill study found that lower vitamin D levels increased the risk of Alzheimer’s disease by 25% using a Mendelian randomization (MR) methodology which minimizes bias due to confounding or reverse causation.

Alzheimer’s disease is expected to double throughout the world in the next 20 years. The Alzheimer Society of Canada estimates that approximately 747,000 Canadians are living with some form of dementia.

There is no treatment that can effectively stop the progression of Alzheimer’s disease despite considerable effort. Therefore, disease prevention through modifiable risk factors where possible is critical. Ensuring vitamin D sufficiency through increased non-burning sun exposure in summer or vitamin D supplementation may be a cost-effective approach to help reduce Alzheimer’s disease risk.

full press release
Click to View Dr. Reinhold Vieth

Professor, University of Toronto, Departments of Nutritional Sciences and Laboratory Medicine and Pathobiology.

Click to View Dr. Michael Holick, Ph.D., M.D.

Professor of Medicine, Physiology and Biophysics; Director of the General Clinical Research Unit; and Director of the Bone Health Care Clinic and the Director of the Heliotherapy, Light, and Skin Research Center at Boston University Medical Center.

Click to View Dr. Cedric Garland, DrPH

Professor Emeritus in the Department of Family Medicine and Public Health at the University of California, San Diego.

 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