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Dangerous Vitamin D Supplement Mistake

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According to the latest research, D3 is approximately 87 percent more potent in raising and maintaining vitamin D concentrations and produces 2- to 3-fold greater storage of vitamin D than does D2. Regardless of which form you use, your body must convert it into a more active form, and vitamin D3 is converted 500 percent faster than vitamin D2. Vitamin D2 also has a shorter shelf life, and its metabolites bind poorly with proteins, further hampering its effectiveness.

Unfortunately, vitamin D2—which is a synthetic version made by irradiating fungus and plant matter—is the form of vitamin D most often prescribed by doctors in the U.S. Hopefully this will change sooner rather than later.

As stated by Dr. Cannell in the featured article:

“While there may be explanations for D3′s superiority other than improved efficacy, for the time being, these papers send doctors a message: use D3, not D2.”

The Incredible Health Benefits of Vitamin D

Optimizing your vitamin D levels may be one of the most important steps you can take in support of your long-term health. There’s overwhelming evidence that vitamin D is a key player in your overall health. This is understandable when you consider that it is not “just” a vitamin; it’s actually a neuroregulatory steroidal hormone that influences nearly 3,000 different genes in your body. Receptors that respond to the vitamin have been found in almost every type of human cell, from your brain to your bones.

Just one example of an important gene that vitamin D up-regulates is your ability to fight infections, as well as chronic inflammation. It produces over 200 antimicrobial peptides, the most important of which is cathelicidin, a naturally occurring broad-spectrum antibiotic. This is one of the explanations for why it can be so effective against colds and influenza.

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Dr. Mercola

Dr. Mercola has been passionate about health and technology for most of his life. As a doctor of osteopathic medicine, he treated many thousands of patients for over 20 years. In the mid 90’s he integrated his passion for natural health with modern technology via the internet and developed a website, to spread the word about natural ways to achieve optimal health.


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1:40PM PST on Jan 28, 2014

A good reason to use a substitute for fish oil.

5:41PM PDT on May 30, 2012

yikes thanks

12:19AM PDT on Mar 22, 2012

Very good article!I needed this info!

1:48PM PDT on Mar 13, 2012

The BEST Vitamin D3 !:
In more than 26 years in the Alternative Health Industry I've found, a consistent thing Supplement consumers don't understand. The Source and Processing, etc., of the base ingredient, are indicative of quality. And NOT Brand Name or HYPE! (just because the company has the money for Adds and Assays, doe's not mean they have the best product!)
With Applied Kinesiology I have found that one of the BEST Vitamin D3 products on the market, is in a Dry form, sold by Swanson's Vitamins. It also happens to be ONE of the LEAST EXPENSIVE!
When you use a Good quality product you absorb more of its ingredient. 4 years ago I with taking 3000 IU a day (front dumping), and gradually (w/AK)I only need to take 1000 IU a day. I haven't had a cold in 4 years. Curiously, the 1000 IU tests evan More potent than the 2000 IU. (I suspect assimilation, machinery,etc.)

#SW1030 •1,000 IU 250 Cps for only $2.99/Vit D-3
=*Please make your first order by phone. Mention my Cust #012930042. We each get a coupon!

11:54AM PST on Feb 25, 2012

Interesting article. I currently take Vit D-3- 5, 000IU/day due to a medical condition. However, I have recently changed to a vegan diet & have been looking for a D-2 supplement instead. Reading this information now causes me concern. Will definately have to do more research on the D-2 to determine if it really is more detrimental than animal based D-3.

11:19PM PST on Feb 22, 2012

I do miss the sunshine, sunny skies, sunnier personalities and bright, vibrant colours. Unfortunately, our sun is there above the clouds but too shy to show it's face when you live as far north as Canada. Vit D surely makes a huge difference in the health and well-being of people

6:47PM PST on Feb 22, 2012


4:18PM PST on Feb 22, 2012

I think that it is important to mention that if you get sun exposure for Vit D your skin needs time to absorb it which takes a while. Most of us wash off the vitamin D when we take a shower so the longer you let the skin absorb the vitamin D the better.

In general synthetic vitamins are bad for you. Some say that they are identical to natural vitamins in their molecular structure when actually they only have one component of the natural vitamin. Many people who take vitamins get sick after using them for a while and the reason for this is that the synthetic vitamins are chemicals made in a lab and these chemicals are toxic and can build up in your body affecting many of your organs especially your liver.

If you want natural vitamins look for "Whole food vitamins" on the package. These will tend to be more expensive because they are taken from whole foods (fruit, veggies, grains, mushroom, algea, etc). But would you put a price on your health?

11:23AM PST on Feb 21, 2012

I had my Vitamin D levels tested a year ago and
they showed very low levels of the vitamin.
I am fortunate my rheumatologist knew
to specifically prescirbe Vitamin D3 supplements
I livei n the Pacific Northwet, so I get little
sun. A tannning bed is not an option, because
of cost. So supplements are the way to
go for me.

11:16AM PST on Feb 21, 2012

I would suggest reading the Mayo Clinic site on Vitamin D before proceeding on this advice. It is possible to overdose on Vitamin D, which can cause a buildup of calcium in the blood, which can cause serious problem for some people. 1000 i.u is usually the recommended dose, ammounts over that should only be taken under a doctors supervision and over 4000 i.u on a regular basis can cause serious problems. I am suprised that Care 2 does not care enough to vet these articles to make sure that unsafe information is not being distributed on its site.

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Disclaimer: The views expressed above are solely those of the author and may not reflect those of
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