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Test Your Vitamin D Knowledge
Vitamin D is the most common nutritional deficiency in the United States, and most physicians are clueless about its importance. If you can answer the majority of these questions correctly you are doing better than the majority of physicians.
Please remember that without question the best way to optimize your vitamin D level is with regular exposure of large portions of your skin to the sun. However, with Labor Day behind us it is time for most of us to consider switching our source of omega-3 fats from fish oil to cod liver oil, as that will supply the missing vitamin D that many of us will start lacking due to diminishing sun exposure.
This test was developed by Dr. John Cannell. He is one of the leaders in the vitamin D education movement and has a very comprehensive Web site dedicated to vitamin D. You can also subscribe to his free newsletter there.
1.Vitamin D reversesinflammatory changes associated with age-related memory impairment.
a) True
b) False
True.Researchers from Ireland were the first to demonstrate that vitamin D3 acts as an anti-inflammatory agent and turns old brains into young brains--at least as far as inflammatory cytokines are concerned.This research suggests vitamin D may prevent, or even treat, age-related cognitive decline!
Biochem Soc Trans. 2005 Aug;33(Pt 4):573-7.
2. Your blood sugar is closely associated with your vitamin D level.
a) True
b) False
True.Researchers in Australia added to the growing evidence that sun avoidance may have caused the epidemic of type 2 diabetes.The Australians' findings were straightforward and powerful. The higher yourvitamin D level, the lower your blood glucose.
Clin Endocrinol (Oxf). 2005 Jun;62(6):738-41.
3. In July, a group from Minnesota found that 100 percentof elderly patients admitted for fragility fractures were vitamin-D deficient despite the fact that half of them were taking vitamin D supplements.
a) True
b) False
True.The authors found that women taking supplemental vitamin D had average levels of 16.4 ng/ml while women not taking supplements had levels of 11.9.ng/ml, both dangerously low. None of the 82 women got enough sun or took enough vitamin D to obtain a level of 40 ng/ml. These were fragility fractures, not fractures caused by unusual trauma.That is, their bones just sort of fell apart.
Curr Med Res Opin. 2005 Jul;21(7):1069-74.
4. Women with the lowest vitamin D levels had five times higher risk for breast cancer.
a) True
b) False
True.Women with 25(OH)-vitamin D blood levels less than 20 ng/ml were more than five times more likely to be diagnosed with breast cancer than were women with levels above 60 ng/ml. That is five, repeat five, timesmore likely!
Eur J Cancer. 2005 May;41(8):1164-9. Epub 2005 Apr 14.
5. Avoiding the sun doubles the risk of prostate cancer.
a) True
b) False
True.Again, the risk of avoiding the sun is clear, this time in another study with prostate cancer.However, the authors pointed out that sun exposure increases the risk of skin cancer and believed that proper vitamin D supplementation "may be the safest solution to achieve an adequate vitamin D status."
Cancer Res. 2005 Jun 15;65(12):5470-9.
I also believe supplementation is the only way to go for many people.African Americans are simply unable to spendan adequate time in the sun.In addition, the sun ages the skin and that fact alone will keep many Americans out of the sun.That said, I go into the sun whenever I can. The reason is simple: it is the most conservative thing to do. Until we know everything the sun does--and itdoes morethan just make vitamin D--the conservative approach is to mimic our ancestors and the environment in which humans evolved, whenever we can.Therefore, it makes sense to sunbathe sensibly in the late spring, summer and early fall and take supplements or use UVB lamps the rest of the time.
6. South Korean researchers associated vitamin D deficiency with Parkinson's disease.
a) True
b) False
True.Actually, they showed that certain genetic malformations (VDR polymorphisms) are more likely in patients with Parkinson's disease, implying an association with vitamin D and Parkinsonism.
J Korean Med Sci. 2005 Jun;20(3):495-8.
7. Researchers in England discovered that patients with chronic pain have phenomenally low vitamin D levels.
a) True
b) False
True.The authors added to the evidence that severe vitamin D deficiency is associated with chronic pain.They found that 88 percentof their patients with chronic pain had levels less than 10 ng/ml.If they treated their patients, they did not report it. However, Swiss researchers recently treated chronic pain patients with vitamin D and reported the pain "disappeared" within one to three months in most of their patients. This is the second open study that showed adequate doses of vitamin D dramatically improved chronic pain.
Ann Rheum Dis. 2005 Aug;64(8):1217-9.
BMJ. 2004 Jul 17;329(7458):156-7.
Spine. 2003 Jan 15;28(2):177-9.
8. Severe vitamin D deficiency is common in TB patients.
Some English doctors don't know the difference between ideal and "normal" levels.
Most American doctors don't know the difference either.
a) All are true
b) All are false
c) Some are true and some are false
All are true.First, the authors reviewed the impressive animal evidence that vitamin D can help treat TB.Then they reported that most of their
immigrant TB patients had undetectable vitamin D levels.Then they reported the normal range for their lab was between 5 to 47 ng/ml but "normal" was any level greater than 9 ng/ml. Finally, the researchers reported they treated their patients with "normal daily doses" of vitamin D, without reporting how much they gave. Apparently, they gave just enough to get patients above 9 ng/ml.
J Infect. 2005 Jun;50(5):432-7.
Keep in mind that different laboratory techniques result in different ranges for 25(OH)-vitamin D levels. No matter what technique is used, ideal levels can roughly be defined as any level above the median. In this case, as you will see below in Dr. Heaney's article, the doctors should have treated their patients with 4,000 units a day.They should also have watched for evidence of vitamin D hypersensitivity, which can occur when treating tuberculosis patients for vitamin D deficiency.
We can only mourn for the poor immigrants who have to suffer from both TB and vitamin D deficiency.Of course, few physicians in theUnited Statesknow the difference between the Gaussian definition of "normal" (average ranges for the population tested) and the ideal definition of "normal" (levels above 32 ng/ml).Getting commercial reference labs to report ideal 25(OH)-vitamin D levels should be a priority of everyone involved in trying to end the epidemic of vitamin D deficiency.
9. Virtually all nephrologists give renal failure patients a vitamin D-like drug.
Virtually all renal failure patients are severely vitamin D deficient.
Some nephrologists know the difference between vitamin D and calcitriol.
a) All are true
b) All are false
c) Some are true and some are false.
All are true.Finally, the truth about renal failure patients: most of them are vitamin D deficient despite taking vitamin D analogs!Most nephrologists prescribe activated vitamin D (calcitriol) or vitamin D analogs but not vitamin D.Calcitriol and vitamin D analogs do nothing to prevent vitamin D deficiency. Renal failure patients need both vitamin D and a calcitriol-like drug. Moreover, 400 units a day of vitamin D will not correct their deficiencies.As you will see below, they need up to 4,000 units.
Am J Kidney Dis. 2005 Jun;45(6):1026-33.
P.S.If you think nephrologists know the difference between vitamin D and calcitriol, read this month's paper from some nephrologists at the University of Texas.They discuss the importance of vitamin D in preventing and treating heart disease.(I think adequate vitamin D nutrition may prevent more cardiovascular deaths than cancer deaths.)However, I read the Texas paper three times and still don't know if the authors know the difference between vitamin D and calcitriol.I hope they know the difference between cholesterol and testosterone.(Some cholesterol is metabolized into steroid hormones, vitamin D is a prehormone; testosterone is a steroid hormone, calcitriol is the most potent steroid hormone in the human body).
Kidney Int Suppl. 2005 Jun;(95):S37-42.
10. Professor Robert Heaney proved, again, that he is a gentleman and a scholar.
a) True
b) False
True.In the most important clinical paper published this month, Heaney gave the three best reasons why we should all maintain minimum levels of at least 32 ng/ml, the level that:
(a) Effectively suppresses PTH
(b) Maximizes calcium absorptio,
(c) Maximally improves glucose tolerance
Then he goes on to show that some of us, especially African Americans, will need to take 3,000 to 4,000 units every day to maintain healthy 25(OH)-vitamin D blood levels.
J Steroid Biochem Mol Biol. 2005 Jul 15.
He then defends the Institute of Medicine's (IOM) recommendation that we only take one-tenth that amount, as the best science that was available in 1997.I admire Dr. Heaney for trying to cover for the IOM.The truth is that both Dr. Heaney and Dr. Holick told the IOM that 2,000 units a day was not toxic and would prevent both adequate treatment and meaningful research.The IOM then proceeded to ignore the only two vitamin D experts on the panel.
Writing two years later, Professor Reinhold Vieth came up with dozens of studies the IOM overlooked.These studies conclusively showed 2,000 units a day could not be toxic. Furthermore, Vieth found the literature published before 1997 clearly showed 10,000 units a day was unlikely to be toxic.Vitamin D toxicity probably starts around 20,000 units a day, and then only if taken for months or even years.
Am J Clin Nutr. 1999 May;69(5):842-56.
Related Articles: Vitamin D Deficiency is Major Health RiskThe Secret Benefits of Vitamin D Vitamin D Lowers Inflammation
About the Author: Dr. Mercola is the founder of Mercola.com, one of the world's most visited and trusted health websites, and publisher of the free Mercola.com e-newsletter -- the #1 dietary health and wellness newsletter on the Web with over 500,000 subscribers. Dr. Mercola, a physician for over two decades, is also a New York Times bestselling author whose latest book, "Dr. Mercola's Total Health Program," presents his entire renowned dietary health program and has sold over 150,000 copies. He is routinely interviewed by the media for his expert insights, including CNN and ABC World News Tonight. His passion is to change the fatally flawed conventional medical system to one focused on real prevention and cure.
Source: www.isnare.com
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American Diabetes Association Home Page |
Their mission is to prevent and cure diabetes and to improve the lives of all people affected by this disease. Available in English and Spanish. |
www.diabetes.org |
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Diabetes Information - American Diabetes Association |
The American Diabetes Association recommends the FPG because it is easier, ... Take the first steps toward better diabetes care by visiting the Diabetes ... |
www.diabetes.org |
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Diabetes UK home page - Diabetes UK |
Diabetes UK is the largest organisation in the UK working for people with diabetes, funding research, campaigning and helping people live with the ... |
www.diabetes.org.uk |
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Canadian Diabetes Association |
To promote the health of Canadians through diabetes research, education, service, and advocacy. |
www.diabetes.ca |
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Diabetes information including treating type 2 diabetes at ... |
Offers dietary recommendations, including recipes and tips on managing blood sugar levels. From GlaxoSmithKline. |
www.diabetes.com |
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Diabetes |
Web site for Diabetes. ... publishes Diabetes. Stanford University Libraries' HighWire Press ® assists in the publication of Diabetes Online ... |
diabetes.diabetesjournals.org |
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CDC Diabetes Public Health Resource |
The diabetes information homepage of the US Centers for Disease Control and Prevention, provided by the CDC’s Division of Diabetes Translation. |
www.cdc.gov |
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CDC - Health Topic: Diabetes |
Diabetes · Diabetes and Research Diagnostics · Diabetes Surveillance Report · FAQ's on Diabetes · Physical Activity and Health: A Report of the Surgeon ... |
www.cdc.gov |
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National Diabetes Information Clearinghouse |
Provides educational materials to increase knowledge and understanding about diabetes among patients, health care professionals, and the general public. |
diabetes.niddk.nih.gov |
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Diabetes mellitus - Wikipedia, the free encyclopedia |
For diabetes mellitus in pets, see diabetes in cats and dogs. ... Type 1 diabetes mellitus - formerly known as insulin-dependent diabetes (IDDM), ... |
en.wikipedia.org |
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MedlinePlus: Diabetes |
(National Institute of Diabetes and Digestive and Kidney Diseases) - Links to PDF ... Select services and providers for Diabetes in your area. ... |
www.nlm.nih.gov |
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MedlinePlus Medical Encyclopedia: Diabetes |
Diabetes affects about 18 million Americans. There are many risk factors for ... These levels are considered to be risk factors for type 2 diabetes and its ... |
www.nlm.nih.gov |
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Diabetes |
What to expect from your diabetes diagnosis? Get up-to-the-minute information about medications, insulin, blood sugar management, nutrition requirements, ... |
diabetes.about.com |
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WebMD Diabetes Health Center - Information on Type 1 and Type 2 ... |
Find in-depth information here about diabetes prevention, diet, ... Study Shows Burned-Out Staffers More Likely to Get Type 2 DiabetesGo To Article ... |
www.webmd.com |
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WebMD Health - 404 Error |
Allergies|Anxiety Disorders|Arthritis|Asthma|Back Pain|Bipolar Disorder|Cancer|Children's Health|Cholesterol|Depression| Diabetes|Diet & Nutrition|Erectile ... |
www.webmd.com |
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Diabetes Overview |
Defines diabetes, including the various types and treatments. Provides information on the impact and cost of the disease, its increasing prevalence, ... |
www.niddk.nih.gov |
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Diabetes News - The New York Times |
A free collection of articles about diabetes published in The New York Times. |
topics.nytimes.com |
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children with DIABETES Online Community |
An online community for kids, families, and adults with diabetes, featuring message boards, chat rooms, and questions/answers from medical professionals. |
www.childrenwithdiabetes.com |
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International Diabetes Institute - Diabetes Research, Education ... |
The International Diabetes Institute is the leading national and international centre for diabetes research, diabetes education and diabetes care. |
www.diabetes.com.au |
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Diabetes New Zealand |
Educates and informs people about diabetes, its treatment, prevention, and cure of diabetes. |
www.diabetes.org.nz |
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