Power of Vitamin D
by Sarfraz Zaidi, MD
Print on Demand Publisher A Vitamin D Book that contains the most comprehensive and useful information on Vitamin D deficiency, Vitamin D level, Diagnosis, Treatment and Toxicity of Vitamin D.
Ordering Information
6.14 x 9.21 paperback
ISBN: 9781432748104
$15.95    
 
 
 
Book Information
Genre:
 MEDICAL / General
Publication:
 Jan 22, 2010
Pages:
 179
 
Books by Sarfraz Zaidi, MD

Vitamin D is crucial to our health, yet most people are low in this vital vitamin - despite the vitamins they take, the foods they eat, the milk they drink or the sun exposure they receive.



In Power of Vitamin D you will learn:

• Why we are facing a true Epidemic of Vitamin D deficiency.



• The crucial role Vitamin D can play in the Prevention as well as Treatment of various Cancers.



• How Vitamin D can help Prevent Diabetes, Coronary Heart Disease, Hypertension and Kidney Disease.



• How Vitamin D can Prevent as well as Treat Muscle Aches, Chronic Fatigue, Fibromyalgia, Bone Pains and Osteoporosis.



• The vital role of Vitamin D in the normal functioning of the Immune System.



• How Vitamin D can Prevent as well as Treat the Common Cold, Tuberculosis, Asthma, Thyroid Diseases, M.S., Lupus and Arthritis.



• The essential role of Vitamin D during Pregnancy for Mothers and Babies.



• Doctors frequently miss the Diagnosis of Vitamin D deficiency because they often order the wrong test.



• The right test to Diagnose Vitamin D deficiency.



• The best way to Prevent and Treat Vitamin D deficiency.



• Vitamin D Toxicity and how to Prevent it.



• Not just theoretical knowledge, but detailed, practical information from actual Case Studies.
 
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Chapter 22



Diagnosis of Vitamin D Deficiency



It’s easy to diagnose vitamin D deficiency: It’s a simple blood test. That’s all! However, it needs to be the right test and must be interpreted properly! And that’s where a lot of problems arise.





What’s the Right Test to Diagnose Vitamin D Deficiency and Why?



Laboratories offer two tests to determine vitamin D level in the blood. In vitamin D deficiency, one of them is low whereas the other one is often normal. Most physicians don’t know the distinction between these two tests and may order the wrong test. Consequently, they may say your vitamin D level is normal, when it’s actually low.



The right blood test to evaluate your vitamin D status is:

25 (OH) vitamin D (25-hydroxy vitamin D ).





The other blood test for vitamin D is 1,25 (OH)2 vitamin D (1,25 dihydroxy vitamin D).

This is the wrong test to diagnose vitamin D deficiency! Why?



There are two reasons why 25 (OH) vitamin D and not 1,25 (OH)2 vitamin D is the right test to diagnose vitamin D deficiency.



Reason 1:

25 (OH) vitamin D stays in your blood for a much longer period of time (half life of about 3 weeks) compared to 1,25 (OH)2 vitamin D (half life of about 14 hours).

Therefore, 25 (OH) vitamin D more accurately reflects the status of vitamin D in your body.



Reason 2:

As vitamin D deficiency develops, your body increases production of parathyroid hormone by the parathyroid glands situated in your neck. Parathyroid hormone increases the conversion of 25 (OH) vitamin D into 1,25 (OH)2 vitamin D. Consequently, 1,25 (OH)2 vitamin D level in the blood will stay in the normal range (and can even be high) even if you’re low in 25 (OH) vitamin D.





CASE STUDY

Jenny, a 63 years old Caucasian female got her vitamin D testing done. The tests included 1,25 (OH)2 vitamin D as well as 25 (OH) vitamin D.

Her 1,25 (OH)2 vitamin D turned out to be high as 72 pg/ml (reference range 15-55 pg/ml).

Her 25 (OH) vitamin D level was extremely low as 5 ng/ml (30- 100 ng/ml).

Her parathyroid hormone level was markedly elevated as 571 pg/ml (reference 12-65 pg/ml).



Her diagnosis was secondary hyperparathyroidism due to severe vitamin D deficiency. If she only had the 1,25 (OH)2 vitamin D level done, her diagnosis of severe vitamin D deficiency would have been missed because her 1,25 (OH)2 vitamin D was not low, but high.



Her 1,25 (OH)2 vitamin D level was high due to her high level of parathyroid hormone which converted 25 (OH) vitamin D into 1,25 (OH)2 vitamin D. In fact, she was very low in vitamin D as was accurately demonstrated by her very low level of 25 (OH) vitamin D.

About Sarfraz Zaidi, MD

 Sarfraz Zaidi, MD, FACP, FACE is an Assistant Clinical Professor of Medicine at UCLA. Dr. Zaidi is a leading expert on Vitamin D, Diabetes and Thyroid. He frequently lectures other physicians as well as the public. He has published numerous articles in medical journals.

Dr. Zaidi is also director of the Jamila Diabetes and Endocrine Medical Center in Thousand Oaks, California, where he treats patients on a daily basis. Dr. Zaidi is also the author of the popular Diabetes book, Take Charge of Your Diabetes.

Website: www.DoctorZaidi.com





Tel: (805)495-7143

email:zaidi@doctorzaidi.com
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