Graves' Disease And Hyperthyroidism: What You Must Know Before They Zap Your Thyroid With Radioactive Iodine by Sarfraz Zaidi MD

Author:Sarfraz Zaidi MD [Zaidi MD, Sarfraz]
Language: eng
Format: epub
Tags: disease, disease diet, radioiodine, natural treatment of graves disease, graves&#x2019, thyroid antibodies, disease test, overactive thyroid, book on graves&#x2019, hyperthyroidism book
Publisher: iComet Press
Published: 2014-03-26T04:00:00+00:00

Why Are The Normal Ranges For 25 (OH) Vitamin D Inaccurate?

The normal ranges for Vitamin D come from the era when our concern was just to prevent rickets. A small dose of Vitamin D is enough to prevent rickets. Therefore, a level of 25 (OH) vitamin D of 10 ng/ml (25 nmol/L) or above was established as adequate to prevent rickets. That’s why many laboratories report 10 ng/ml (25 nmol/L) as the lower limit of the normal range.

However, in recent years our understanding of the effects of Vitamin D has dramatically changed. Now we understand that Vitamin D can do much more than simply prevent rickets. In fact, Vitamin D is crucial for maintaining many vital functions in the body, such as a healthy immune system and a healthy heart. In addition, an adequate level of Vitamin D helps prevent diabetes, osteoporosis and cancer.

To achieve these goals, many experts in the field (myself included) recommend a level of 25 (OH) vitamin D to be at least 30 ng/ml (75 nmol/L) and preferably above 50 ng/ml (125 nmol/L). An excellent review of scientific studies (4) published in the American Journal of Clinical Nutrition in 2006 concluded that the most beneficial blood level of 25 (OH) vitamin D starts at 30 ng/ml (or 75 nmol/L).

Unfortunately, many laboratories continue to report a normal range with the lower limit of 10 ng/ml (25 nmol/L). Now imagine the following scenario: Your 25 (OH) vitamin D level is 19 ng/ml.; Your physician interprets this as normal because it’s in the “normal range” provided by the laboratory. However, you are actually quite low in Vitamin D! This happens all too frequently.

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