The ZRT Laboratory Blog

The ZRT Blog is an extensive resource for patients and health care providers searching for health and hormone testing information. Here, you can read about ZRT’s cutting edge research, advances in testing, wellness advice, and health industry highlights.

Flaws in the Iodine Loading Dose Urine Test

Posted by Dr. David Zava on Thursday, 18 December

Periodic table

I began the study of iodine because I believe it has benefits to human health. As a breast cancer researcher I believe that iodine protects the breasts and uterus against toxic and mutagenic estrogen metabolites that form in some people more than others. Thus, choosing the most reliable test to a) determine iodine status, and, b) supplementation to maintain levels seen in populations with lowest rates of breast cancer (ie. the Japanese), is a key health consideration with or without breast cancer risk factors.

That leads us to the all-important discussion of iodine testing methods. Have you ever had your levels evaluated with a 24-hour iodine loading test and been found to be deficient? If so, you are not alone. This is a test where 98-99% of people who take it will be deemed “whole body iodine deficient”. On the basis of this test result, you may be advised to take iodine supplements at a dose that makes some people ill, and raises iodine to hundreds of times the levels recommended by health organizations around the world. In the most serious cases, the dosing recommended to get you to “whole body iodine sufficiency” may cause your thyroid to stop working normally, producing either too much (hyperthyroid) or too little (hypothyroid) thyroid hormone.

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Protect Your Thyroid Health

Posted by Candace Burch on Thursday, 30 January

164627165_lores.jpgAs January's Thyroid Awareness Month winds down, now is the time to practice all we've learned about the care and feeding of our master of metabolism. In Part I of our last blog post, we zeroed in on the enemies of a healthy thyroid. In Part II, we will help you fend them off to protect the health of your thyroid gland with the following key action steps.

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Environmental Elements and Your Thyroid Health

Posted by ZRT Laboratory on Monday, 20 January

ThinkstockPhotos-639598710.jpgEnvironmental pollutants are in the air we breathe, water we drink and bathe in, and food we eat. In excess, they can have profound negative effects on the basic mechanisms of body chemistry and affect the synthesis and actions of hormones essential for maintaining our health.

The thyroid, which is primarily responsible for regulating metabolism, is profoundly affected by natural and environmental pollutants.

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Evaluation of the Iodine Loading Test: Urine Iodine Excretion Kinetics after Consumption of 50 mg Iodine/Iodide

Posted by ZRT Laboratory on Friday, 15 March

Theodore Zava, a research associate at ZRT Laboratory, was recently published in the Townsend Letter for his work with iodine testing.

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