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.

Understanding Selenium Supplementation

Posted by Margaret Groves on Tuesday, 30 June

Selenium's information from periodic table

A balance of nutrients is required by our bodies to maintain good health, and selenium (Se) is an important one that often gets overlooked.

This essential element is a required component of the selenoproteins, which include those that are needed to convert thyroid hormone from the inactive to the active form, and several important anti-oxidants.

While optimal selenium levels are imperative for proper thyroid function, abnormally high selenium intake can be toxiccausing gastrointestinal disturbances, changes in nails and hair, weakness, convulsions and decreased cognitive function. So it’s important to understand the ways in which we take in selenium, both in the diet and as supplements.

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Clearing up the Confusion about Reverse T3: Part 2. The Role of Reverse T3 in Thyroid Assessment

Posted by Margaret Groves on Friday, 08 May

Doctor stethoscope with "Thyroid" written on a signPart 2

As more health care practitioners have understood the need to assess thyroid function based on what is going on at the cellular level, there has been an increasing demand for testing of reverse T3 (rT3), a hormone sometimes referred to as the “hibernation hormone.” However, there is also much confusion about how it fits into the picture of thyroid function, and controversy regarding whether or not there is a clinical utility for this test in patients suffering from thyroid imbalance symptoms.

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Clearing up Confusion about Reverse T3: Part 1. The Deiodinases & Thyroid Hormone Bioavailability

Posted by Margaret Groves on Monday, 04 May

X-Ray of Thyroid gland

Part One

Thyroid hormones are essential for the normal metabolic functioning of all tissues in the body, and a wide array of symptoms are therefore associated with abnormalities in thyroid hormone production and activation. Even when apparently adequate amounts of thyroxine are produced by the thyroid gland, thyroid function is profoundly affected by anything that disrupts conversion of thyroxine (T4) to the active thyroid hormone, triiodothyronine (T3). This conversion takes place primarily at the cellular level within tissues; only 20% of circulating T3 is generated by conversion of T4 within the thyroid gland itself.

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Controversy Surrounds an Upsurge in Thyroid Cancer Detection

Posted by Dr. Sherry LaBeck on Thursday, 25 September

provider checking patient's thyroid glandSeptember was Thyroid Cancer Awareness Month. It's October now, but the increasing incidence of thyroid cancer makes it a timely topic for any time of the year.

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