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.

Determining the Functional Causes of Hypothyroid Symptoms

Posted by Jim Paoletti on Tuesday, 08 December

2014-02-12_215-4.jpg

Hypothyroidism is defined as:

“lack of thyroid hormone production from the thyroid gland.” 

However, many patients who produce sufficient hormone from the gland still suffer from low thyroid symptoms. 

Read More

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

ThinkstockPhotos-467771145Part 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.

Read More

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

Posted by Margaret Groves on Monday, 04 May

ThyroidPart 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.

Read More

Controversy Surrounds an Upsurge in Thyroid Cancer Detection

Posted by Dr. Sherry LaBeck on Thursday, 25 September

Thyroid Examination

September 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.

Read More