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.

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.

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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

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.

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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.

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A Journey Through Thyroid Cancer

Posted by Ted Brandon on Thursday, 04 September

thyroid image

January 2009: I woke up one morning, and randomly rubbed the left side of my neck. I felt two very large bumps, which I assumed were swollen lymph nodes. “I’m just fighting something,” I told myself, and promptly forgot about them. Whether it was denial or just my natural forgetfulness (ok, it was probably denial…), I didn’t do anything about the lumps for about 9 months.

September 2009: I mentioned the still-present lumps to my wife at the time, and both of us agreed that it was time to take some action. There was no way my body was still fighting something for 9 months, and I was fairly confident that the lumps had remained there over the entire course of time. I made an appointment with my ENT, and he confirmed that they were indeed swollen lymph-nodes. We decided to perform a fine-needle biopsy of the nodes. It wasn’t guaranteed to be confirmatory, and sure-enough, the results came back as “atypical.” I had received an atypical diagnosis in the past for a mole on my back that had been removed. I never really understood what that meant, but just had the feeling that it wasn’t exactly cancer... yet. However, my ENT told me that this time, it was a more vague diagnosis than confirmatory of anything in particular, and recommended an excisional biopsy.

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