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.

Re-assessing the Notion of "Pregnenolone Steal"

Posted by Dr. Thomas Guilliams on Wednesday, 21 June

ThinkstockPhotos-687447022-pregnenolone-.jpgWhen clinicians measure salivary cortisol and DHEA (DHEA-S) to assess stress and HPA axis function, it is common to find DHEA levels below the reference range in a number of individuals. A common explanation for the depletion of DHEA and other hormones (e.g., progesterone, testosterone) due to chronic stress is the phenomenon known as "pregnenolone steal."

The pregnenolone steal notion basically states that since all steroid hormones use pregnenolone (derived from cholesterol) as a precursor, the elevated secretion of cortisol caused by acute or chronic stress will inevitably result in less available pregnenolone to serve as a precursor for the production of DHEA and other down-stream hormones.

Read More

Is it Adrenal Fatigue? Reassessing the Nomenclature of HPA Axis Dysfunction.

Posted by Dr. Thomas Guilliams on Tuesday, 25 April

hPA.Axis_lores_crop.jpgSometimes, when we endeavor to understand and describe complicated medical topics, there is a temptation to find a simple explanation to cut through the complexity. These explanations can help bridge the knowledge gap for a while, but as our knowledge grows, they lose some of their original usefulness (e.g., the notion of “good” and “bad” cholesterol).

Read More

Herbal Remedies for Sleep Disturbances & the Nervous System

Posted by Dr. Sherry LaBeck on Wednesday, 29 March

ThinkstockPhotos-475843287.jpg

O sleep, O gentle sleep,
Nature's soft nurse, how have I frighted thee,
That thou no more wilt weigh my eyelids down
And steep my senses in forgetfulness?

William Shakespeare, Henry IV

A good night's sleep is important to health. During sleep the body is in an anabolic state when energy conservation, tissue repair and growth take over. The body temperature drops, growth hormone is secreted and immune cell production is increased. Thus sleep is essential for a healthy body and a peaceful mind.

Read More

How Stress Caused My Cancer

Posted by Dr. Robert Zembroski on Thursday, 12 January

 scar_cancer_crop.jpg

After beating cancer, Dr. Zembroski (above) strives to prevent chronic disease in his patients. Hear his story.

"You have a 5-inch tumor in your chest" were the words spoken from a friend and radiologist as we both stared bewildered at my chest X-ray, following a host of side effects I'd been having for weeks.

As I looked at the X-ray film in amazement, my thoughts quickly changed to frustration and anger as I realized my behaviors and actions played a pivotal role in creating my disease—non-Hodgkin's lymphoma. 

Read More