Here at ZRT, we clinicians are always reading. When we aren’t on the phones or completing laboratory reports for you, we are constantly researching and reading. We read everything from the books that some of you are writing to articles on Pubmed and Medscape. We thought that it might be fun to tell you what is currently on our reading agenda.…

Tags: ZRT Laboratory, Research


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What the ZRT Docs Are Reading

Testosterone, so meaningful to a man’s behavior, is the evolutionary force behind everything intrinsically “male.” Historical stereotypes peg testosterone as the macho elixir of legendary magnitude – the “chest-thumping hormone of aggression.” New research, however, is beginning to tease out previously unknown subtleties of testosterone’s effects on behavior. Testosterone is non-trivial for…

Tags: Testosterone, Research


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New Study Links Testosterone & Desire For Luxury Goods

One of the primary objectives of the Women's Health Initiative was to see if postmenopausal hormone replacement therapy (HRT) improved long-term risk of coronary heart disease, among other chronic diseases. However, the combined estrogen/progestin (Prempro) arm was halted in 2002, citing that the participants’ risk of cardiovascular disease outweighed any potential benefit of HRT in the prevention…

Tags: Hormone Balance, Menopause, BHRT, Research


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Research Updates – Trials of HRT Started in Early Menopause

Quality testing is a vital component of a physician's evaluation of a patient with a view to successful treatment. But how can health care providers ensure that the lab they are working with is giving them the quality they need? We’re often asked "Why should I partner with your lab? What distinguishes you from the others?" While many providers are expecting the obvious answers like fair prices and…

Tags: Research, Laboratory Quality


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Your Checklist for Partnering with a Quality Lab

I wanted to share a few of the studies using saliva testing that were published in the literature in 2016. Just a hint, if you want to search for articles on saliva testing, use pubmed.gov and search saliva estradiol (or progesterone, testosterone etc.). Be aware that saliva hormone testing is so standard in the research world that rarely is it mentioned in the titles of the papers. Over 310…

Tags: Saliva Testing, Research, Estrogen, Testosterone, Progesterone, DHEA, Adrenal and Cortisol


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A Year of Saliva Testing in Research

I have to admit, I believe that "research" is one of those words that I think is often misused today. I started my own career in a cancer research lab, continued it in a pharmaceutical company research lab, and then got into medical information research and scientific writing, which meant using a range of medical literature databases and complex searching strategies. My early research career was…

Tags: Research, Laboratory Quality


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Research Puts the "R" in ZRT

CLIA-certified testing laboratories such as ZRT are required to provide reference ranges as an aid to interpretation of test results. Ideally, reference ranges provide the expected range of values for a healthy population. When methodology and equipment is identical for testing a particular analyte among different laboratories, reference ranges for that analyte should be the same. However, when…

Tags: Dried Urine Testing, Saliva Testing, Blood Spot Testing, Research


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How Reference Ranges Determine a "Normal" Lab Test Result

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…

Tags: Hormone Balance, Thyroid Health, Research


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

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…

Tags: Hormone Balance, Thyroid Health, Research


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

Two vitamin D studies were published recently, both utilizing ZRT's testing in dried blood spot. Dried blood spot samples are well suited for research applications because they are equivalent to serum but have the advantage of ease of sample collection, shipping, and storage, which doesn’t require any refrigeration or biohazard labeling. Also, samples are easily identified by details that can…

Tags: Hormone Balance, Vitamin D, Research, Blood Spot Testing


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New Research on Vitamin D Using Dried Blood Spot Testing

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