The ZRT Laboratory Blog

In today’s scary world of rapidly spreading COVID-19 infections, most individuals are hesitant to have their health care provider, or worse, a stranger at a blood draw clinic, violate their mandated social space of 6 feet to allow them to stick a needle in their vein and draw blood for testing hormones. It is understandable why during the…

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In 2002 several large-scale clinical studies were published on the risks of breast cancer in postmenopausal women using conventional FDA-approved hormone therapy. These were the Women’s Health Initiative (WHI) and Million Women’s studies of women using FDA-approved estrogens and progestogens in the United States and Great Britain, respectively. Both studies came to the same conclusion – that…

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Delivery of the bioidentical hormones estradiol (E2), progesterone (Pg), and testosterone (T) through the skin as a cream or gel (topically) has become a mainstay of bioidentical hormone replacement therapy (BHRT) for women and men. A plethora of FDA-approved pharmaceuticals, compounded, and even over-the-counter topical BHRT products are available. The popularity of these products lies not only…

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After an extensive and careful review of test results over the past year, the scientists and clinical consultants at ZRT have concluded that the monoamine metabolites ZRT includes as part of its panel of 14 neurotransmitters are essential for the best and most comprehensive interpretation of test results. We've determined that while looking at a more limited range of seven to nine neurotransmitters…

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Practice Takeaway: Providers should be aware that three different body fluids – saliva, blood or urine – can be used to assess adrenal gland function, and should know each method’s advantages and disadvantages, when deciding how to test patients. Inadequate or excessive production or disrupted circadian patterns of cortisol synthesis by the adrenal glands in response to stressors can eventually…

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I began the study of iodine because I believe it has benefits to human health. As a breast cancer researcher I believe that iodine protects the breasts and uterus against toxic and mutagenic estrogen metabolites that form in some people more than others. Thus, choosing the most reliable test to a) determine iodine status, and, b) supplementation to maintain levels seen in populations with lowest…

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An FDA-approved testosterone gel was shown to significantly increase risk for adverse cardiovascular, respiratory, and dermatological events in men 65 or older who had impaired mobility and increased health risks. This is according to a recent study published in the prestigious New England Journal of Medicine (NEJM) that casts a shadow on the common use of testosterone therapy in older men for…

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Editor’s Note: After the publication of Dr. David Zava’s last Health Watchers News and Views post, Hormone and Breast Cancer: the Latest Findings from the WHI, he received an attacking comment from a doctor who has been making claims for years that natural progesterone has the same effects as the synthetic progestins. Although, as an editor, I do not publish comments that attack, Dr. Zava wrote an…

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