Have you ever wondered where dietary iodine comes from? Most people are familiar with iodized salt and shellfish containing high levels of iodine, but few realize a vast assortment of food and drinks contain this essential nutrient. What food products contain the highest levels of iodine? It may come as a surprise that most dietary iodine comes from dairy products such as milk, cheese and yogurt.…

Tags: Elements Testing, Essential Elements, Dried Urine Testing, Iodine, Thyroid Health


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Where Does Dietary Iodine Come From?

Gadolinium is a rare-earth heavy metal that most humans will have little exposure to. The designation of “rare-earth” element is misleading as it has a very common medical use: gadolinium-based contrast agents (GBCAs). GBCAs were first approved in 1988 to help make diseased tissues look brighter or darker during Magnetic Resonance Imaging (MRI). In 2017 nearly 40% of MRIs used GBCAs, and it is…

Tags: Elements Testing, Heavy Metals, Dried Urine Testing


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Gadolinium – A Toxic Rare-Earth Element That Isn’t So Rare

When getting to the root of health issues by accurate laboratory testing of hormones and other analytes, it’s important to distinguish theories from facts and make sure that our interpretation of the science is valid and corresponds with what is seen clinically. This month, as the weather and the time of year put us in the middle of winter, let’s take a critical look at a hormone sometimes…

Tags: Thyroid Health, Dried Urine Testing, Hormone Testing


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Reverse T3 – Why It’s Not Useful for Routine Thyroid Testing

Mercury is one of the most toxic heavy metals. There are numerous natural and man-made sources of mercury, but the most concerning are the ones we are exposed to daily. Mercury is known to affect the nervous, circulatory, immune, reproductive, and digestive systems, along with organs such as the kidneys, lungs, and gastrointestinal tract. Mercury primarily targets sulfhydryl groups (sulfur) and…

Tags: Dried Urine Testing, Heavy Metals, Mercury, Blood Spot Testing


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Five Common Sources of Mercury Exposure

Cadmium is a dangerous heavy metal and a known carcinogen. Even though daily exposure is usually relatively low compared to toxins like arsenic, cadmium bioaccumulates with a half-life in the body of 25-30 years. Essentially, the older you are, the more cadmium you have stored in your body. When cadmium exposure is high, it increases cellular oxidation products that deplete antioxidants like…

Tags: Dried Urine Testing, Heavy Metals, Cadmium, Fertility


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Cadmium’s Connection to Infertility and Reproduction

A couple years back, I wrote a blog about iodine deficiency in athletes resulting from excessive sweat loss. Later, while studying the kinetics of the iodine loading test which involves taking a 50-mg dose of iodine and collecting urine for 24 hours, I investigated the excretion of iodine in sweat along with urine. Surprisingly iodine levels in sweat tracked urine iodine excretion over a period of…

Tags: Dried Urine Testing, Heavy Metals, Lead, Cadmium, Arsenic, Mercury


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Is Sweating a Good Bet for Heavy Metal Detox?

Urine is rapidly becoming the preferred medium for neurotransmitter testing to ensure objective neurobiological assessment. This is because a) urine is the primary route of peripherally-produced neurotransmitter elimination, and b) it is non-invasive and cost-effective. This blog takes a look at how dried urine testing provides a superior advantage over standard liquid urine collection methods.Is…

Tags: Dried Urine Testing, Neurotransmitters


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Collection Timing Matters for Urine Testing

Lead is an incredibly dangerous heavy metal with no known beneficial use in the body. It mimics calcium, affecting all calcium-dependent biological processes, and is known to disturb the cardiovascular, renal, endocrine, and nervous systems. In children, the brain is the most sensitive target, as the blood brain barrier is less effective in children than in adults, potentially causing…

Tags: Dried Urine Testing, Heavy Metals, Lead


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Protecting Children from Lead Dust Exposure. Time for Change.

A recent news story reports that the Clean Label Project, a non-profit organization focused on health and transparency in consumer product labeling, tested 530 baby food products for toxic elements and chemicals. The results were not good. Sixty-five percent of products tested "positive" for arsenic, 36% for lead, 58% for cadmium, and the tests even showed high levels of BPA in “BPA Free”…

Tags: Toxins, Dried Urine Testing, Heavy Metals, Lead, Cadmium, Arsenic, Mercury


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Toxic Baby Food: A Look Beyond the Labels

The New York Times did a remarkable story the other day that ended with the line "When you hear hoofbeats, the chances are good that it's a horse…but we must also remember that sometimes the circus is in town." ZRT is apparently hosting the circus this year. At the odds of 3-8 individuals per million – ZRT has been instrumental in discovering two cases of pheochromocytoma tumors in the last…

Tags: Neurotransmitters, Stress, Cancer, Dried Urine Testing, Adrenal and Cortisol


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Pheochromocytoma - A Rare Condition Exposed by Neurotransmitter Testing

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