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.

Five Common Sources of Mercury Exposure

Posted by Ted Zava on Friday, 27 July

177551726_fillings

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 selenium, for which it has a high affinity. Later in this blog is a list of the most common sources of mercury exposure, but before we get into that, it is important to distinguish the three different types of mercury and their common exposure routes.

Read More

Cadmium’s Connection to Infertility and Reproduction

Posted by Ted Zava on Thursday, 14 June

couple.with.fertility.test

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 glutathione peroxidase and superoxide dismutase, rendering the body defenseless to further oxidative damage [1].

The most common sources of cadmium exposure are green leafy vegetables and grains, as cadmium is accumulated from contaminated water and soil. Thus, people consuming plant-based diets may be at a higher risk for cadmium exposure. Tobacco, a green leafy plant, concentrates cadmium, which is then highly absorbed through the lungs when smoked, resulting in blood cadmium levels 3 times higher than in non-smokers [2]. In comparison, only a small percentage of cadmium is absorbed in the gut from food. Other sources of cadmium include industrial activities such as smelting and refining, mining, and manufacturing of batteries and cadmium-containing pigments. 

Read More

Is Sweating a Good Bet for Heavy Metal Detox?

Posted by Ted Zava on Thursday, 08 March

ThinkstockPhotos-804940320_sm.jpg

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 3 days. The goal was to show that the loss of iodine through sweat can represent a significant portion of the 50-mg dose, something the creators of the Iodine Loading Test had not accounted for.

Read More

Collection Timing Matters for Urine Testing

Posted by Dr. Kate Placzek on Friday, 02 March

ThinkstockPhotos-77741160.jpg

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.

Read More