Urine Tests

ZRT Laboratory uses dried urine for testing both essential and toxic elements that have a significant impact on health.

Iodine is an essential component of T3 and T4, so its deficiency reduces thyroid hormone synthesis, while bromine in excess competes with iodine in the thyroid. Selenium is essential for intracellular conversion of T4 to T3. Arsenic and mercury reduce selenium’s bioavailability and disrupt thyroid health, while arsenic, mercury, and cadmium represent 3 of the 4 most toxic heavy metals according to the CDC and are extremely hazardous to health. 

Urine dried on filter paper produces results nearly identical to liquid urine, but has clear advantages in sample transport, size and stability compared to typical 24-hour urine collections. Dried urine tests are also available for steroid hormone metabolites.

zrt package urine

Profiles we offer in the Urine test kit:

Profiles we offer in the Urine/Blood Spot Combo test kit: 

    • Comprehensive Thyroid Profile
      zrt package bloodurine(Dried Urine: Iodine, Bromine, Arsenic, Selenium, Cadmium, Mercury, Creatinine)
      (Blood Spot: Total T4, Thyroglobulin, Thyroid Stimulating Hormone, free T3, free T4, TPO)

    • Comprehensive Elements Profile
      (Dried Urine: Iodine, Bromine, Arsenic, Selenium, Cadmium, Mercury, Creatinine)
      (Blood Spot: Mercury, Cadmium, Lead, Zinc, Copper, Selenium, Magnesium)


Profiles we offer in the Saliva/Urine Combo Kit:


  • Any combination of Saliva and Dried Urine Profiles, such as
    (Female/Male Saliva Profile III + Elements Profile)
    (Female/Male Saliva Profile III + Iodine)



Informational webinar on thyroid health and environmental toxins Presenters: David Zava, PhD and Ted Zava



Customer Service is available at 866.600.1636 for more information or to place your order.