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Reference Guide
ZRT Laboratory

ZRT Laboratory

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ZRT Laboratory
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About the Lab

ZRT Laboratory has pioneered innovative testing methods for hormones, neurotransmitters, heavy metals and more, offering healthcare professionals convenient testing options in saliva, dried blood spot, dried urine, and serum.

ZRT is focused on hormone and wellness testing, recognizing that hormonal imbalances are the root cause of many chronic health issues.  They aim to make lab testing easier with at-home collection methods using dried blood spot, saliva, or dried urine.

The testing information helps practitioners diagnose and manage hormone imbalances, weight management, heavy metals toxicity, stress management, breast cancer risk, neurotransmitters, cardiometabolic health, and overall wellness.

About ZRT Laboratory

Founded by breast cancer researcher David Zava, Ph.D., in 1998 in Beaverton, Oregon, ZRT Laboratory is a CLIA-certified commercial and research laboratory with over 20 years of experience.

They work with health care providers in all 50 states and in 96 countries as well as organizations worldwide, including the CDC, the NIH, and many renowned universities.

ZRT is dedicated to “providing the most accurate results with the most educated insight into their meaning.”  All test reports are comprehensive and physician-reviewed.

They provide on-call clinician support to practitioners to assist with questions, interpretation, and treatment advice.  Educational resources are also available for practitioners and patients on tests and related health issues.

The tests and testing methods employed are supported by collaborative research and knowledge from health care professionals and biochemists focusing on physiology and endocrinology.

Their laboratory testing ensures adherence to the highest standards of accuracy and use of advanced methodology, with internal and external validation controls.

Mission and Vision

Dr. David Zava, a biochemist and educator, became passionate about understanding hormones and their role in health.  His research, along with a desire to empower individuals in managing their health, led him to found ZRT Laboratory.

Dr. Zava's commitment to understanding the impact of lifestyle, environment, and genetics on hormone balance is reflected in ZRT's personalized approach to health and renowned expertise in hormone testing.

Today, ZRT is a CLIA certified diagnostic laboratory and the leader in hormone and wellness testing. They “provide accurate and meaningful test results that assist health care providers in making informed treatment decisions.”

Innovative Diagnostic Testing

ZRT Laboratory is a trailblazer in developing diagnostic tests for hormones, neurotransmitters, heavy metals, and more.  These tests are designed to be conducted on various body fluids, offering flexibility and convenience to healthcare providers and their patients. 

The tests are utilized to diagnose and manage a range of conditions including hormone imbalances, weight management issues, heavy metals toxicity, stress, breast cancer risks, cardiometabolic health, and overall wellness. 

ZRT's innovative approach extends to their test reports, which are comprehensive and reviewed by physicians, ensuring that results are accurate and meaningful.

Impact and Reach

Research is central to ZRT’s mission, with over 60 collaborations in 9 countries, primarily with academic institutions, some NIH-funded.  Their innovative testing methods are the result of extensive research and validation, keeping ZRT at the forefront of hormone-related research. 

They  offer a range of easy-to-collect sample types suited for research, including saliva, serum, capillary blood (DBS), and urine, allowing for accurate testing even in remote areas

Their collaborations extend to prestigious organizations such as the CDC, NIH, and numerous renowned universities, highlighting ZRT's significant role in global health diagnostics. 

Support and Education

ZRT provides extensive support and educational resources to both practitioners and patients.  They offer on-call clinician support to help with test interpretations and treatment advice, ensuring that healthcare providers are well-equipped to make informed decisions. 

Additionally, ZRT is committed to enhancing understanding through collaborative research, drawing on the expertise of healthcare professionals and biochemists with a deep knowledge of physiology and endocrinology.

Testing Standards at ZRT Laboratory

Certifications and Accreditations

ZRT Laboratory is CLIA-certified.

Quality Control Measures

To ensure the accuracy and reliability of its test results, ZRT implements comprehensive quality control measures including both internal and external validation controls.

Internal controls are conducted regularly to ensure that all testing processes run smoothly and accurately.  External validation involves third-party checks that confirm the integrity and accuracy of ZRT's testing methods and results.

Popular Tests Offered by ZRT Laboratory

ZRT Laboratory offers an extensive range of diagnostic tests that play a crucial role in health management and disease prevention. 

Hormonal Health Assessments

ZRT Laboratory is particularly renowned for its saliva-based hormone tests, which are pivotal in evaluating hormonal imbalances that can affect overall health. 

The Saliva Profile III offers a baseline assessment of four crucial sex and adrenal hormones plus a diurnal cortisol profile to monitor adrenal function throughout the day. 

Similarly, the Hormone Trio test measures the key hormones estradiol, progesterone and testosterone, providing essential insights into reproductive and general health.

Adrenal and Cortisol Testing

Understanding cortisol levels is vital for assessing stress response and adrenal health.  ZRT provides several tests in this area including the Diurnal Cortisol Profile, which tracks cortisol levels at four points during the day, and the Adrenal Stress Profile, which measures both DHEA-S and diurnal cortisol. 

These tests help in pinpointing issues with stress management and adrenal imbalance, aiding in the tailored treatment of stress-related disorders.

Thyroid Function Panels

Thyroid health is another area of focus for ZRT Laboratory. The Comprehensive Thyroid Profile combines blood spot and urine tests to provide a detailed look at thyroid health, integrating assessments of essential and toxic elements that can affect thyroid function. 

The Elite Thyroid Profile is a blood spot test that includes thyroid hormones, TSH, anti-thyroid antibodies, and also includes thyroglobulin and free thyroxine for a more comprehensive evaluation than simply running TSH.

Metabolic and Cardiovascular Health

ZRT also offers specialized profiles to assess metabolic syndromes and cardiovascular risks. 

The CardioMetabolic Profile uses a blood spot test to detect early signs of metabolic syndrome and screens for factors that may indicate cardiovascular disease. 

Similarly, the Weight Management Profile combines saliva and blood spot tests to identify hormonal imbalances that could contribute to obesity and difficulties in weight management.

Comprehensive Health Profiles

For a broader assessment, ZRT Laboratory provides profiles that combine various markers from different systems. 

The Comprehensive Female Profile II, for instance, assesses sex, adrenal, and thyroid hormone levels using both saliva for diurnal cortisol and dried blood spots for other hormones.  This holistic approach allows for a more detailed understanding of a patient's health, facilitating better-informed healthcare decisions.

Comprehensive List of All Tests Offered

Saliva/Blood Spot Combination Panels

Saliva Panels

Blood Spot/Dried Urine Combination Panels

Comprehensive Thyroid Profile

Comprehensive Toxic and Essential Elements Profile

Blood Spot Panels

Dried Urine Neurotransmitters

Dried Urine Steroid Metabolites

Dried Urine Diurnal Hormones

Dried Urine Elements

Dried Urine Menstrual Mapping

Serum Hormones

About the Lab

ZRT lab specializes in hormone testing, done in both blood spot and saliva. They also offer an array of other tests in bloodspot, urine and saliva.

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Quality Control Process

2 - 3 days
Shipment Tracking
Provides Tracking Number
Does Not Provide Tracking Number
Avg. Sample Processing
7 days
Consultation Availability
CLIA Certified
CAP Accredited
ISO 15189
COLA Accredited
Order, track, and receive results from 30+ labs in one place.