YOUR LAB of CHOICE
OVER 10 MILLION TESTS COMPLETED WORLDWIDE
ZRT was first to commercialize dried blood spot testing to accurately monitor hormone therapy.
Hormones are complex. They’re produced throughout your body by nearly a dozen glands and organs, and are collectively known as the endocrine system.
When in balance they interact in an elegantly intricate formula — a mix that determines growth, development, mental function and physical function at every age. When they’re out of balance, growing evidence shows that it can cause anything from fatigue to infertility, headaches to depression, weight gain to loss of libido.
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Since the beginning, ZRT has maintained a singular focus: helping people get and stay healthy.
With 20 years of experience and results from over 11 million tests, ZRT Laboratory is a recognized leader in innovative, safe, and meaningful hormone and wellness testing. Individuals, health care providers in all 50 states and 96 countries, and research teams worldwide use our tests, including the Centers for Disease Control and Prevention, the National Institutes of Health and many renowned universities.
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Pam Smith, MD, MPH, MS
“I have been very happy with ZRT laboratory. The results are reproducible time after time, and if the practitioner has any questions the company is very available to answer them. I would highly recommend using this laboratory.”
Lena Edwards, MD
“Dr. Zava and his team are always on the cutting edge of new research, setting the precedent that others must follow. I could not be happier with ZRT and will continue to use them as the only true option for legitimate diagnostic testing that sets the highest standards in the industry.”
Jack Monaco, MD
“Saliva testing has been the ‘Gold Standard’ to measure topically applied hormones for the past 25+ years. ZRT laboratory is the ‘Gold Standard’ for accuracy and consistency in salivary hormone testing.”
Jim Paoletti, Pharmacist
“No other lab in the world has reference ranges that are based on over a million patient results or offers results that relate better to clinical symptoms. And their integrity is above question - the absolute highest in the industry.”
ARE MY HORMONES OUT OF BALANCE?
Evidence shows that hormonal imbalances are the root cause of many chronic health issues.
HOW TO COLLECT YOUR SAMPLE
View short videos or download instructions that show how to collect your samples.
HORMONE EDUCATION RESOURCES
Comprehensive educational materials for practitioners and patients about ZRT’s innovative testing.