For A Better Life


Key Facts About ZRT

  • Over 8 million tests completed
  • Operating for over 20 years
  • Developed three distinct hormone testing methods
  • Performs testing for over 4 000 health-care providers in 96 countries and all 50 states
  • Partners with the CDC & NIH on research

ZRT is the only specialty hormone laboratory to have qualified for the CDC’s Hormone Standardization Program (HoSt) — meaning that ZRT has successfully passed the performance criteria to qualify for the CDC Testosterone Reference Method and the CDC Estradiol Reference Method.

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