In this interview with Dr Kara Fitzgerald, Dr. Mark Newman covers the various specimen type and their respective utility and limitations, and the unique characteristics of the DUTCH test….

What you’ll learn in this podcast:

  1. Review of the different specimen for hormone testing- limits and advantages to serum, urine and saliva.
  2. The “eureka” of developing the DUTCH test. Why 4-point urine measurement for hormones (reproductive and adrenal) is a good idea for:
    • The obese patient
    • The hyper or hypothyroid patient
    • PCOS
    • Estrogen metabolites
    • Tracking diurnal cortisol output- advantages over salivary
  3. Assessment of hormone replacement therapy using urine, saliva and serum.
  4. Conditions when this test shouldn’t be considered


Mark Newman, Owner and President of Precision Analytical

Mark is a recognised expert and international speaker in the field of hormone testing. He has assisted many laboratories in developing novel tests to create world-class laboratory testing. He has also educated thousands of providers about hormone monitoring best practices.

Precision Analytical (dutch testing) was established by Mark to address the need for better clinical accuracy, subsequently developing one of the most advanced and comprehensive models for testing a patients steroid and adrenal hormones.

Dr Joseph Mercola, Dr Sara Gottfried, and Chris Kresser are just a few of the international experts that have found the dutch model to be the most advanced test for hormone testing.