Our Clinical Consultants

Experienced clinicians to answer health care provider questions is another benefit of working with ZRT Laboratory.

Our docs are available Monday through Friday 9:00am - 5:00pm – free of charge – to answer questions including who to test, when to test, how to interpret our results and how to handle your most challenging hormone cases.

Call a ZRT Clinical Consultant today 866.600.1636


Alison McAllister, ND

Dr. Alison McAllister is the lead clinical consultant for ZRT. She sees patients in her own practice several days a week, and has worked with ZRT for over 15 years – helping hundreds of doctors understand hormone balance and the role that hormones, neurotransmitters and elements play in overall health. She is an expert in thyroid function, fertility and PCOS. In addition, Dr. McAllister also regularly lectures for groups such as the A4M and PCCA at industry conferences. 



Sherry LaBeck, ND

Dr. Sherry LaBeck has been with ZRT for over 12 years. Prior to being a clinical consultant she taught at the National University of Naturopathic Medicine in Portland OR and the Southwest College of Naturopathic Medicine in Tempe AZ. Her mission is to continue to expand education about hormones for health care providers around the country.




Allison Smith, ND

After completing her N.D. at the National University of Naturopathic Medicine in Portland, Oregon, Dr. Allison Smith worked in private practice focusing on primary care, women’s health and dermatologic laser therapy. Since joining ZRT Laboratory’s Clinical Consultant team, her focus has shifted to fostering the medical field’s understanding of safe hormone therapies, sharing integrative approaches to health, and assisting in dissecting tough cases.



Katrina Wilhelm, ND

Dr. Katrina Wilhelm is an experienced clinical consultant and lecturer with expertise on the HPA axis, hormones, and the role environmental exposures play in cardiometabolic and endocrine disorders. Previously, as the Medical Director for a nutraceutical company, she developed numerous clinical protocols and acted as the primary product formulator. Dr. Wilhelm maintains an international private practice specializing in anti-aging metabolic medicine. 


Call a ZRT Clinical Consultant today 866.600.1636

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