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Reverse T3

Reverse T3 (rT3) is an inactive form of the thyroid hormone T3 that is produced under stress or illness when the body converts T4 into rT3 instead of active T3. It is used to assess thyroid hormone conversion efficiency and may help identify non-thyroidal illness or functional hypothyroidism.

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Answers to your questions about lab testing and services.

Photo of Dr. Emmanuela Guillaume

Dr. Emmanuela Guillaume

Chiropractic Acupuncturist & Functional Medicine Practitioner who blends Western Medicine with holistic Traditional Eastern approaches & techniques.

My website

Focus areas

  • Immune Health

  • Musculoskeletal Health

  • Endocrine / Hormonal Health

  • Women's Health

States of practice

  • Missouri