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Essential Thyroid Function Panel

A thyroid function assessment that measures antibodies and reverse T3 to uncover the root causes of fatigue, weight changes, and metabolic issues.

What we test

  • Selenium
  • Iodine, Serum/Plasma
  • Free T4
  • Free T3
  • Thyroid-Stimulating Hormone
  • Free T4 Index (T7)
  • T3, Uptake
  • T4 (Thyroxine), Total
  • Reverse T3
  • Thyroglobulin antibodies
  • Thyroid Peroxidase Antibodies (TPO)

FAQ

Answers to common questions about panels, results, and your plan.

Photo of Registered Holistic Nutritionist Cat Dillon RHN

Registered Holistic Nutritionist Cat Dillon RHN

I’m a trauma-informed registered holistic nutritionist, functional nutritionist, and transformational life coach helping midlife women who feel like they’re “doing everything right” but still struggling with fatigue, weight changes, digestive issues, cravings, poor sleep, hormone shifts, and low mood. I help women restore balance through holistic nutrition, nervous system regulation, mindful eating, metabolic and hormone support, and bone health strategies so they can feel strong, energized, and connected to their bodies again while supporting long-term health and healthy aging.

My website

Focus areas

  • Gastrointestinal Health

  • Mental Health

  • Metabolic Health

  • Women's Health

States of practice

  • Alabama

  • Alaska

  • Arizona

  • Arkansas

  • California

  • Colorado

  • Connecticut

  • Delaware

  • District of Columbia

  • Florida

  • Georgia

  • Hawaii

  • Idaho

  • Illinois

  • Indiana

  • Iowa

  • Kansas

  • Kentucky

  • Louisiana

  • Maine

  • Maryland

  • Massachusetts

  • Michigan

  • Minnesota

  • Mississippi

  • Missouri

  • Montana

  • Nebraska

  • Nevada

  • New Hampshire

  • New Jersey

  • New Mexico

  • New York

  • North Carolina

  • North Dakota

  • Ohio

  • Oklahoma

  • Oregon

  • Pennsylvania

  • Puerto Rico

  • Rhode Island

  • South Carolina

  • South Dakota

  • Tennessee

  • Texas

  • Utah

  • Vermont

  • Virginia

  • Washington

  • West Virginia

  • Wisconsin

  • Wyoming