08/24/2026
Your TSH can look “normal” while your thyroid function still isn’t optimal.
Dr. Wilcox emphasizes: Free T3 deserves serious attention because T3 is the active thyroid hormone your cells actually use.
TSH is a signal from the brain to the thyroid. Free T3 gives us a different piece of the picture—how much active thyroid hormone is circulating and available to tissues.
That’s why looking at TSH alone can miss important context.
A more complete thyroid evaluation may include:
TSH + Free T4 + Free T3 + thyroid antibodies + symptoms
Treat the patient, not one number on a lab report. 🧬