Thyroid Hormones and Tests: Why You Need a Full Thyroid Blood Panel

A full thyroid blood panel is the best way to check your thyroid levels and determine whether you might have a thyroid condition. The signs and symptoms of hypothyroidism and hyperthyroidism can vary greatly. It's always a good idea to get checked out by a physician if you feel like something is off. It is also worth taking a look at your thyroid hormones in the context of the Hypothalamus- Pituitary- Thyroid (HPT) axis.

Thyroid Hormones

There are several thyroid hormones that the thyroid gland produces: 

  • T1
  • T2
  • T3
  • T4
  • Calcitonin

Full Thyroid Blood Panel

A full thyroid blood panel consists of: 

  • Free T3  (active thyroid hormone)
  • Free T4 (inactive thyroid hormone, which is in the thyroid medication Levothyroxine or common brand name Synthroid)
  • Reverse T3 (an inactive variant of T3 hormone that could be a contributing factor to ongoing symptoms)
  • TSH (thyroid stimulating hormone)
  • Thyroglobulin Antibodies (Tg) (helpful in identifying conditions like Hashimoto's Thyroiditis and important in ongoing monitoring of thyroid cancer)
  • Thyroid Peroxidase Antibodies (TPOAB) (helpful in identifying antibodies in your blood and identifying autoimmune conditions like Hashimoto's Thyroiditis)

At the minimum, it is important that you get Free T3, Free T4 and your TSH levels checked to identify that there are no conversion issues and that your thyroid levels are within the optimal ranges.


Sign up for the free monthly Thyroid Resource Round-Up for valuable resources and support!

"Freedom From Thyroid Fatigue" - a comprehensive, 6 week step-by-step online course.

Are you interested in sharing your chronic illness story? We'd love to hear from you!

If you found this article helpful, please take a moment to share it in any way using the buttons below! Together, we can raise awareness of what it’s like to live with a chronic illness and explore what it means to reclaim our minds, bodies and lives.

The following two tabs change content below.

Nadha Hassen

Founder at Thyroid Transitions
Nadha is a health researcher and chronic illness advocate based in Toronto. A "thyroidless thriver", she strives to support people at all stages of their thyroid process. She is currently a PhD student and received her Master of Public Health (MPH) from the University of Toronto, specializing in Health Promotion.
Posted in Thyroid Health Info.

Leave a Reply

Your email address will not be published. Required fields are marked *