Dr. Tabatha BarberI teach women how to fast their way to a faith-filled, hormonally balanced, fabulous life!

Unlock Your Energy: The Power of Active Thyroid Hormone T3 #shorts

22 May 2026 · 1 min

Watch on YouTube

1:10

In this short, Dr. Tabatha Barber explains that free T3 is the unbound, active form of thyroid hormone that directly binds to cellular receptors, acting like a key that turns the lock on every cell. She describes how adequate T3 drives metabolism, hair growth, brain function, and regular bowel movements, essentially powering the body from head to toe. Dr. Barber criticizes the common practice of prescribing T4‑only medications such as Levothyroxine or Synthroid, noting that T4 does not bind to any cell receptors and is biologically inactive, relying entirely on the body’s ability to convert it to T3. She urges listeners to have their free T3 levels tested to ensure sufficient active hormone for optimal health.

Chapters

I want you to have the free T3 tested. That is the unbound active thyroid hormone ready to attach to your cells. So if you think about a lock and key, every single cell in your body has this perfect little lock and T3 is the key. So it inserts in, turns it, and that's what's turning on your body, turning on your metabolism, growing your hair, lighting your brain up, giving you energy every day, letting you poop every day. We need enough T3 to run your body. I always say from head to toe it runs the show, meaning the thyroid, but specifically the active thyroid hormone T3. That T4 pill that I was given, I, I like mentioning to people, especially those listening that might be on Levothyroxine, Synthroid, some kind of just T4-only therapy, that T4 medication you don't have a single receptor on any cell for T4. It is completely and totally inactive. So it's almost ridiculous to give someone T4 only and then in this day and age hope that their body is going to convert it