Free T3 (fT3)

Free Triiodothyronine (fT3) is one of the two primary thyroid hormones, playing a crucial role in regulating metabolism, heart rate, and body temperature. Unlike total T3, fT3 represents the unbound hormone available for immediate use by the body, making it a critical indicator of thyroid function.

Free T3 (fT3)

Content

gettested sidebar

Who would benefit from testing their fT3 levels?

Individuals with symptoms of thyroid imbalance, such as fatigue, weight changes, or mood swings, should test their fT3. It’s also crucial for those being treated for thyroid disorders to monitor treatment effectiveness.

What are symptoms of low or high fT3?

Imbalanced fT3 can cause symptoms like unexpected weight loss or gain, heart rate irregularities, temperature sensitivity, anxiety, and fatigue.

How does free T3 differ from total T3 in thyroid testing?

Free T3 measures the unbound, active form of the hormone, while Total T3 includes both bound and unbound hormone. Free T3 provides a more accurate picture of the hormone readily available for use by the body.

What do abnormal free T3 levels indicate?

High fT3 levels can indicate hyperthyroidism, while low levels may suggest hypothyroidism. It’s important in understanding thyroid gland activity and overall metabolism.

Test(s) that measure/test for Free T3 (fT3)

Thyroid Test TSH fT3 & fT4
3 items
Lab TestBlood

Thyroid Test TSH fT3 & fT4

GetTested’s Thyroid Test TSH, fT3, & fT4 provides an analysis of crucial thyroid markers to help you understand the thyroid gland's impact on ...
€ 79,00 Add to cart

Trusted by over 10.000+ customers

gettested trustpilot
Richard

“The home test was straightforward with easy to follow instructions. The test result was detailed and clear in its presentation. Also had the opport...”

Richard

Natasha

“We looked at a lot of companies offering the same services but made the decision to go forward with get tested because the labs are based here in t...”

Natasha

Alan

“There are other providers out there, I have tried 3. Gettested was the fastest and the customer service was the best. I even received my test on th...”

Alan

E

“Absolutely perfect, results came after few days and finally after a lots of times visited GP, we finally know why my son has eczema - he is allergy...”

E

Eileen

“I found them to be professional and not too long a wait for results. Helpful with any after questions. Will be using them again if need be. I highl...”

Eileen

Des

“I really value my test and to see the results. It is a jungle when your health is online. So get accurate and precise knowledge is a gift, as it is...”

Des

call to action
call to action line graphic

Still not sure what you need?

Let our experienced team of nutritionists, medical experts, health coaches guide you.

Contact Us