FT3

Also known as: Free T3; T3

Formal name: Triiodothyronine

Related tests: TSH; FT4; thyroid antibodies

At a Glance

Why Get Tested?

To help diagnose

When to Get Tested?

If you get an abnormal TSH or FT4 result

Sample Required?

A blood sample taken from a vein in the arm

This article was last reviewed on March 6, 2010. | This page was last modified on July 31, 2010.

The review date indicates when the article was last reviewed from beginning to end to ensure that it reflects the most current science. A review may not require any modifications to the article, so the two dates may not always agree.

The modified date indicates that one or more changes were made to the page. Such changes may or may not result from a full review of the page, so the two dates may not always agree.

This website is certified by Health On the Net Foundation. Click to verify.

We comply with the HONcode standard for
trustworthy health information.
Verify Compliance.

Produced by