Total T4

MeasuredUseful

All the main thyroid hormone in your blood, bound and free.

Largely superseded by free T4 for the same reason.

Part of

How we rate it — Useful

Worth doing for a specific reason — a risk factor, a symptom, an age group.

This rating and the description above were written against published screening guidelines by someone who is not a clinician, and are awaiting review by one. We would rather say that than imply an authority we do not have.

Check-ups that include it

In 41 of the 78check-ups we track — 53%. Cheapest first.

and 29 more.

Also sold as

Every one of these names refers to this same test. Resolving them to one canonical entry is what makes an honest comparison possible.

t4 · t4 total · t4 total thyroxine · thyroxine · total t4 · total thyroxine

Information here is for comparing packages, not for diagnosing yourself. Talk to a doctor about which tests you actually need.