Question 1

what does high t4 level mean?

Accepted Answer

It can mean: An elevated level of thyroid hormone, either due to hyperthyroidism or thyroid inflammation. It can be falsely elevated by estrogen therapy. Other thyroid tests are more reliable. The T3 (liothyronine) you're receiving is potentially dangerous and should not be taken. It can not me measured in the blood and has potential toxicity. Use brand name T4 only if replacement is required, .

Question 2

why is my t4 level extremely elevated?

Accepted Answer

You could have : Overactive thyroid function.  Or you could be on the incorrect dose of thyroid replacement.

Question 3

is a t4 free level of 1.24 high or low?

Accepted Answer

Looks normal: Assays for ft4 differ, but this appears to be about normal.  Check with your doctor.

Question 4

what does it mean when my t4 level is 12.3?

Accepted Answer

Nothing: alone nothing it all depend what your TSH was

Question 5

what could cause my t4 levels to be very low?

Accepted Answer

Depends: Depending on the type of assay - free T4 or an index (that might be low because of binding problems unrelated to thyroid function). Most of the time a true low T4 is due to an underactive thyroid. Rarely the pituitary that controls the thyroid may be low.
See a thyroid doctor.

Question 6

is it true that levothryroxine increase t4 level?

Accepted Answer

Confusing question: Levothyroxine IS ALSO CALLED T4. It can be made by the body or synthetically to treat thyroid problems. It is converted in the body to T3 (triiodothyronine) which is the active form which performs the hormones functions. When given in excess it can create problems from that excess. It is usually used to replace the hormone when the gland does not make sufficient amounts.

Question 7

could you have high total t4 levels but have normal free t4 levels?

Accepted Answer

Yes: Total T4 reflects T4 bound to proteins in your blood. Free T4 measures the amount of T4 that is free and not bound so that it can be metabolically active. Thus women taking Estrogens (as in bc pills) have elevated levels of thyroid binding globulin and elevated total t4, but normal free t4.

Question 8

what is the normal t4 and tsh levels in infants?

Accepted Answer

Tsh &gt; 40 mU/L: All infants with a low T4 concentration and a TSH concentration greater than 40 mU per L are considered to have congenital hypothyroidism and should have immediate confirmatory serum testing. Replacement levothyroxine (LT4) treatment should be initiated as soon as confirmatory samples have been taken, without waiting for the results

Question 9

which things in your diet could lower your thyroxine (t4) levels?

Accepted Answer

Unfortunately...: Nothing really lowers your T4 levels. This is why medications and sometimes surgery are needed to treat hyperthyroidism.

Question 10

high tsh levels but normal t4 levels, i don't understand what this means?

Accepted Answer

Early hypothyroidism: If the elevated TSH persists, it generally indicates early hypothyroidism, which can easily be diagnosed and treated by your doctor.

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Doctor answers about:

What should my t4 level be

A member asked:

What does high t4 level mean?

A member asked:

Why is my t4 level extremely elevated?

A member asked:

Is a t4 free level of 1.24 high or low?

A member asked:

What does it mean when my t4 level is 12.3?

A member asked:

What could cause my t4 levels to be very low?

A member asked:

Is it true that levothryroxine increase t4 level?

A member asked:

Could you have high total t4 levels but have normal free t4 levels?

A member asked:

What is the normal t4 and tsh levels in infants?

A member asked:

Which things in your diet could lower your thyroxine (t4) levels?

A member asked:

High tsh levels but normal t4 levels, i don't understand what this means?

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