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Doctor insights on: Thyroid T4 Level

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Dr. Debra Rosenblatt
13 Doctors shared insights

Thyroid (Definition)

The thyroid is an endocrine gland that sits in the lower part of the neck. It produces thyroid hormone - which ...Read more


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Just had a blood test that showed Thyroid level: T4 1.9 TSH 0.07. Have appt. With endo in 3 weeks am very worried. What does this mean? Graves disease

Just had a blood test that showed Thyroid level: T4 1.9 TSH 0.07. Have appt. With endo in 3 weeks am very worried. What does this mean? Graves disease

Hyperthyroid: It appears that your FT4 is high, and TSH low, which indicates hyperthyroidism. And it appears you have symptoms (palpitations? Sweating? tremor?). Graves disease is the most likely cause. Don't worry. This can be controlled and treated, usually starting with medications (eg. methimazole, b-blocker) and then you should discuss radioactive iodine with your endocrinologist. ...Read more

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I have hashimito's thyroidism, hypothyroidism, what foods should I avoid? Am taking T4 50mg during the week, T4 75mg at weekends. Thank you.

I have hashimito's thyroidism, hypothyroidism, what foods should I avoid? Am taking T4 50mg during the week, T4 75mg at weekends. Thank you.

Coffee with pills: Coffee decreases the absorption of T4, so don't drink coffee when you are taking your medicine. Otherwise, no dietary restrictions ...Read more

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We have case, femal patien, age 60 years, the TSH less than 0.05 while T4 in normal range, and she has not any symptom of thyroidism, is it ok?

Subclinical hyperthy: A low TSH with a normal T4 and no symptoms is usually subclinical hyperthyroidism. She may have a multinodular goiter that is autonomously functioning, or very early graves disease. A T3 (liothyronine) level and free T4 level should be checked. There is a higher risk of developing atrial fibrillation despite the normal T4 level, but many endocrinologists would just follow her levels for progression. ...Read more

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If my tsh low, t3 (liothyronine) and t4 is normal, is it hypo or hyper thyroidism? Should I take iodine? Ultra sound is normal, without pathology.

If my tsh low, t3 (liothyronine) and t4 is normal, is it hypo or hyper thyroidism? Should I take iodine? Ultra sound is normal, without pathology.

Hypothyroid: The answer to this question depends on what your exact levels are and what type of symptoms you have. "Subclinical Hypothyroidsim" sometimes presents in the manner you describe. ...Read more

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Which levels of TSH and T4 indicate a thyroid problem?

Which levels of TSH and T4 indicate a thyroid problem?

Tsh less<o.4&>4.0T4&: Tsh level less than 0.4 or more than 4.0 t4 level less than4.5 and more than 11.2microgrms. ...Read more

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Are thyroid levels normal TSH. 278 T4. 9 T3 (liothyronine) 72?

The tsh: Is low and should be repeated along with a free t4. The other two tests (T4 and t3) are not useful. Discuss with your doctor. ...Read more

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What is normal level of TSH and t4? What is more dangerous between the two? Which indicates thyroid level?

What is normal level of TSH and t4? What is more dangerous between the two? Which indicates thyroid level?

They are: Evaluated together. When one goes up the other responds to go down in the normal state. Neither is "more " or less "dangerous". Units used are determined by the lab that performs the test. ...Read more

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My TSH level is 150 and T4 libre is 0.10ng/dL. What kind of Thyroid is this hypo or hyper?

My TSH level is 150 and T4 libre is 0.10ng/dL. What kind of Thyroid is this hypo or hyper?

Hypothyroidism: This is hypothyroidism, and if these are SI units it is pretty significant, I recommend that you see you doctor for thyroid replacement as soon as possible. ...Read more

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My T4 levels were low (3.8) but my TSH levels (1.95) were normal. Is my thyroid test normal?

My T4 levels were low (3.8) but my TSH levels (1.95) were normal. Is my thyroid test normal?

Likely: All lab results need to be interpreted in the clinical context and the doctor who ordered the test is usually in the best position to do that. The info you provided does not suggest a thyroid disorder. ...Read more

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My baby had a thyroid test at 2 weeks. .. his t4 levels r 9.06 slightly below normal and tsh levels r normal. Is it something concerning?

My baby had a thyroid test at 2 weeks. .. his t4 levels r 9.06 slightly below normal and tsh levels r normal. Is it something concerning?

No: There can be quite a bit of variation in free t4 levels in the first month of life, but values of t4 below 7.0 with TSH over 40 are highly suggestive of congenital hypothyroidism, which requires thyroid intervention to provide normal mental and physical growth. Your infants values are well above that. Close monitoring of growth should be reassuring, but your doctor may choose to repeat values. ...Read more

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I have a TSH level of 1.16 and a T4 free level of 1.2. Is it possible to have a thyroid disorder when these tests are in normal range?

Yes, but: It's possible to have a disorder of structure, like nodules or goiter -- but the function is normal, at least for now. ...Read more

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My thyroid levels were checked just recent and my TSH was 2.08 and my T4 was 14. Could this be causing the anxiety feeling? What is protocol?

My thyroid levels were checked just recent and my TSH was 2.08 and my T4 was 14. Could this be causing the anxiety feeling? What is protocol?

TBG: Total T4 isn't a very useful test. Any female taking birth control pills, for example, could have an elevated T4 because thyroid binding globulin might increase. A free T4 would be much more helpful. With a normal tsh, it isn't likely that you're hyperthyroid. Elevations in thyroid hormone levels should suppress TSH in people with primary hyperthyroidism. ...Read more

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My TSH levels are normal, my T4 is almost low? What could this mean? I have 3 hyperechoic nodules on a diffused thyroid. Size. 09 to 1.5 CM.

"almost" low: Means normal, so stop worrying about your lab values. Your nodules, on the other hand, need someone to evaluate your clinical parameters and ultrasound carefully and decide whether you need to have a thyroid biopsy. ...Read more

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I have a TSH level of 1.34 & T4 free level of 1.43. Is it possible to have a thyroid disorder when these tests are in normal range? I have 57 yr old

Yes: You can have normal thyroid tests and have a colloid cyst --euthyroid. If you do have a mass in the thyroid region it needs to be checked by a dr. ...Read more

Dr. David Sneid
1,406 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more