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Doctor insights on: Is The T4 And Tsh Thyroid Test The Same Thing

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Is the T4 and TSH thyroid test the same thing?

Is the T4 and TSH thyroid test the same thing?

No: Tsh is thyroid stimulating hormone, which comes from the pituitary gland. It's role is to basically stimulate the thyroid gland to make T4 and t3 (liothyronine). ...Read more

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Dr. Quang Nguyen
893 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...Read more


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This is my thyroid test results:T4:11.8/T3:1.9/TSH:0.6. Is there any thing wrong in it? Can it cause or worsen my hair loss process?My doc says it ok.

This is my thyroid test results:T4:11.8/T3:1.9/TSH:0.6. Is there any thing wrong in it? Can it cause or worsen my hair loss process?My doc says it ok.

Looks OK: Hi. Those labs look OK. No one uses total T4 anymore; is your doc old? Free T4 is a much more useful lab test. Anyway, those labs look OK. Nothing about them would worsen hair loss. ...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?

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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Can someone help please? My thyroid test score was TSH 2.06 and T4 20.6. What does it mean?

Can someone help please? My thyroid test score was TSH 2.06 and T4 20.6. What does it mean?

Check Free T4.: Hello, check a free T4 and free t4. Sometimes total T4 is higher due to binding globulins changes. Estrogen and birth control tablets may cause changes in total t4. ...Read more

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Do you need to test free T4 for an accurate thyroid test, or is TSH enough?

Do you need to test free T4 for an accurate thyroid test, or is TSH enough?

Yes: Tsh is a very good screening test for thyroid function but it's not produced by the thyroid. If your TSH is low you probably have hyperthyroidism (overactive thyroid), if it's high you probably have hypothyroidism (low thyroid function); however, other mechanisms may account for abnormal TSH levels (abnormal pituitary function). Testing your thyroid hormone levels (t3, t4) is more complete. ...Read more

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Thyroid test shows serum T3 (liothyronine) 1.81 ng/ml, serum T4 13.3 microgram% and TSH 1.80 uIU/ml. Is there any worries or is it d reason why I feel week all d time?

Thyroid test shows serum T3 (liothyronine) 1.81 ng/ml,  serum T4 13.3 microgram% and TSH 1.80 uIU/ml.  Is there any worries or is it d reason why I feel week all d time?

Thyroid tests: These tests appear to be in the normal range, but you have not provided the normal range. Hypothyroidism can cause weakness, but these tests suggest that you are not hypothyroid. Perhaps see your doctor to determine other causes. ...Read more

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Tsh 0.01, T3 (liothyronine) free 4.3 t4. Free 1.8 ? My thyroid test always normal for,years ?

Tsh 0.01, T3 (liothyronine) free 4.3 t4. Free 1.8 ? My thyroid test always normal for,years ?

Thyroid function: Hi, first I would repeat the test in couple of weeks, if the result still shows low TSH and normal FT4 and you have no symptoms then you might have subclinical hyperthyroidism, the only thing to do then is a watchful waiting and follow up with ur MD every 6 months. ...Read more

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Tsh 0.01, T3 (liothyronine) 4.3 T4 1.8 ? My thyroid test always normal for,years ? What is going on? Help please..

Tsh 0.01, T3 (liothyronine) 4.3 T4 1.8 ? My thyroid test always normal for,years ? What is going on? Help please..

It depends,,: It depends on the units of measurement used in these results, at least for the t3 (liothyronine). If it was ng/dL, then it's really low, if nmol/L, then it's somewhat high, but the other values are definitely low so there may be something going on. Whatever it might be, a visit to your doctor for discussion and a possible repeat of the tests is likely the best thing to do at this time. Best of luck. ...Read more

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I had a thyroid test last week, my TSH came back at 944, while my T4 and T3 (liothyronine) were normal. Should i be worried?

I had a thyroid test last week, my TSH came back at 944, while my T4 and T3 (liothyronine) were normal. Should i be worried?

Was it 9.44?: 944 would be extremely high number for my lab unless your lab has a different scale. 9.44 is just a little high and could be present with normal t4and t3 (liothyronine). It would be consistent with early hypothyroidism. With your other symptoms most doctors would be considering treatment. ...Read more

Dr. Hirenkumar Italia
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


Dr. David Sneid
1,375 doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid ...Read more