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Doctor insights on: Low T4 Thyroid

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Low TSH Borderline low T4 normal t3 (liothyronine). Thyroid uptake scan..low uptake noted w\o nodules. Radiologist said HYPOTHYROIDISM?! All other possible test norm

Low TSH Borderline low T4 normal t3 (liothyronine). Thyroid uptake scan..low uptake noted w\o nodules. Radiologist said HYPOTHYROIDISM?! All other possible test norm

Need follow-up: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, there is inconsistency in your results. Both TSH and T4 being low does not add up. You may need to repeat the lab tests, not necessarily the scan, in about 6 months to see what direction these results are going in. ...Read more

Dr. M. Hytham Beck
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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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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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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I had bloodwork done for my thyroid and was told my T4's were extremely low. What does that mean?

I had bloodwork done for my thyroid and was told my T4's were extremely low. What does that mean?

Hypothyroidism: Low T4 is an indication of the thyroid gland not producing enough thyroxine hormone which is necessary for overall body metabolism. Need further work up as to why your T4 is low. Will ultimately need thyroxine replacement therapy. Symptoms of fatigue , constipation, dry skin, weight gain and hair loss will continue without thyroxine replacement. ...Read more

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What is brand name T4 replacement? Is that a name brand of mmedication for low thyroid?

What is brand name T4 replacement? Is that a name brand of mmedication for low thyroid?

Yes.: When providers say brand name they are often referring to synthroid. Some folks still debate the reliability of generic levothyroxine. Personal opinion: use the one that fits you best. If you change manufacturers check a level. ...Read more

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I'd routine check of my thyroid and TSH is low but T3 (liothyronine) and T4 are in normal range.Should I be worried?What can I do to help besides the doc? Food?Supl?

I'd routine check of my thyroid and TSH is low but T3 (liothyronine) and T4 are in normal range.Should I be worried?What can I do to help besides the doc? Food?Supl?

Depends/check ups,,,: It depends on how low TSH was and where the other labs are in the normal range. If TSH was very low and the others were getting toward the elevated levels, then it'd be a good idea to talk to your doctor about steps to correct a possible hyperthyroidism issue, of not or if they were all getting toward the low side, then supplements might be needed. Regular check ups and Dr. visits help. ...Read more

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Having nausea, fatigue, dry skin, etc. Had thyroid test TSH 4.290& T4 1.15 & ferritin 5, hemoglobin 9.6, vitamin d 11. Would low dose thyroid med help?

Having nausea, fatigue, dry skin, etc. Had thyroid test TSH 4.290& T4 1.15 & ferritin 5, hemoglobin 9.6, vitamin d 11. Would low dose thyroid med help?

Anemia and vitamin: D deficiency. All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, you are deficient in iron and vitamin D and likely deficient in other nutrients as well. It is imperative that you see your doctor for a thorough evaluation. In meantime - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. ...Read more

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I have thyroid problem with elevated TSH and low t4. What do you suggest?

Hypothyroid: Your situation sounds like an under active thyroid however the cause is unclear mostly permanent requiring lifelong replacement before starting this routine confirm it is not a self limited condition which is less common check with md also helped by checking tpo levels. ...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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My TSH is a little low. T4 is a little high. I can't take the thyroid meds. Will a partial thyroidectomy help? (feeling very sick)

Possibly.: If you can't take thyroid meds, surgery or radioactive iodine ablation are useful. In fact radioactive iodine ablation is effective, with 40-70% of patients becoming hypothyroid after its administration. You might want to just observe since your T4 and your TSH are only slightly high and low respectively, and you might still have normal function. It would be best to see your doctor to decide. ...Read more

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I have a 1.6cm single vascular nodule right lobe of thyroid. It is 16x15x7mm, hypoechogenic,curcumscribed, front of neck has pain. T4 low biopsy?

I have a 1.6cm single vascular nodule right lobe of thyroid.  It is 16x15x7mm, hypoechogenic,curcumscribed, front of neck has pain.  T4 low  biopsy?

FNA biopsy: Hi. TSH would be more useful than a T4, but I can surmise it's NOT a hyper functioning nodule from the low T4, and hyper functioning nodules are the only ones at no risk of being cancer. You need a fine needle aspiration (FNA) biopsy with gene testing. Let me guess...that's what your doc told you! She/he is right! Get it done. They're not bad at all ( know it seems creepy!). Odds are in your favor ...Read more

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What does low T4 and low TSH signify on a thyroid test?

What does low T4 and low TSH signify on a thyroid test?

Need more info: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, it would have helped to have the actual values rather than your interpretation of the results. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex, if you have sex. ...Read more

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Dear sir, it is not good to take only T3 (liothyronine) for low thyroid? And why you prefer T4 ?

Dear sir, it is not good to take only T3 (liothyronine) for low thyroid? And why you prefer T4 ?

T3 (liothyronine) or T4: T4 is the major thyroid hormone in the blood and a small fraction is also converted to T3 (liothyronine). T4 is preferred. Adding T3 (liothyronine) tablets adds more cost and limited extra value. Sometimes T3 (liothyronine) is necessary but not often. ...Read more

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Normal TSH but low free t4? Whats th3 difference between these 2 test? Do I have a thyroid problem?

Reproducible?: Hi. Is the lab profile with normal TSH and low free T4 reproducible? The labs should be repeated. If the free T4 was just below the normal range, and on repeating it's in the normal range, then your thyroid function is normal. If free T4 is significantly low and TSH is normal, that suggests pituitary disease affecting the pituitary cells that make TSH. Good luck! ...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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Good evening. I've been suffering from whole body swelling. My TSH is low, and my free T4 is lower on each subsequent test. Is this a thyroid issue?

Good evening. I've been suffering from whole body swelling. My TSH is low, and my free T4 is lower on each subsequent test. Is this a thyroid issue?

NOT REALLY: it sounds more like a PITUITARY condition. The pituitary gland (called the "master gland" is located below the base of the brain and REGULATES thyroid function AND the functions of other glands as well! Hope this helps! Dr Z ...Read more

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Would TSH 5.4 and T4 7.6 be considered mild or severe? What test would my doctor have to do to know what caused my thyroid to be low?

Would TSH 5.4 and T4 7.6 be considered mild or severe? What test would my doctor have to do to know what caused my thyroid to be low?

Mild; repeat test: In most assays, the T4 is normal, and TSH slightly elevated. This could be nothing; sometimes a repeat test will come back normal. The question to ask: is your thyroid gland starting to fail? If so, it is early. Family history? Do you have symptoms? Positive anti-tpo antibodies? If you have symptoms and if there is evidence that your thyroid is failing, you should start on levothyroxine. ...Read more

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Can you still be hypo after having high TSH -6.97 months back and now 5.9- neg antibodies? Thyroid US done which was fine. T4 low normal range.

Can you still be hypo after having high TSH -6.97 months back and now 5.9- neg antibodies? Thyroid US done which was fine. T4 low normal range.

High TSH, low thyro: Your pituitary gland tells you that you are not having enough thyroid by producing more TSH. Thus whenever it is high, it means you need more thyroid. ...Read more

Dr. David Sneid
1,406 doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid ...Read more