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Doctor insights on: Half Life Of T3 Thyroid

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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

Dr. Julie Abbott
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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TSH=0.4 uiu/ml,T3=1.2,T4=7.2,how is my thyroid ?

TSH=0.4 uiu/ml,T3=1.2,T4=7.2,how is my thyroid ?

Abnormal : Not knowing what the normal value for TSH is for the lab where your blood was done , it is hard to say . However most labs the normal for TSH is 1-5 . Your is below one . I suggest you get a Thyroid evaluation , which may include a Repeat thyroid function tests snd TSH and an Ultra sound of the Thyroid snd proceed from there . ...Read more

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Which is better for under active thyroid. Syntheroid or t3 (liothyronine)?

Which is better for under active thyroid. Syntheroid or t3 (liothyronine)?

Synthroid (thyroxine): Synthroid or some form of levothyroxine is most commonly used. If you are taking it and are concerned that it is not working properly after several months you can ask your doctor to check T3 (liothyronine), (liothyronine) but usually with an adequate dose of T4 the body synthesizes plenty of T3 (liothyronine). ...Read more

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What does it mean if most of my thyroid levels are in the low normal range and my T3 (liothyronine) is low?

What does it mean if most of my thyroid levels are in the low normal range and my T3 (liothyronine) is low?

Nothing: T3 (liothyronine) is important inside the cell, in the blood, the measurement is usually meaningless. If the other thyroid tests (free T4 and tsh) are normal, ignore the t3, (liothyronine) as it's a waste of your blood and money. ...Read more

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What causes an elevated reverse T3 (liothyronine) level but the other thyroid levels are normal thyroid??? My reverse t3 (liothyronine) was 35

What causes an elevated reverse T3 (liothyronine) level but the other thyroid levels are normal thyroid??? My reverse t3 (liothyronine) was 35

Many causes: First, I am impressed your doctor tested reverse T3 as few doctors ever check it. There are many possible causes of increased reverse T3 including high cortisol (from chronic stress, emotional or physical), inflammatory conditions, injuries and infections like Lyme disease (which is surprisingly common and often undiagnosed). See http://www.stopthethyroidmadness.com/reverse-t3/ for more info. ...Read more

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What does it mean to have a total T3 (liothyronine) and reverse T3 (liothyronine) in thyroid diagnosis?

What does it mean to have a total T3 (liothyronine) and reverse T3 (liothyronine) in thyroid diagnosis?

Opposites: T3 (liothyronine) is the more active thyroid hormone. Reverse T3 (liothyronine) is not really functional. When someone is very sick or loses too much weight, the body will sometimes divert thyroid hormone production into an inactive state in an effort to turn metabolism down to conserve energy. That would be the reverse t3 (liothyronine). ...Read more

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Came off wrong T3 (liothyronine) meds and did thyroid tests weeks later - everything normal. Have no appetite except for jello and yoghurt now - help?

Came off wrong T3 (liothyronine) meds and did thyroid tests weeks later - everything normal. Have no appetite except for jello and yoghurt now - help?

Unclear question: Hi. T4 is the normal thyroid med (aka levothyroxine, l-thyroxine, Synthroid, etc). T3 (liothyronine) is a different thyroid med sometimes used with T4. There is desiccated porcine thyroid extract from pig thyroids. There aren't different T3 (liothyronine) meds. If you came off T3 (liothyronine) and were still on T4 with normal labs, that's expected. Using T3 (liothyronine) is not necessary; the body makes it's own T3 (liothyronine) from the T4 you take. ...Read more

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I don't understand why I need less levothyroxine after removal of my ENTIRE thyroid. My dr lowered my dosage. Does the body make more T3/4 elsewhere?

I don't understand why I need less levothyroxine  after removal of my ENTIRE thyroid. My dr lowered my dosage.  Does the body make more T3/4 elsewhere?

Adjust the dose: You do need levothyroxine after removal of thyroid gland. Usually if the lab test shows very low TSH then we do need to decrease the dose so that TSH comes up to acceptable level. Sometimes patients need less dose with advancing age or after losing weight. T4 is solely a product of the thyroid gland, whereas T3 is a product of the thyroid and other tissues where it is formed by deiodination of T4 ...Read more

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Thyroid function in "normal" range. Took 2.5mcg T3 (liothyronine) for 2 months, then stopped. What potential harm did I do? What should I do now, afterward?

Thyroid function in "normal" range.  Took 2.5mcg T3 (liothyronine) for 2 months, then stopped. What potential harm did I do?  What should I do now, afterward?

T3 (liothyronine) use for two month: The question I have to ask you why were you prescribed T3 (liothyronine) and why did you take for two months with normal thyroid profile.Having said that you did not cause and short or long term problem and once you stopped it, it is out of your system for good.So with normal thyroid function which incldes t3, (liothyronine) t4, and tsh.If all are normal there is no indication for any hormone therapy. ...Read more

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My thyroid test results are low t3, (liothyronine) freet3 is barely within range low end. How can I get my dr. To try thyroid medication to see if it would help?

My thyroid test results are low t3, (liothyronine) freet3 is barely within range low end. How can I get my dr. To try thyroid medication to see if it would help?

Need more info: What are your symptoms? Symptoms of under active thyroid? What are your other levels? Free t4, tsh, thyroid antibodies test? If feel not getting anywhere you can try and see a specialist in thyroid called an endocrinologist who may be able to help you and explain your labs and treatment options if any available to you. ...Read more

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Is there an alternative to amour thyroid that replaces both T3 (liothyronine) and T4?

Don't need to takeT3: Nearly all endocrinologist agree that you should be taking just levothyroxine (T4) and not either Armour thyroid or both T4 and T3 (liothyronine). Your body is very good at converting some of the T4 you take into T3 (liothyronine). ...Read more

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My dear friend needs answers that her doctor doesn't have. She has high T3 but doesn't have a thyroid. Anything else in the body that makes T3?

My dear friend needs answers that her doctor doesn't have. She has high T3 but doesn't have a thyroid. Anything else in the body that makes T3?

Only thyroid tissue: There are no other organs in the human body that produce thyroxine, so unless your friend is taking a thyroxine containing supplement or prescription thyroid medication, she should not have high T3. It is possible that she was told she doesn't have a thyroid gland on ultrasound or after surgery, but some thyroid tissue remains. Your friend should consult an endocrinologist to clarify things. ...Read more

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Doctor im thyroid problem.my t3 (liothyronine) in thyroid fx is high.so cn i tk flaxseed?

YouCanButNeedThyroid: You can take Flax Seed but that will not help your Thyroid Problem.T3 (liothyronine) problem has to be treated differently Consult your Doctor or an Endocrinologist for treatment of your Thyroid T3 (liothyronine) problem if it is not already being treated ...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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Thyroid (increased T3 (liothyronine) and t4). What does this mean? Should I be concerned?

Thyroid (increased T3 (liothyronine) and t4). What does this mean? Should I be concerned?

Tell us TSH: Hi. Not enough information. Is TSH below normal? That's VERY important to know. T4 and T3 (liothyronine) can be elevated due to elevated thyroxine binding globulin (TBG) with completely normal thyroid function. It's better to measure free T4 and free T3 (liothyronine) than T4 and T3 (liothyronine) per se. So I can't tell you if anything is even abnormal without more information. ...Read more

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High thyroglobulin & T3 (liothyronine) Free levels post thyroid lobectomy indicates what?

Thyroid: Something does not add up. Thyroglobulin may be high for a number of reasons and can be controlled if needed. I don't understand why free T3 (liothyronine) is high post thyroid lobectomy. Please pursue this with your doctor and the the thyroid surgeon. If their answers make sense could you please let me know. ...Read more

Dr. Jesse Krakauer
455 doctors shared insights

Liothyronine (Definition)

Liothyronine is a thyroid ...Read more


Dr. David Geffner
454 doctors shared insights

T3 (Definition)

T3 is a thyroid ...Read more