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Doctor insights on: What Is The Normal Tsh And T4 Level In A New Born Baby

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What are normal TSH and T4 levels in blood?

What are normal TSH and T4 levels in blood?

See below: Normal ranges vary from lab to lab and you should check the reference range for your lab. General ranges are given below:
tsh: 0.4 - 4.0 miu/l
t4: 4.5 – 12.5 for more info see the site below
http://thyroid. About. Com/cs/newsinfo/l/bltest_values. Htm. ...Read more

Dr. Quang Nguyen
943 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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What is the meaning of high level of anti-TPO antibodies but normal TSH and t4?

What is the meaning of high level of anti-TPO antibodies but normal TSH and t4?

Hashimoto's thyroid: It means you have hashimoto's thyroid disease but your thyroid function is currently normal. This might be because you are taking the correct dose of thyroid hormone replacement or because your thyroid is still able to make normal amount of hormone despite the insults from the antibodies. If this is the case, monitor your thyroid function closely because you will become hypothyroid in the future. ...Read more

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If you have a normal TSH and T4 levels but your T3 (liothyronine) is low do you need to increase levothyroxine?

If you have a normal TSH and T4 levels but your T3 (liothyronine) is low do you need to increase levothyroxine?

Depends: The T3 (liothyronine) may be low before you take your medication and isn't necessarily abnormal. If you still have symptoms and the TSH is not in the low part of the normal range then adding more levothyroxine is probably the right thing to do. Some people do not convert enough of the T4 to T3 (liothyronine) and they need to take some T3 (liothyronine) in addition to T4 or take a natural thyroid med like Armour Thyroid or nature-throid. ...Read more

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What would cause a low T3 (liothyronine) level but normal TSH and T4 levels? Would that be considered hypothyroidism?

What would cause a low T3 (liothyronine) level but normal TSH and T4 levels? Would that be considered hypothyroidism?

No: Low t3 (liothyronine) with nl TSH and T4 is not hypothyroidism. Many things can make t3 (liothyronine) levels decrease such as illness, stress, colds etc. It is nonspecific and could also be lab error so low t3 (liothyronine) in the face of nl TSH and free T4 levels does not mean very much. ...Read more

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What does a normal TSH level with an elevated T4 level mean?

What does a normal TSH level with an elevated T4 level mean?

Nothing: The TSH is more accurate. A free T4 is more accurate than a t4, which can be affected by many factors such as estrogen. Are you on any form of estrogen, bcp's etc? ...Read more

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Tsh levels are these normal? Tsh- 3rd generation- 1.04 miu/l, then another one was 0.63 miu/l. Tsh w/free T4 rfx 1.50 miu/l. Are these normal levels?

Tsh levels are these normal? Tsh- 3rd generation- 1.04 miu/l, then another one was 0.63 miu/l. Tsh w/free T4 rfx 1.50 miu/l. Are these normal levels?

Probably: Most labs include a reference range (or normal range) in their reports. While there can be some variation from one lab to another, almost all labs would consider TSH values between 0.5 to 3.0 to be normal. All three of your levels fall in this range, and so would be considered normal. ...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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My T3 (liothyronine) and T4 levels are normal, TSH is 7.76 inspire of taking thyronorm 50mg everyday, please advise?

My T3 (liothyronine) and T4 levels are normal, TSH is 7.76 inspire of taking thyronorm 50mg everyday, please advise?

Higher dose: Tsh is more sensitive than T3 (liothyronine) or T4 levels for identifying patients whose thyroid levels are abnormal for them. A high TSH means that your pituitary gland is trying to get your thyroid to make more thyroid hormone. Since your thyroid can't (or you wouldn't be on thyroid hormone), you probably need a stronger thyroid tablet. Talk to your doc to make sure you're getting the most from your pills. ...Read more

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What does a normal TSH but low free T4 level mean? Can you have an underactive thyroid with a low T4 alone? Tsh 2.45 T4 7

What does a normal TSH but low free T4 level mean? Can you have an underactive thyroid with a low T4 alone? Tsh 2.45 T4 7

Thyroid function: When TSH is normal and T4 is low this is called subclinical hypothyroidism. It is not treated unless if you have symptoms.
Also if TSH > 10 some would start treatment. Hope that helps answer your question. ...Read more

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Might the cause of severe and chronic constipation be related to something within the htp axis even with normal tsh, t3, (liothyronine) and T4 levels?

Might the cause of severe and chronic constipation be related to something within the htp axis even with normal tsh, t3, (liothyronine) and T4 levels?

"Pop" diagnosis: You're already on prednisone. "hypothalamic-pituitary axis" disorders as a popular notion somewhere at the borderland between alternative-complimentary and mainstream. I trust you drink water ; have already looked at the habit, diet, fitness and medication angles. Porphyria, lead poisoning, iron / calcium supplements, and chagas's are only a few of the causes that may be overlooked in the workup. ...Read more

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I had normal tsh, t3, (liothyronine) t4, but antithyroglobulin antibody level is 263 and thyroid uptake showed homogenous uptake at 56%. What should I do?

I had normal tsh, t3, (liothyronine) t4, but antithyroglobulin antibody level is 263 and thyroid uptake showed homogenous uptake at 56%. What should I do?

Auto immune thyroid: Your thyroid functions are normal presence of thyroglobulin antibodies indicate autoimmune disease though more sensitive test is tpo autoimmune disease makes thyroid inefficient and hence iodine trapppping is increased of these people 30 percent will develop undersctivity. ...Read more

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I have a 3.5cm thyroid nodule with lower neck swelling, but normal TSH, T3, T4 blood levels. What could be causing this?

I have a 3.5cm thyroid nodule with lower neck swelling, but normal TSH, T3, T4 blood levels. What could be causing this?

Goiter or Cancer?: A Thyroud mass can be benign in which case it is called a Goiter. There is about 10% risk that it can be a cancer. You should see your physician for further trests such as an ultrasound and or a Needle biopsy. Blood tests only show if your thyoid functions are normal or not. Since these are normal, you now need to go to the next step of further evaluation to find the cause of your Thyroid nodule. ...Read more

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Graves and RAI 12 years ago. 125mcg synthroid (thyroxine). All levels normal. 6 years ago TSH dropped to 0 and Free T3 & T4 low normal. TSH won't increase?

Graves and RAI 12 years ago. 125mcg synthroid (thyroxine). All levels normal. 6 years ago TSH dropped to 0 and Free T3 & T4 low normal. TSH won't increase?

How do you feel?: This is really the question to be asking. Whoever is managing you may feel a need to lower your dose slightly to see if TSH rises / protect you from osteoporosis later in life / practice defensive medicine, but I'd be most concerned with how you actually feel. If you don't recognize symptoms / signs of hypothyroidism / hyperthyroidism, perhaps doing what's working is best. ...Read more

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Diagnosed Hashimoto's Feb'13, on thyroxine since. Test last week show normal TSH, T3, (liothyronine) T4 levels but 12 nodule goitre found. What could the nodules be?

"pseudo" nodules: The typical ultrasound finding of Hashimoto's is "heterogeneous texture". This appears as a very irregular look. As this progresses, one starts to see areas that are darker or lighter than the rest of the thyroid and can look like nodules. However, many times they are not true nodules, and are referred to as "pseudo" nodules. They are typically under 1 cm in size. Above 1 cm, they may need biopsy ...Read more

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Normal TSH and T4 but high T3 (liothyronine) what does it indicates?

Normal TSH and T4 but high T3 (liothyronine) what does it indicates?

How high?: 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. It would help to know the actual values of your laboratory results and the reference values (normal ranges) for the laboratory that did the tests. ...Read more

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Low T3, (liothyronine) but normal TSH and T4. Really tired, cold etc. Family hx of Hyprothyroidism.

Low T3, (liothyronine) but normal TSH and T4. Really tired, cold etc. Family hx of Hyprothyroidism.

Not hypothyroid: If your TSH and T4 are normal then your are NOT hypothyroid. Low T3 (liothyronine) can be due to non-thyroidal illnesses. This is because most of Thyroxine (T4) is made in the thyroid gland but 80% of circulating T3 (liothyronine) is made in peripheral tissues (liver, muscle etc) from the conversion of T4 to the more biologically active T3 (liothyronine). Thus illnesses affecting these other organs or tissue can cause a low T3 (liothyronine). ...Read more

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What does normal tsh, but high free T4 mean?

What does normal tsh, but high free T4 mean?

Recheck the labs: Normally, if the ft4 is high, either due to hyperthyroidism or taking too much synthroid, (thyroxine) your TSH is low. Mistakes in labs can occur, so first have them rechecked. Rarely, you can have a pituitary tumor that makes TSH and causes hyperthyroidism, giving you both increased TSH and ft4. But this is rare, and more likely there is a simple explanation. ...Read more

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Normal TSH, high free T4 mild elevation, what might be the cause?

Repeat the labs: Hi. In all likelihood, it's a lab error or some trivial explanation. Repeat the labs to see if the lab profile is reproducible. Among the very rare possibilities that it's real would be thyroid hormone resistance, a condition wherein a mutation in a subunit of the thyroid hormone receptor is present (these people are euthyroid), or a pituitary adenoma that makes thyroid hormone (these are hyperthy ...Read more

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Normal tsh. T4 is high. Retake blood test again still high. Retake it again. Now its normal. Why is that?

Normal tsh. T4 is high. Retake blood test again still high. Retake it again. Now its normal. Why is that?

Lab values vary: Lab values can vary (assuming there has been no change in a patient's status nor medications). That is why lab results are "just numbers", and one should see the doctor for an interpretation of the numbers. Sometimes, 3 tests are done to see if 2 of the 3 results will match closely. A doctor may know if certain lab locations or lab companies tend to "run high" or "run low" on their results. ...Read more

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I have hashimotos disease normal TSH and norml t 3 and T4, but high antibodies, do I need medication?

Not yet: You will likely need thyroid pill in the future as the disease progresses but not yet. This condition needs to be followed by your doctor regularly. ...Read more

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Diagnosed with hashimotos but normal tsh t4 doc sAid not yet hypo, but feel every symptom of hypo, is that normal?

YES: I have seen many patients with normal thyroid function, with or w9ithout a diagnosis of Hashimoto's thyroiditis who had CLASSICAL symptoms of an underactive thyroid but (LOW) normal functioned as measured by standard blood tests! ASK YOUR Health Care Provider to MEASURE your serum T-3!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Just a thought!
Dr Z ...Read more

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Hypo symptoms but endo will not treat as Free T4 normal&TSH ranges 2.8 to 4.4. Hashimitos confirmed many time by excess TPO/ab. Could treating help?

Not deficient: Hashimotos can go through three phases, 1. uncommonly it may cause hyperthyroidism in an early phase of the disease, 2. followed by normal thyroid function and the 3. long phase of hypothyroidism. At this time you do not thyroid deficiency and taking thyroid medication is unlikely to be helpful. ...Read more

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What does a low normal TSH (1.4) and high T4 (11.1) mean? T3 (liothyronine) is normal.

Subclinical thyroid: Could represent subclinical hyperthyroid or early thyroid disease or lab error. Should monitor this over a period of months to see if there is any change. ...Read more

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Normal tsh, high T4 and high t3 (liothyronine). What is it?

A high protein: T4 and T3 (liothyronine) are bound to a protein in the blood and when it is high, the T4 and T3 (liothyronine) can be elevated with a normal tsh. Estrogen, birth control and pregnancy are the most common causes of an elevation of this protein. ...Read more

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Normal TSH but low free t4? What's 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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What does a normal tsh, low T4 and low T3 (liothyronine) mean?

Perhaps nothing: Such tests need to be repeated. If the T4 and T3 (liothyronine) were measured as total T4 & T3 (liothyronine) it may mean only that the binding proteins of thyroid hormone are low. Ask your doctor what was done and his/her interpretation. ...Read more

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Help! Is it possible to have normal tsh, t4, and T3 (liothyronine) yet still be hyperthyroid?

Help! Is it possible to have normal tsh, t4, and T3 (liothyronine) yet still be hyperthyroid?

No: If TSH, T4 (measured as free T4), and T3 (liothyronine) (measured as either total T3 (liothyronine) or free T3 (liothyronine)) are all normal, that excludes hyperthyroidism. ...Read more

Dr. Steven Griggs
1 Doctor shared a insight

Neonatal (Definition)

The term neonatal is generally used to describe events that occur with an infant within the first 30 days after birth. Some practitioners are looser with the definition & extend the ...Read more


Dr. David Sneid
1,422 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more