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Doctor insights on: Low T4 Thyroid Hormone What Does This Mean

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How/Does Thyroid hormone production normally fluctuate along with female hormone cycle? Are you more likely to have hi/lower t4/t3 at certain times?

How/Does Thyroid hormone production normally fluctuate along with female hormone cycle? Are you more likely to have hi/lower t4/t3 at certain times?

There is: No "DIRECT" connection between thyroid gland output and t-4/t3 ratios and "female hormones" except that the BINDING of the hormone itself is altered by female hormone levels...This does not generally effect the end point of Thyroid Hormone effects (on growth, muscles and other tissues)
Hope this helps!
Perhaps a more specific question can generate a better answer!
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Dr. Erik Borncamp
1 Doctor shared a insight

Hormone (Definition)

A hormone (from greek ὁρμή, "impetus") is a chemical released by a cell or a gland in one part of the body that sends out messages that affect cells in other parts of the organism. Only a little amount of hormone is required to alter cell metabolism. In essence, it is a chemical messenger that transports a signal from ...Read more


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My T3 (liothyronine) is 101.80 ng/dl, T4 is 6.60 ug/dl, TSH is 1.460 uiu/ml. Is hypothyroidism still possible with normal thyroid hormone test results?

My T3 (liothyronine) is 101.80 ng/dl, T4 is 6.60 ug/dl, TSH is 1.460 uiu/ml. Is hypothyroidism still possible with normal thyroid hormone test results?

Normal: Your thyroid levels are normal. Despite what you may read on the internet or hear from "alternative" doctors, if your thyroid levels are normal, you do not have hypothyroidism. Don't let anybody tell you that normal is not normal. ...Read more

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Is thyroid hormone the same as thyroxine?

Is thyroid hormone the same as thyroxine?

Thyroxine is a type: The thyroid gland secretes two types of hormones: thyroxine (t4) and triiodothyronine (t3), but it produces T4 at much higher levels than t3. When treating thyroid hormone deficiency, your physician may prescribe levothyroxine (which is oral tablet of t4), liothyronine (oral formulation of t3), or combinations of such, or even dessicated (dried) pig thyroid as replacement therapy. ...Read more

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So the internist said it wasn't necessary for my mom to increase her synthroid (thyroxine) dosage of 25 mcg because she has active thyroid hormone (T3) of 2.9. Do you agree?

So the internist said it wasn't necessary for my mom to increase her synthroid (thyroxine) dosage of 25 mcg because she has active thyroid hormone (T3) of 2.9. Do you agree?

???: Usually we use TSH to titrate the synthroid (thyroxine) dose. There may be some confusion. Better double check with her internist.

Good luck, your mother will be proud of you. ...Read more

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I would like to know would the thyroid hormone levels be high or low after delivery in a woman?

I would like to know would the thyroid hormone levels be high or low after delivery in a woman?

Either way: There is a very common condition called "post partum thyroiditis". It can cause fluctuations in your thyroid function leading to both high and low hormone levels. Sometimes it requires medication, but sometimes it levels out on its own. You may need to consult with an endocrinologist. ...Read more

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Can low thyroid hormone levels cause menopause?

Can low thyroid hormone levels cause menopause?

Not really: But hormones all do an intricate dance with each other and so thyroid dysfunction can definitely alter female hormone function and cause many symptoms which mimic menopause. Get your levels checked! ...Read more

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Can low thyroid hormone symptoms like hair-loss be reversed?

Can low thyroid hormone symptoms like hair-loss be reversed?

Allopecia: If scalp hair loss called allopecia is due to hypothyroidism one can reverse it by normalizing thyroid function. Most of the time hypothyroidism is due to an autoimmune disorder called hashimotos disease. Allopcia is an accompanying autoimmune disorder and may not be due to low thyroid hormones. It's an association -- not causation. ...Read more

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Can low thyroid hormone symptoms such as hair loss be reversed?

Can low thyroid hormone symptoms such as hair loss be reversed?

Possibly/depends,,,,: This may be reversed depending on how severe and long-standing the thyroid issue is and how good a person's circulation is. Strict adherence to therapy would also help. ...Read more

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Are thyroid nodules always thyroid cancer? I have a thyroid nodule and my levels of some thyroid hormone are low. My doctor wants to do more tests, but I don’t really understand what he said. Do I have cancer, or could it be something else?

Are thyroid nodules always thyroid cancer? I have a thyroid nodule and my levels of some thyroid hormone are low. My doctor wants to do more tests, but I don’t really understand what he said. Do I have cancer, or could it be something else?

Over: Over 95% of thyroid nodules are benign. Therefore the risk of cancer is low, but can be increased in younger or older people, people with a family history of thyroid cancer, or people who have been exposed to radiation (x-rays do not count). Sometimes benign thyroid nodules can secrete extra thyroid hormone, more than your body needs. If your doctor is suspicious of this, they will order a nuclear study called a thyroid uptake and scan. If a nodule is over a centimeter, that is when we usually will perform a fine needle aspiration to get a sample of cells in the nodule. If nodules are under a centimeter and there is no evidence of over activity, we can simply monitor with serial ultrasounds. ...Read more

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Do I need thyroid hormone if I have low free t3, (liothyronine) normal TSH and high tpo antibodies?

Do I need thyroid hormone if I have low free t3, (liothyronine) normal TSH and high tpo antibodies?

Possibly.: The TSH is normal so it might be a variation of normal or euthyroid. It also might be a developing thyroid condition, but there would be symptoms, like fatigue. The tpo antibodies might mean hashimoto's thyroiditis. This is usually associated with hypothyroidism. It would be wise to see your doctor to follow up. ...Read more

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What usually happens if someone takes too much thyroid hormone every day?

Many things: Short term you can get palpitations, muscle shaking, more bowel movements, can't sleep, sweating more, weight loss, irritability, feeling hot, headache...Long term you can get osteoporosis (weakened bone), heart rhythm abnormalities, enlarged heart... ...Read more

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Why does thyroid hormone cause exophthalmos?

Why does thyroid hormone cause exophthalmos?

Exophthalmos: It does not. Graves disease which is associated with prominent eyes causes antibodies to inflame the surrounding tissues around the eyes. Graves also causes antibodies to stimulate the thyroid causing hyperthyroidism. It is not the high thyroid hormone levels that cause eye prominence. ...Read more

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What is essential for normal synthesis of thyroid hormone?

Thyroid: I would start your search by going online to Yahoo Images and type in Thyroid Hormone. You will find a number of illustrations that should help you.

You can also get more details by simply putting in thyroid hormone at the top - mot imaging - and you will find some interesting reading matter. ...Read more

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Doesn't a thyroidectomy reduce thyroid hormone in the body?

Yes: Depending on how much thyroid tissue is removed, patients may need thyroid hormone replacement after surgery. Sometimes only half of the gland is removed, for example if there is concern a nodule is a cancer. These patients may not need thyroid hormone replacement. Also with goiter sometimes some of thyroid gland is left behind on purpose. More recently the entire gland is frequently removed. ...Read more

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What is thyroid hormone replacement?

What is thyroid hormone replacement?

Simple treatment: Years ago we found that once daily thyroid hormone supplements could help those with a low functioning or nonfunctioning thyroid gland. The expected dose for age/size is prescribed and the effect is monitored by simple blood tests. Occasional increases or decreases in the daily dose is made if blood tests show the need. ...Read more

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Can macrobiotics replace or wean me from thyroid hormone pills?

No: Macrobiotics do not replace thyroid replacement. Talk to your doctor. ...Read more

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What are the therapeutic effects of thyroid hormone replacement?

What are the therapeutic effects of thyroid hormone replacement?

Many: Thyroid hormone replacement is needed to treat hypothyroidism. Patient with hypothyroidism can have fatigue, dry skin/nails, constipation, lack of focus, weight gain...Appropriate replacement of thyroid hormone will raise your level back to a normal level and can alleviate some of the above symptoms. ...Read more

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Can a high thyroid hormone levels be a cause of dizziness like vertigo??

Yes: Get it under control, high thyroid causes heart to race, sweats, weight loss, high bp, bone loss and more. Low thyroid causes weight gain, fatigue, hair loss, high cholest. And more, see an endocrinologist if your dr. Doesn't get the tsh under control it takes 6 weeks to adjust the medicine, levothyroxine. ...Read more

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Is tyrosine included in thyroid hormone replacement?

Is tyrosine included in thyroid hormone replacement?

Almost never.: I do not dso this and I have never seen it done, although some "shaman" may do this! Not necessary, really. ...Read more

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Did a thyroid hormone test. My third generation TSH was 6.71. Is this high?

Yes: Your TSH level is higher than normal and suggests thyroid deficiency. Please consult with your doctor to see if thyroid supplementation is warranted. ...Read more

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I had a thyroid hormone test. My third generation TSH was 6.71. is this high?

I had a thyroid hormone test. My third generation TSH was 6.71. is this high?

Yes: Complete the test with free hormone measurements and thyroid antibodies. Once you know the full picture, then you can treat. ...Read more

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Is a mild elevation of thyroid hormone harmful?

It Could Be: One thyroid hormone lab result is a proverbial window in time. No way to know without following up on that test. It could be normal, the same, lower, or higher when checked again in the context of other thyroid tests, including thyroid antibodies. ...Read more

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What doesparathyroid have to do with thyroid hormone?

Not much: Aside from their close location, really not much else in common. They do different functions. ...Read more

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What symptoms will happen if u have too much thyroid hormone?

What symptoms will happen if u have too much thyroid hormone?

Hyperthyroidism: Symptoms include heart racing, skipped beats, weight loss, anxiety, heat-intolerance, sweatiness and insomnia. ...Read more

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How is tyrosine related to thyroid hormone?

How is tyrosine related to thyroid hormone?

Thyroid synthesis: Thyroglobulin is a protein in the thyroid. It contains many copies of the amino acid tyrosine. Iodine gets added to the tyrosine, and then this tyrosine gets liberated from the thyroglobulin, released into blood, and this iodinated tyrosine is thyroid hormone. But don't think you can cure hypothyroid by eating tyrosine because the body synthesizes tyrosine quite well. ...Read more

Dr. Sandra Lora Cremers
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
1,422 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more