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Doctor insights on: How Long To Fast Before Thyroid Blood Test

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Can hyper thyroidism or thyroid meds cause a high bac reading in a blood test?

Can hyper thyroidism or thyroid meds cause a high bac reading in a blood test?

Unclear question: What is a "bac reading"? It may help if you spell out your concern. ...Read more

Dr. Amrita Dosanjh
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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My thyroid blood test is 16 what does this mean?

My thyroid blood test is 16 what does this mean?

Please Clarify: There are several different thyroid blood tests with different result parameters. You must be specific with the test you are asking about. ...Read more

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What are thyroid results from my blood test normal?

What are thyroid results from my blood test normal?

Normal thyroid : Hi. If your blood tests for thyroid function (TSH & free T4) are normal, it means your thyroid is not over-producing or under-producing thyroid hormone, and that thyroid hormone is being made normally. ...Read more

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Nwhat is the abreviation for thyroid in a blood test?

Nwhat is the abreviation for thyroid in a blood test?

TSH: When a doctor orders a blood test to look at the thyroid and its function, they might order a tsh, which stands for thyroid stimulating hormone. You can also look at T3 (liothyronine) and T4 levels, which represent the serum amounts of the products produced by the thyroid and its general activity. ...Read more

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Can you do special blood test just for a the thyroid?

Yes: A single test can be done on a blood sample to start the investigation. Pcp can do it. ...Read more

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How can my thyroid levels appear low on a blood test?

How can my thyroid levels appear low on a blood test?

See below: T4 and T3 (liothyronine) are two major thyroid hormones and can be measured accurately in blood. The levels will be low if you thyroid is functioning less than normal. See this site for more info. http://www.thyroid.org/wp-content/uploads/patients/brochures/FunctionTests_brochure.pdf ...Read more

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My thyroid blood test came out low what does that mean?

My thyroid blood test came out low what does that mean?

Hypothyroid: My impression u are referring to measuring thyroxine levels called t4has a range which is wide so unless accompanied by high TSH not much significance unless suspecting what is secondary hypothyroid uncommon. ...Read more

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Help, how much blood is taken for a thyroid blood test?

Help, how much blood is taken for a thyroid blood test?

Depends on type of: Tests. Usual thyroid function tests can be done on about 5 ml of blood. ...Read more