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Doctor insights on: Do I Need To Fast Before A 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. Debra Rosenblatt
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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Do I have to fast for thyroid blood test? It read that I don't have to. The never told me that I had to either.

Do I have to fast for thyroid blood test? It read that I don't have to. The never told me that I had to either.

No: You do not need to fast for thyroid function tests. However, if your doctor ordered other tests, e.g. blood lipids, or blood glucose, fasting is required.
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.
Get HPV vaccine. ...Read more

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Is it possible for me to drink coffee before a thyroid blood test?

You may: If thyroid blood test is the only test you are having, coffee is not likely to materially affect the results. Generally it is better to be fasting for lab tests. ...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 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 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

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Can a person have a thyroid problem and not show on a blood test?

Can a person have a thyroid problem and not show on a blood test?

Yes: Patients can have normal function of the thyroid which is measured by blood test but have an enlarged thyroid or thyroid nodules which are seen with imaging on ultrasound. ...Read more

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What does it mean when the nurse says that your thyroid blood test is high?

What does it mean when the nurse says that your thyroid blood test is high?

Depends: It depends on what the nurse is referring to. She may be referring to a TSH level being high, in which case your thyroid level may be low (hypothyroid). She may be referring to a T4 or free T4 level being high, in which case your thyroid level is high (hyperthyroidism). ...Read more

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Can you tell me all about what is checked when they do a thyroid blood test?

Many possibilities: There are many possible thyroid blood tests, depending upon which particular disorder someone is looking for. The most common is a tsh, which is a pituitary hormone that is very sensitive but not very specific for telling you what kind of thyroid problem you have. Check w/your doctor. ...Read more

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Is a thyroid blood test of 0.87 normal? Is a thyroid blood test of 0.87 normal?

Is a thyroid blood test of 0.87 normal? Is a thyroid blood test of 0.87 normal?

Is this TSH level?: There are several types of thyroid tests like TSH level or T4 level. So you need to indicate the exact name of the test done. If it is tsh... This is normal. ...Read more

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What does it mean when your results from a blood test show thyroid level a little low?

Need more info: Results of lab tests need to be interpreted in the context of whole health status. What test did you have and what was the actual result? It would be prudent to discuss the results with the doctor who ordered the tests. ...Read more