What blood test shows thyroid problems?

What blood test shows thyroid problems?

Thyroid function test A blood test measuring your hormone levels is the only accurate way to find out whether there’s a problem. The test, called a thyroid function test, looks at levels of thyroid-stimulating hormone (TSH) and thyroxine (T4) in the blood. Doctors may refer to this as “free” T4 (FT4).

How do I read my thyroid report?

A normal range for TSH in most laboratories is 0.4 milliunits per liter (mU/L) to 4.0 mU/L. If your TSH is higher than 4.0 mU/L on repeat tests, you probably have hypothyroidism. Your doctor may also order a T4 test. Most of the T4 in your blood attaches to a protein, and when it does, it can’t get into your cells.

Does hypothyroidism show up in routine blood work?

A blood test for levels of TSH is the most sensitive test for determining whether you have hypothyroidism. Most laboratories use 0.45 – 5.00 mIU/L as a normal reference range for TSH. People with TSH between 5.00 and 9.99 mIU/L often have no symptoms (known as subclinical hypothyroidism), but some do.

What is normal thyroid level for a woman?

The normal range of TSH levels in non-pregnant adult women is 0.5 to 5.0 mIU/L. In women, during the menstruation cycle, pregnancy, or after menopause, TSH levels may fall slightly outside the normal range, because of fluctuating levels of estrogen.

What lab work is done for thyroid?

The T4 test and the TSH test are the two most common thyroid function tests. They’re usually ordered together. The T4 test is known as the thyroxine test. A high level of T4 indicates an overactive thyroid (hyperthyroidism).

What is the most accurate test for thyroid levels?

Most doctors consider the sensitive thyroid-stimulating hormone (TSH) test to be the most accurate measure of thyroid activity. By measuring the level of TSH , doctors can determine even small problems in thyroid activity.

What is a normal thyroid reading, from a blood test?

TSH Reading. A TSH test measures the amount of TSH produced by the pituitary gland. This is also a blood test. The normal range for TSH is between 0.5 and 5.0.

What causes high thyroid results?

Graves disease is the most common cause of hyperthyroidism. It is a chronic autoimmune disorder in which the affected person’s immune system produces autoantibodies that act like TSH, bind and activate the TSH receptor, leading to the production of excessive amounts of thyroid hormone.

Is there a “best” thyroid test?

Best for follow-up on results: LetsGetChecked

  • Best lab-based testing: HealthLabs
  • Best membership: Everlywell
  • Best for specialized care: Paloma Health
  • Best for women: imaware