Tips and Tricks

What is the most accurate test for hypothyroidism?

What is the most accurate test for hypothyroidism?

Because the TSH test is the best screening test, your doctor will likely check TSH first and follow with a thyroid hormone test if needed. TSH tests also play an important role in managing hypothyroidism.

What tests are used to diagnose hypothyroidism?

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.

Can you test for hypothyroidism at-home?

According to Steven D. Shapiro MD, at-home thyroid tests are very easy to use. “They are sent directly to your house, require an easy finger prick, and are sent back in the mail. Most kit providers can turn results around within just a few days, similar to the wait-time for in-person lab results.”

Does T3 T4 TSH test need fasting?

Generally, you don’t need to fast before doing a thyroid function test. However, not fasting is sometimes linked to a lower TSH level. This means your results might not pick up on mild (subclinical) hypothyroidism — where your TSH levels are only mildly elevated.

What is the best initial test for hypothyroidism?

The best initial test for hypothyroidism is the thyroid stimulating hormone (TSH) test, which is a blood test used to assess the level of thyroid stimulating hormone your body is releasing.

When should Thyroid ultrasonography not be performed in patients with hypothyroidism?

Do not routinely order thyroid ultrasonography in patients with abnormal thyroid function tests if there is no palpable abnormality of the thyroid gland. Do not obtain a total or free triiodothyronine level when assessing levothyroxine dose in patients with hypothyroidism.

Where can I find patient information for patients with hypothyroidism?

Am Fam Physician. 2021 May 15;103 (10):605-613. Patient information: A handout on this topic is available at This clinical content conforms to AAFP criteria for CME.

Is population screening beneficial to patients with hypothyroidism?

There is no evidence that population screening is beneficial. Symptom relief and normalized thyroid-stimulating hormone levels are achieved with levothyroxine replacement therapy, started at 1.5 to 1.8 mcg per kg per day.