What is TSH and why is it important?

TSH (thyroid-stimulating hormone) is produced by the pituitary gland and regulates the thyroid. It is the most sensitive marker for detecting thyroid problems.

What are the symptoms of a thyroid problem?

Hypothyroidism causes fatigue, weight gain, constipation, and cold sensitivity. Hyperthyroidism causes weight loss, anxiety, palpitations, and heat sensitivity.

How often should I have my thyroid checked?

If you have a diagnosed thyroid disorder, every 6 to 12 months. For general screening, it is recommended starting at age 35 and then every 5 years.

Thyroid

Thyroid Panel

The thyroid panel measures thyroid hormones TSH, T3, and T4 to evaluate thyroid gland function. It helps diagnose hypothyroidism, hyperthyroidism, and other thyroid dysfunctions. It is essential for patients with symptoms such as unexplained fatigue, weight changes, or intolerance to cold or heat.

Preparation

Fasting is generally not required. It is recommended to have the blood draw in the morning and consult your doctor about whether to pause thyroid medication before the test.

Included Tests

LOINC	Test	Unit	Range
3016-3	Thyroid Stimulating Hormone (TSH)	mIU/L	0.4 – 4
3024-7	Free T4	ng/dL	0.8 – 1.8
3051-0	Free T3	pg/mL	2.3 – 4.2

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Frequently Asked Questions

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