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Thyroid Function Test

Evaluates TSH and thyroid hormones to assess thyroid status.

Turnaround: 6-8 hours Sample: Blood

Test Overview

Thyroid function testing helps evaluate whether the thyroid gland is underactive or overactive. It is commonly used in fatigue workup, endocrine review, fertility assessment, and treatment follow-up.

Parameters Measured

TSH
Primary thyroid regulation marker
Normal Range: 0.4-4.0 mIU/L
Free T4
Circulating thyroxine level
Normal Range: 0.8-1.8 ng/dL
Free T3
Active thyroid hormone fraction
Normal Range: 2.3-4.2 pg/mL

When is this test recommended?

Evaluation of fatigue, weight change, or palpitations
Follow-up for known thyroid disease
Assessment during fertility or pregnancy care
Monitoring response to thyroid medication

Preparation Instructions

  • Preferably collect the sample in the morning.
  • Inform the lab about thyroid medication use.
  • Do not stop prescribed medication unless your doctor instructs you to do so.

Frequently
asked questions

Thyroid Function Test helps the laboratory and treating physician review the relevant markers for this test in a clinically structured way.

This test is usually performed on Blood, and results are typically available within 6-8 hours.

Morning sampling is preferred for consistency.

Direction → Directions

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Benghazi Main Branch

Contact Us

Request a demo walkthrough, ask about test categories, or simulate a patient inquiry with this seeded contact section.

Address

Jamal Abdel Nasser Street, near Al Hawari district, Benghazi

Give us a call

+218 91 000 1122

Send us an email

benghazi@alsaleemlabs.demo