Does a thyroid function test require fasting for accurate results?

No, fasting is not required for accurate results in a thyroid function test (TFT). Since the test measures hormone levels like TSH, T3, and T4, food does not affect the outcome. However, taking thyroid medication or other drugs may influence your test results, so it’s important to follow your doctor’s advice on medication timing before the test. Always consult your healthcare provider for specific instructions to ensure accurate thyroid function readings.