Pathology
Thyroid-Stimulating Hormone (TSH)
Measures TSH levels to evaluate thyroid gland function and diagnose
About This Test
Measures TSH levels to evaluate thyroid gland function and diagnose conditions like hypothyroidism or hyperthyroidism.
Test Preparation / Instructions
Test Instructions:
Fasting: Typically no fasting is required, though some labs prefer a morning blood draw since TSH levels can fluctuate slightly throughout the day.
Medication: If you are already taking thyroid hormone replacement medication, your doctor will usually advise whether you should take your dose before or after the blood draw.
