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Unexplained weight gain or loss, fatigue, hair thinning, cold intolerance, palpitations, and menstrual irregularities may prompt thyroid screening. TSH is the usual first-line test.
TSH alone screens most cases. Extended panels add Free T3, Free T4, and thyroid antibodies when hyper/hypothyroidism or autoimmune disease is suspected.
Fasting is generally not required. Some doctors prefer morning samples. If you take thyroid medication, ask your physician about timing relative to the blood draw.
Usually no, unless combined with fasting panels in a health checkup package.
Routine thyroid panels are typically available within 24–48 hours.