I'm trying to understand the difference between TSH and TSH ultrasensitive tests. How do they differ, and is one considered better than the other? It's a bit confusing to me.

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Dr Ibrahim Salah

General Practitioner

MBBS
2+ Yrs

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TSH (Thyroid-Stimulating Hormone) and TSH Ultra-Sensitive are both blood tests that measure thyroid function, but the key difference lies in their sensitivity: TSH measures TSH levels above 0.5-1.0 mUL, while TSH Ultra-Sensitive measures levels as low as 0.01-0.05 mUL, making it more sensitive in detecting subtle thyroid function abnormalities, especially in cases of hyperthyroidism or thyroiditis, so the Ultra-Sensitive test is generally considered better for diagnosing and monitoring thyroid conditions.

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Answered 04/07/2025

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