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TSH Levels: Reading an Overactive or Underactive Thyroid

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What is it?

Thyroid stimulating hormone (TSH) regulates thyroid function. Abnormal levels can suggest a thyroid that is overactive or underactive. TSH levels are influenced by the pituitary gland response to thyroid hormone levels.

Why it matters

Reference ranges

This information is educational and does not replace medical advice, diagnosis, or treatment. Your results should be interpreted with a qualified healthcare professional in the context of your health history.