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Thyroid stimulating hormone (TSH) is produced and secreted by the pituitary gland and stimulates the thyroid to make T3 and T4. When TSH is elevated, low thyroid function may be indicated. When TSH is low, it is indicative of high thyroid function.
TSH is used as a first line screening tool to assess thyroid disease; however, is best utilized when evaluated in conjuction with other thyroid markers such as T3, T4, thyroid antibodies, etc.
Additionally, health care providers check TSH to monitor disease progression and treatment.
Fasting is not required for this test. Take all medications as prescribed.
The laboratory services are for informational purposes only. It is not the intention of National Diagnostics, Inc and Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.
Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither National Diagnostics, Inc or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.