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Thyroid Peroxidase Antibodies (Anti-TPO) details

What Thyroid Peroxidase Antibodies (Anti-TPO) shows

Thyroid peroxidase antibodies (anti-TPO) are autoantibodies that target an enzyme essential for thyroid hormone production, and their presence is the most common laboratory marker of autoimmune thyroid disease, found in the large majority of people with Hashimoto's thyroiditis (the leading cause of hypothyroidism) and also frequently in Graves' disease (a leading cause of hyperthyroidism). A positive result supports an autoimmune cause behind an abnormal TSH or thyroid hormone result, and can sometimes be elevated even before thyroid hormone levels themselves become abnormal, which can be relevant for monitoring thyroid risk over time.

Normal ranges

Typical adult range

0โ€“9 IU/mL

Most labs report a range close to this

Hormunity optimal range

0โ€“6.8 IU/mL

A narrower functional target

Each lab sets its own reference range. Always compare your result with the range printed on your report, and review it with a healthcare provider.

Tests that include Thyroid Peroxidase Antibodies (Anti-TPO)

Quest Not offered
Quest Not offered
Quest Not offered
Quest Not offered
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