Anti-Thyroid Peroxidase (A-TPO) antibodies are proteins produced by the immune system. They mistakenly target thyroid peroxidase, an enzyme crucial for thyroid hormone production. High levels of A-TPO antibodies can indicate autoimmune thyroid disorders, such as Hashimoto's thyroiditis or Graves' disease. These conditions lead to either underactive or overactive thyroid function, impacting overall health....


Who should get tested for A-TPO antibodies?

Individuals with symptoms of thyroid dysfunction, a family history of thyroid disease, or other autoimmune conditions should consider A-TPO testing.

What does a high A-TPO level indicate?

High A-TPO levels often indicate an autoimmune thyroid disorder, such as Hashimoto’s thyroiditis or Graves’ disease, where the immune system attacks the thyroid.

Is it possible to have high A-TPO levels without having a thyroid disorder?

Rarely, individuals may have elevated A-TPO levels without clear signs of thyroid disease, but it usually warrants further monitoring and evaluation.

Can A-TPO levels change over time?

Yes, A-TPO levels can fluctuate, especially in response to thyroid disease progression or treatment.

Test(s) that measure/test for A-TPO

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