Anti-Thyroid Peroxidase (A-TPO) antibodies are immune proteins that mistakenly attack thyroid peroxidase, an enzyme vital for producing thyroid hormones. High levels of A-TPO antibodies are commonly linked to autoimmune thyroid conditions such as Hashimoto’s thyroiditis and Graves’ disease, which can result in either an underactive or overactive thyroid and impact overall health.
Individuals with symptoms of thyroid dysfunction, a family history of thyroid disease, or other autoimmune conditions should consider A-TPO testing.
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.
Rarely, individuals may have elevated A-TPO levels without clear signs of thyroid disease, but it usually warrants further monitoring and evaluation.
Yes, A-TPO levels can fluctuate, especially in response to thyroid disease progression or treatment.