Q: What are the normal Anti-TPO Antibodies levels?

Adults: < 34 IU/mL (lab-specific). (IU/mL)

Q: What causes low Anti-TPO Antibodies?

Negative result is the norm — no autoimmune activity detected.

Q: What causes high Anti-TPO Antibodies?

Hashimoto's thyroiditis, Graves' disease, postpartum thyroiditis.

Q: When should I see a doctor about Anti-TPO Antibodies?

If elevated — check TSH and thyroid ultrasound with an endocrinologist.

Question 1

What is Anti-TPO Antibodies?

Accepted Answer

Anti-TPO antibodies are immune markers against thyroid peroxidase, an enzyme of the thyroid gland. Elevated levels indicate autoimmune thyroid disease (Hashimoto's).

Question 2

What are the normal Anti-TPO Antibodies levels?

Accepted Answer

Adults: < 34 IU/mL (lab-specific). (IU/mL)

Question 3

What causes low Anti-TPO Antibodies?

Accepted Answer

Negative result is the norm — no autoimmune activity detected.

Question 4

What causes high Anti-TPO Antibodies?

Accepted Answer

Hashimoto's thyroiditis, Graves' disease, postpartum thyroiditis.

Question 5

When should I see a doctor about Anti-TPO Antibodies?

Accepted Answer

If elevated — check TSH and thyroid ultrasound with an endocrinologist.

Anti-TPO Antibodies

Check your result

Normal ranges

Causes of deviations

Low levels:

High levels:

When to see a doctor

Related biomarkers

Panels

Conditions

Get your full lab report explained