9 — Thyroid Peroxidase Level

If you are experiencing symptoms like fatigue, weight changes, or hair loss despite a normal TPO result, your doctor may look for non-autoimmune causes or monitor your levels over time.

The Thyroid Peroxidase antibody test measures the amount of antibodies your immune system produces against an enzyme (TPO) found in the thyroid gland.

Most labs define a normal TPO result as anything between 0 and 34 IU/mL . thyroid peroxidase level 9

An autoimmune cause of hyperthyroidism (overactive thyroid). Next Steps and Considerations

Laboratory "normal ranges" can vary slightly. You should always compare your result against the specific reference range provided on your lab report. If you are experiencing symptoms like fatigue, weight

Doctors usually order this test to help diagnose or rule out autoimmune thyroid conditions:

Are you experiencing any that led to this test, or are you also looking for info on TSH levels ? An autoimmune cause of hyperthyroidism (overactive thyroid)

While a level of 9 is normal, it should be interpreted alongside other thyroid markers: