Thyroid Peroxidase Level — 9

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

Are you experiencing any that led to this test, or are you also looking for info on TSH levels ?

Doctors usually order this test to help diagnose or rule out autoimmune thyroid conditions: thyroid peroxidase level 9

These are the primary markers for thyroid function. If these are normal, a normal TPO level generally confirms healthy thyroid health.

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. Most labs define a normal TPO result as

Laboratory "normal ranges" can vary slightly. You should always compare your result against the specific reference range provided on your lab report.

An autoimmune cause of hyperthyroidism (overactive thyroid). Next Steps and Considerations If these are normal, a normal TPO level

The most common cause of hypothyroidism (underactive thyroid).