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Also reported in: IU/L
Your TPO antibody level is below the threshold that indicates autoimmune thyroid disease. Your immune system is not mistakenly targeting your thyroid at a clinically significant level.
Undetectable TPO antibodies (immune proteins that target your thyroid) means your immune system is not attacking your thyroid. This is the ideal finding and indicates no autoimmune thyroid disease activity.
Excellent finding. No action needed.
TPO Antibodies: {{value}} {{unit}} — essentially absentVery low TPO antibodies (immune proteins that target your thyroid) indicate minimal to no autoimmune activity targeting the thyroid. This is a healthy finding.
No action needed.
TPO Antibodies: {{value}} {{unit}} — very lowVery low TPO antibody levels are essentially normal — your immune system is not attacking your thyroid to any significant degree.
No action needed.
TPO Antibodies: {{value}} {{unit}} — lowYour TPO antibody level is below the threshold that indicates autoimmune thyroid disease. Your immune system is not mistakenly targeting your thyroid at a clinically significant level.
No action needed. If you have thyroid symptoms despite normal antibodies, other may contribute to should be investigated.
TPO Antibodies: {{value}} {{unit}} — within reference range (<35 IU/mL)Optimal TPO antibody levels (very low) indicate a very low likelihood of autoimmune thyroid disease.
Excellent result. No action needed.
TPO Antibodies: {{value}} {{unit}} — optimalBorderline elevated TPO antibodies (immune proteins that target your thyroid) suggest the immune system is beginning to target thyroid tissue, though not yet at a level causing significant thyroid damage. This is called 'euthyroid autoimmune thyroiditis' — the thyroid still functions normally but is under low-level immune attack.
Monitor TSH (the signal hormone your brain sends to your thyroid) and thyroid function every 6–12 months. Selenium supplementation (200 mcg/day) has been shown to reduce TPO antibody levels. Discuss with your doctor.
TPO Antibodies: {{value}} {{unit}} — borderline high (35–100 IU/mL)Elevated TPO antibodies (immune proteins that target your thyroid) is consistent with Hashimoto's thyroiditis (the most common cause of hypothyroidism worldwide) or Graves' disease. Your immune system has identified thyroid tissue as foreign and is producing antibodies against it, causing progressive thyroid damage and eventually underactive thyroid function.
See your doctor for regular thyroid function monitoring. Selenium supplementation may reduce antibody levels. Some integrative doctors also explore dietary interventions (gluten-free diets are sometimes recommended in Hashimoto's). Thyroid hormone replacement becomes necessary when hypothyroidism develops.
TPO Antibodies: {{value}} {{unit}} — above reference range (>100 IU/mL)Very high TPO antibodies (immune proteins that target your thyroid) indicate a very active autoimmune process targeting the thyroid. At this level, significant thyroid damage is likely occurring, and thyroid function may be very compromised or at high risk of failing.
See your doctor promptly for thyroid function assessment and consideration of treatment. Regular monitoring and likely thyroid hormone replacement are needed.
TPO Antibodies: {{value}} {{unit}} — very high (>1000 IU/mL)Upload your lab report and get your actual values interpreted in plain English — instantly, with no medical training required.