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Thyroid

TPO antibodies: the TPO antibody test for thyroid autoimmunity

TPO antibodies indicate potential autoimmune thyroid activity. For active individuals, undetected thyroid autoimmunity may subtly affect training capacity, recovery, and metabolic efficiency. Including TPO testing in your health monitoring can support optimal performance readiness.

Doctor's Assessment Included

What It Measures

This test measures antibodies against thyroid peroxidase (TPO), an enzyme essential for thyroid hormone synthesis. The presence of TPO antibodies may indicate that the immune system is targeting the thyroid gland. This marker is commonly used by healthcare providers to evaluate autoimmune thyroid disease.

Why It Matters

Thyroid autoimmunity detected through TPO testing may explain unexplained fatigue, slow recovery, or performance plateaus in active individuals. Identifying these antibodies early allows your healthcare provider to monitor thyroid function closely and intervene before significant performance impact occurs.

When to Test

Your healthcare provider may recommend TPO antibody testing when an autoimmune thyroid condition is suspected, when TSH levels are abnormal, or when there is a family history of thyroid disease. It may also be considered during pregnancy planning, as thyroid autoimmunity can potentially affect pregnancy outcomes.

Symptoms

Low Levels

Low or undetectable TPO antibody levels are generally considered normal and typically do not cause symptoms. The absence of these antibodies may suggest that autoimmune thyroid disease is less likely. However, your healthcare provider will consider your full clinical picture when interpreting results.

High Levels

Some people with elevated TPO antibodies may experience symptoms of hypothyroidism, such as fatigue, weight gain, cold sensitivity, dry skin, or low mood. Others may remain asymptomatic for years. The presence of antibodies does not always mean thyroid dysfunction is currently present. Consult your healthcare provider for evaluation.

Recommendations

Male

If Low

Normal TPO antibodies indicate no autoimmune thyroid disease. Maintain regular thyroid monitoring.

If High

Elevated TPO antibodies indicate autoimmune thyroid disease (Hashimoto's or Graves'). Consider thyroid ultrasound and endocrinology consultation.

Female

If Low

Normal TPO antibodies indicate no autoimmune thyroid disease. Maintain regular thyroid monitoring.

If High

Elevated TPO antibodies indicate autoimmune thyroid disease (Hashimoto's or Graves'). Consider thyroid ultrasound and endocrinology consultation.

Lifestyle Tips

Some people find that an anti-inflammatory diet, stress management, adequate vitamin D and selenium intake, and regular exercise may support thyroid health when TPO antibodies are present. Avoiding excessive iodine intake is sometimes discussed. Always consult your healthcare provider before making significant dietary or lifestyle changes.

Frequently Asked Questions

Does having TPO antibodies mean I have Hashimoto's disease?
Elevated TPO antibodies are commonly found in Hashimoto's thyroiditis, but their presence alone does not confirm the diagnosis. Some people with TPO antibodies maintain normal thyroid function for years. Your healthcare provider will consider your full clinical picture, including TSH levels, to make a diagnosis.
Can TPO antibody levels decrease over time?
TPO antibody levels may fluctuate over time. Some people may see levels change with treatment or lifestyle modifications. However, the clinical significance of these changes varies. Your healthcare provider can advise on what monitoring approach is appropriate for you.
Should TPO antibodies be tested during pregnancy?
Your healthcare provider may recommend TPO antibody testing during pregnancy or when planning pregnancy, as thyroid autoimmunity may be associated with increased risk of certain pregnancy complications. Discuss your individual situation with your healthcare provider for personalised guidance.

Tests with related values

These panels measure values from the same category as this marker.

Complete Health

360 Health

Broad health panel: hormones, thyroid, vitamins, lipids, liver, kidney, and blood count.

HbA1c (Glycated Hemoglobin) TSH (Thyroid Stimulating Hormone) Triglycerides Urea (BUN) Creatinine eGFR (Estimated Glomerular Filtration Rate) Free T4 (Thyroxine) LDL Cholesterol Liver Function Test (LFT) SHBG (Sex Hormone Binding Globulin) Vitamin B12 Vitamin D (25-OH) Total Testosterone Free T3 (Triiodothyronine) Ferritin HDL Cholesterol Albumin Total Cholesterol Basic Blood Count
€346,-
Health Checkups

InsideTracker

A 36-biomarker performance and longevity panel inspired by InsideTracker Ultimate — covering heart, hormones, metabolism, inflammation, recovery and iron status.

SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol GGT (Gamma-Glutamyl Transferase) Cortisol DHEA-S Estradiol (E2) Free Testosterone Total Testosterone Folate (Folic Acid) Vitamin B12 Calcium Ferritin Iron (Serum) Magnesium Magnesium (Intracellular) Potassium Progesterone Sodium Transferrin CRP (C-Reactive Protein) Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Total Cholesterol Albumin AST (Aspartate Aminotransferase) Vitamin D (25-OH) Insulin (Fasting) Leukocyte Differential Creatine Kinase (CK) Transferrin Saturation Triglycerides Basic Blood Count
€399,-

Whoop

A 44-biomarker comprehensive health panel inspired by WHOOP Advanced Labs — a deep look at metabolism, cardiovascular risk, hormones, liver, kidney and inflammation.

SHBG (Sex Hormone Binding Globulin) TSH (Thyroid Stimulating Hormone) ALT (Alanine Aminotransferase) LDL Cholesterol Cortisol DHEA-S Estradiol (E2) Free Testosterone FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Total Testosterone Bicarbonate Calcium Chloride Ferritin Iron (Serum) Magnesium Potassium Sodium Transferrin CRP (C-Reactive Protein) Homocysteine Glucose (Fasting) HbA1c (Glycated Hemoglobin) ApoB (Apolipoprotein B) HDL Cholesterol Omega-3 Index Total Cholesterol Albumin HOMA-IR ALP (Alkaline Phosphatase) AST (Aspartate Aminotransferase) Bilirubin (Total) Total Protein Urea (BUN) Creatinine Vitamin D (25-OH) eGFR (Estimated Glomerular Filtration Rate) Insulin (Fasting) Leukocyte Differential Transferrin Saturation Lipoprotein(a) Triglycerides Basic Blood Count
€499,-

TPO Antibodies

€59,-