You were diagnosed with hypothyroidism two years ago. Your doctor put you on daily thyroxine (Levothyroxine 50 or 75 mcg). Your TSH numbers came back into the "normal" range on your follow-up tests, but you still feel awful: your hair is thinning, your joints ache, your brain feels foggy, and losing even half a kilo feels impossible.
Why? Because in over 90% of all hypothyroid cases, the thyroid gland itself is not the root problem—your immune system is! The real diagnosis is an autoimmune condition called Hashimoto's Thyroiditis, and the blood test that proves it is the Anti-TPO (Thyroid Peroxidase) Antibody Test.
What is Thyroid Peroxidase (TPO)?
Thyroid Peroxidase (TPO) is a vital enzyme your thyroid gland uses to combine iodine with the amino acid tyrosine to manufacture T3 and T4 hormones. In a healthy body, this factory works silently.
In Hashimoto's, your immune system mistakenly identifies the TPO enzyme as a foreign toxin and manufactures Anti-TPO antibodies that infiltrate and slowly destroy your thyroid tissue over years. Taking a daily thyroid pill replaces the missing hormone, but it does nothing to stop the underlying immune attack!
Why Testing Anti-TPO Changes Your Care Plan
- Explains Fluctuating Symptoms: As autoimmune flares destroy thyroid cells, stored hormones spill into the blood, causing brief episodes of anxiety and heart palpitations, followed by deep crashes into fatigue.
- Protects Future Pregnancies: High Anti-TPO antibodies are clinically linked to higher risks of first-trimester miscarriage and postpartum thyroiditis. Gynaecologists monitor antibody-positive mothers closely.
- Guides Targeted Nutrition: Knowing your condition is autoimmune helps doctors address gut inflammation, screen for celiac disease, and optimize selenium, zinc, and Vitamin D levels.
| Anti-TPO Level (IU/mL) | Status | Interpretation |
|---|---|---|
| Under 35 IU/mL | Negative | Normal. Thyroid sluggishness is likely non-autoimmune (e.g. nutritional or lifestyle). |
| Above 35 to 1000+ IU/mL | Positive | Confirms active autoimmune Hashimoto's Thyroiditis. |
Discover the real reason behind your thyroid struggles. BookMyPatho offers advanced Thyroid Antibody Profiles (Anti-TPO & Anti-TG) with convenient home collection in Delhi NCR.
Recommended Lab Tests & Packages to Book at Home
If you or a loved one are experiencing these symptoms, you can book these diagnostic tests directly with BookMyPatho. Our trained phlebotomists collect samples from your doorstep across Delhi NCR with digital reports delivered within 12 hours:
- Anti-TPO (Thyroid Peroxidase) Antibody: Confirms autoimmune Hashimoto’s Thyroiditis destroying thyroid tissues.
- Anti-Thyroglobulin (Anti-TG) Antibody: Complementary autoimmune thyroid marker.
- Comprehensive Thyroid Profile (TSH, FT3, FT4): Measures circulating active thyroid hormone levels.
Have questions or need assistance selecting the right package? Call or WhatsApp our Delhi NCR health desk at +91-8700227153.
