Autoimmune Thyroid Screen

Standard NHS thyroid screening typically measures TSH alone, and sometimes adds FT4 if TSH is abnormal. Antibody testing is usually only requested once hypothyroidism is already established. However, autoimmune thyroid disease can smoulder for years before TSH shifts — during which time antibodies are elevated and the immune attack is already under way. Private panels like this one offer the complete picture from a single collection, enabling earlier identification and monitoring.

In some cases, yes. TPO and TG antibody levels can fluctuate, and a small proportion of people experience spontaneous reduction in antibody titre and stabilisation of thyroid function. Factors including selenium supplementation, dietary changes, and stress management may influence antibody levels, though the evidence base varies. It is not possible to predict from a single result whether antibody levels will rise, stabilise, or fall. Serial testing every 6 to 12 months provides a trend rather than a snapshot.

Yes, this is particularly important. Elevated TPO antibodies are associated with a higher risk of miscarriage and pregnancy loss, even when thyroid function (TSH) remains within the normal range. Some fertility specialists and obstetricians recommend thyroid antibody screening for women with recurrent miscarriage or unexplained infertility. If antibodies are elevated, monitoring TSH throughout pregnancy is advisable since thyroid demand increases significantly in the first trimester. Please share your results with your GP or fertility specialist.

The exact cause of autoimmune thyroid disease is not fully understood, but it involves a combination of genetic susceptibility, hormonal factors (which is why women are 5 to 10 times more likely to be affected than men), environmental triggers such as iodine excess, infections, and stress. Pregnancy and the postpartum period are common triggers. Family history is a significant risk factor — having a first-degree relative with Hashimoto’s or Graves’ disease increases your own risk substantially.

Some studies suggest that gluten elimination may reduce TPO antibody levels in people who have concurrent coeliac disease or non-coeliac gluten sensitivity, and selenium supplementation (200 mcg daily) has shown modest antibody-reducing effects in several trials. However, the evidence is not conclusive enough to make firm recommendations. Any dietary changes or supplementation should be discussed with your GP before implementation. This test provides the baseline from which to monitor any interventions you choose to try under medical guidance.

Your result report from Trupoint Health will show your TPO and TG antibody values alongside the laboratory reference ranges and a narrative from our GMC-registered reviewing physician. In general, any value above the reference range is considered elevated. The degree of elevation does not necessarily correlate directly with symptom severity. Even mildly elevated values warrant monitoring. The physician commentary will guide you on appropriate next steps, including whether a GP consultation or specialist referral is advisable.

The markers in both panels are identical: TSH, FT4, FT3, TPO Ab, and TG Ab. The Autoimmune Thyroid Screen is positioned specifically for those with a clear reason to investigate autoimmunity — personal or family history, pregnancy planning, or persistent symptoms with previously normal results. The slight price difference reflects the clinical framing and reporting context. If you are unsure which panel is right for you, our physician commentary service can guide you after your results are available.