What factors can cause inaccurate thyroid function test results?

Several factors can cause inaccurate thyroid function test results. Medications like thyroid supplements, birth control pills, or steroids can alter hormone levels. Additionally, acute or chronic illnesses, such as liver disease or kidney dysfunction, may temporarily affect thyroid hormones. Pregnancy, fasting, or stress can also impact thyroid hormone levels. If your results are abnormal but inconsistent with symptoms, your doctor may suggest retesting or considering these factors. Always inform your doctor about your medications and health conditions to avoid misinterpretation of your test results.