Thyroid & Hormonal Function

The Thyroid & Hormonal Function test provides a comprehensive overview of key hormones that regulate metabolism, reproductive health, and overall vitality. It measures essential biomarkers including albumin, follicle-stimulating hormone (FSH), luteinising hormone (LH), oestradiol, sex hormone-binding globulin (SHBG), total testosterone, free (calculated) testosterone, thyroid-stimulating hormone (TSH), free thyroxine (Free T4), and free triiodothyronine (Free T3) to assess both thyroid activity and hormonal balance. This test helps identify thyroid dysfunction, hormonal imbalances, or reproductive health concerns that may contribute to symptoms such as fatigue, mood changes, weight fluctuations, or irregular cycles. It’s ideal for anyone seeking to understand their hormonal health, monitor thyroid performance, or take a proactive approach to metabolic and reproductive wellness. Frequently Asked Questions What thyroid markers are included? This panel tests TSH (thyroid stimulating hormone), free T3, free T4, and thyroid antibodies (TPO and TgAb). Testing all five markers gives a complete picture — the NHS typically only tests TSH initially. What symptoms suggest I should test my thyroid? Common symptoms of thyroid dysfunction include unexplained fatigue, weight gain or loss, sensitivity to cold or heat, hair loss, dry skin, mood changes, irregular periods, brain fog, and constipation. These can indicate an underactive or overactive thyroid. Will the NHS only test my TSH? NHS guidelines typically start with TSH alone and only test free T3, free T4, and antibodies if TSH is abnormal. This can miss subclinical thyroid issues. Lola tests the full panel from the start. I'm on thyroid medication — can I use this to monitor? Yes. Take the test before your morning thyroid medication dose for accurate results. Regular monitoring helps you and your prescribing doctor assess whether your dosage is optimal. Should I stop taking biotin before the test? Yes. Stop biotin (vitamin B7) supplements at least 48 hours before your test. Biotin can interfere with thyroid assay results and produce inaccurate readings. Can thyroid problems cause weight gain? Yes. An underactive thyroid (hypothyroidism) slows metabolism and can cause weight gain, fluid retention, and fatigue. If detected, treatment with thyroid medication often helps normalise weight.