WHY TEST PRIVATELY
"Your thyroid is normal" usually means one number was normal
Standard NHS thyroid testing starts and usually stops with TSH. Most labs use reflex testing: free T4 is only added if the TSH comes back outside the reference range. Free T3 is rarely measured in primary care at all, and thyroid antibodies are ordered selectively rather than routinely.
For most people that is perfectly adequate. But if you have persistent thyroid symptoms and a TSH that sits inside the reference range, the standard test has told you very little — and there is no obvious next step, because the first result looked fine.
A full profile measures all four at once. That means you find out whether your antibodies are raised (the most common cause of an underactive thyroid in the UK is autoimmune, and antibodies can be positive years before TSH shifts), and whether your free T3 is low even when everything else looks unremarkable.
- All four markers, every time. No reflex testing, no waiting for one result to unlock the next.
- Antibodies included. The marker that identifies autoimmune thyroid disease, which is rarely tested first-line.
- No referral, no threshold. Book directly — you don't need a symptom severe enough to qualify.
- Repeatable. Thyroid results move. Retest on your own schedule to see a trend rather than a snapshot.
