What it measures
- TSH
- Free T4
- Free T3
How to prepare
No fasting needed. Drink plenty of water beforehand. Keep taking your usual medicines and tell us what you take. Stop biotin (vitamin B7) supplements 48 hours before unless your doctor advises otherwise.
Good to know: share any result outside the normal range with your GP, who can arrange NHS follow-up if needed.
Questions
How much is a thyroid function blood test?
£100 at our clinic at 169 Shirley Road, Croydon, including the blood draw.
How quickly will I get results?
Usually within 1 to 3 days, in a clear report showing each result against its normal range.
How do I prepare?
No fasting needed. Drink plenty of water beforehand. Keep taking your usual medicines and tell us what you take. Stop biotin (vitamin B7) supplements 48 hours before unless your doctor advises otherwise.
Do I need a GP referral?
No. You can book directly online or by phone.
Pregnant? See our NIPT from £295 and early gender blood test.