Private Thyroid Profile 1 (FT4/TSH) London
The Thyroid Profile 1 (FT4/TSH) venous blood test is a clinically reliable blood test to test thyroid function, designed to assess how effectively your thyroid gland is working.
This test includes:
Thyroid Profile 1 (FT4/TSH) (Venous)
Test fee £88 + £50 phlebotomy fee (per visit)
- Results in 1 day"
- UKAS accredited laboratory
- Professional phlebotomy service
- Confidential results portal
Biomarkers Tested:
Or call 020 7183 0692
Pay at clinic on the day of your appointment
Thyroid Profile 1 (FT4 / TSH) Blood Test in London
The Thyroid Profile 1 (FT4/TSH) venous blood test is a clinically reliable blood test to test thyroid function, designed to assess how effectively your thyroid gland is working. At Wimpole Street Medical & Dental, this test is commonly used to assess thyroid hormone levels and support laboratory-based evaluation of thyroid function.
This thyroid blood test measures two essential markers–TSH (Thyroid Stimulating Hormone) and Free T4 (FT4), which together provide a clear picture of thyroid hormone regulation in the body. It is suitable for initial testing or ongoing laboratory monitoring where thyroid function assessment is required.
What Is a Thyroid Function Blood Test?
A thyroid function blood test evaluates how well your thyroid gland produces and regulates hormones that control metabolism, energy levels, heart rate, body temperature, and overall wellbeing. When thyroid hormones are out of balance, even slightly, they can affect multiple systems in the body.
What Does Thyroid Profile 1 (FT4/TSH) Measure?
TSH Blood Test: The blood test TSH is often the first indicator of thyroid dysfunction. Altered TSH levels may be associated with underactive or overactive thyroid function and usually require further medical assessment.
Free T4 (FT4): FT4 measures the unbound, biologically active form of thyroxine. It helps confirm whether abnormal TSH levels are translating into altered thyroid hormone availability in the body.
By combining both markers, this thyroid function blood test delivers a balanced and clinically meaningful assessment.
Why You May Need a Thyroid Blood Test
A thyroid blood test may be recommended if you are experiencing symptoms that suggest hormonal imbalance or if you require routine monitoring. Common reasons include:
• Persistent fatigue or low energy
• Unexplained weight gain or weight loss
• Sensitivity to cold or heat
• Hair thinning or hair loss
• Changes in heart rate or palpitations
• Low mood, anxiety, or brain fog
• Irregular menstrual cycles
• Ongoing laboratory monitoring of thyroid-related health
This blood test to test thyroid function is also frequently used after medication changes or as part of a broader health assessment.
Who Should Consider Thyroid Function Tests?
Thyroid function tests are suitable for adults who:
• Have symptoms suggestive of thyroid imbalance
• Have a family history of thyroid disease
• Are monitoring known thyroid conditions
• Are undergoing fertility assessment
• Require medication review or dose adjustment
• Want reassurance through proactive health screening
The thyroid profile test is commonly used as an initial investigation before more extensive thyroid blood tests are considered.
How the Test Works
1. Book Your Appointment: Select a time online or call us to visit our clinic at 22 Wimpole Street.
2. Professional Collection: This is a venous test (not a finger prick), meaning a nurse will draw a small sample from a vein in your arm. This ensures the highest accuracy for thyroid blood tests.
3. Lab Analysis: Your sample is sent to our UKAS-accredited laboratory.
4. Results & Review: Receive your results via a secure email link within 1 working day.
Thyroid Blood Test Results & Turnaround Time
• Results available in 1 working day
• Results delivered via a secure, confidential online portal
• Clear numerical values for TSH and FT4
Your results may be shared with your GP, endocrinologist, or healthcare provider of your choice for further medical review if required.
Understanding Your Thyroid Function Test Results
• Normal TSH and FT4: Values within expected reference ranges
• High TSH with low FT4: Laboratory pattern commonly associated with reduced thyroid hormone activity
• Low TSH with high FT4: Laboratory pattern commonly associated with increased thyroid hormone activity
• Borderline results: May require repeat testing or additional laboratory assessment
Laboratory results are provided without clinical interpretation and should be reviewed by a healthcare professional in the context of symptoms and medical history.
Why Choose South Ken MD for Thyroid Blood Tests in London?
Patients choose us for thyroid blood tests in London because we offer:
• Experienced, professional phlebotomy
• UKAS-accredited laboratory analysis
• Fast, reliable turnaround times
• Central London location in Wimpole Street
• Transparent pricing with no hidden fees
• Strict confidentiality and secure results access
Our clinic is conveniently located at 22 Wimpole Street, close to Bond Street Station, making access easy from across London.
What's Included
This test analyses the following 2 biomarkers
Why You May Need a Thyroid Blood Test
A thyroid blood test may be recommended if you are experiencing symptoms that suggest hormonal imbalance or if you require routine monitoring.
- Persistent fatigue or low energy
- Unexplained weight gain or weight loss
- Sensitivity to cold or heat
- Hair thinning or hair loss
- Changes in heart rate or palpitations
- Low mood, anxiety, or brain fog
Your Appointment, Step by Step
Reserve Online
Pick a date and time that fits your diary
Come to Marylebone
22 Wimpole Street, near Bond Street & Oxford Circus
Sample Taken by a Nurse
A brief, gentle blood draw, around 5 minutes
Report Delivered Securely
Results in 1 day"
Frequently Asked Questions
What patients most often want to know before this test
Book Your Thyroid Blood Test in London
If you are looking for a thyroid blood test, thyroid function test, or a reliable blood test to test thyroid function in London, this profile offers fast, accurate insight into your hormonal health.
Find Us in Marylebone
In the heart of London's Harley Street medical district, moments from Oxford Street
Address
Wimpole Street Medical & Dental
22 Wimpole Street
Marylebone
London W1G 8GQ
Getting Here
- Short walk from Bond Street station (Elizabeth, Central & Jubilee lines)
- Oxford Circus (Victoria, Central & Bakerloo lines) also nearby
Opening Hours (from 1 November 2026)
- Monday, Wednesday9am - 6pm
- Tuesday, Thursday9am - 8pm
- Friday8am - 5pm
- Saturday10am - 4pm
- SundayClosed
Contact
Arrange Your Test in Marylebone
You won't need a GP referral, simply reserve a slot online and visit us at 22 Wimpole Street. Your report follows within 1 day".
Google reviews of our sister clinic, South Kensington Medical & Dental.
Meet Our Medical Team
Our experienced medical team is fully qualified and registered with the GMC and NMC, delivering safe, high-quality care in line with the highest professional standards.
Because our patients deserve nothing less.
Registered. Regulated. Trusted.
At Wimpole Street Medical & Dental, our clinicians are registered with the relevant UK regulatory bodies, including the GDC, GMC and NMC. Our dentists, dental nurses and medical professionals deliver care that meets the highest clinical, safety and ethical standards, because our patients deserve nothing less.
We Accept All Major Dental Insurances
We accept all major UK dental insurances, including AXA PPP Healthcare Dental Cover, Aviva Dental Insurance, Bupa Dental Cover, Cigna Dental Insurance, Vitality Dental Health Insurance, Unum and Boots Dental Plan Cover. We provide itemised receipts so you can claim back your treatment costs.
