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Thyroid Blood Test
Get a Thyroid Blood Test to monitor your metabolic health, energy levels, and hormonal balance. Our three Profiles offer a comprehensive insight.
1. Basic Thyroid Function Profile
Core Screening for Metabolic Balance
The Basic Thyroid Blood Test is the essential first step in understanding how your body is managing its energy. Think of your thyroid as your body’s “thermostat”—it regulates everything from how fast your heart beats to how quickly you burn calories.
Is this Thyroid Blood test right for me?
This profile is designed as an entry-level check or for ongoing management. It is the ideal choice if you:
- Need a Routine Check: You have a known thyroid condition and need to monitor your levels regularly.
- Are Noticing Early Changes: You’ve started feeling unexplained fatigue, “brain fog,” or a sudden change in your weight.
- Feel Sensitive to Temperature: You feel unusually cold or struggle with the heat.
- Want a Baseline: You want a clear, clinical snapshot of your metabolic health without the deeper autoimmune or nutrient markers.
What we look at (and why it matters):
To give you an accurate “engine check,” our Thyroid Blood Test measures the three most critical markers in your bloodstream:
- TSH (Thyroid Stimulating Hormone): This is the “messenger” from your brain. It tells us if your body is asking for more energy or trying to slow down.
- FT4 (Thyroxine): The main storage hormone produced by your thyroid. It acts as the “fuel tank” for your metabolism.
- FT3 (Free Triiodothyronine): This is the active form of the hormone that your cells use. It is the “spark plug” that drives your energy levels and heart rate.
Our Approach: At Windsor Mews Clinic, we believe that clear answers are the foundation of great health. We provide the clinical accuracy you need to establish your baseline, helping you move from “feeling off” to finding facts.
The Essentials Checklist:
- TSH (Thyroid Stimulating Hormone)
- Free T4 (Thyroxine)
- Free T3 (Triiodothyronine)
Pre-Test Protocols:
Fasting is not required. Schedule the blood draw early in the morning when TSH levels are highest. If you take thyroid hormone replacement therapy, take your dose after the blood draw.
2. Advanced Thyroid Profile
The Next Step
The Advanced Thyroid Profile provides a comprehensive assessment for individuals with persistent metabolic, energy, or weight concerns despite initially normal results. This panel measures free and total thyroid hormones, along with key autoimmune antibodies. Testing for Thyroid Peroxidase (TPO) and Thyroglobulin (TgAb) antibodies helps identify autoimmune conditions before they alter TSH levels.
What These Tests Look for and Why
- TSH (Thyroid Stimulating Hormone): The central nervous system signal directing thyroid production.
- FT4 (Free Thyroxine): The unbound primary pro-hormone available for tissue conversion.
- FT3 (Free Triiodothyronine): The unbound, biologically active hormone that drives metabolism.
- T4 (Total Thyroxine): The total amount of primary hormone, including both bound and unbound forms.
- TPOAb (Thyroid Peroxidase Antibodies): Autoantibodies targeting the enzyme essential for thyroid hormone production.
- TgAb (Thyroglobulin Antibodies): Autoantibodies targeting thyroglobulin, the protein involved in thyroid hormone synthesis.
Who It Is For?
This panel is designed for patients with complex hypothyroid or hyperthyroid symptoms when standard screenings are inconclusive. It is especially recommended for those having a family history of autoimmune disorders, chronic fatigue, unexplained hair thinning, or persistent changes in weight distribution.
3. Advanced Thyroid Health Profile
Deep Dive into Autoimmunity & Nutrient Support
If your basic thyroid blood test levels are “normal” but you still don’t feel right, the Advanced Thyroid Health Profile is the next logical step. This profile goes beneath the surface to identify why your thyroid might be struggling, focusing on your immune system and the “fuel” your body needs to produce hormones.
Is this test right for me?
This profile is our most popular choice for those who want a more “investigative” look at their health. It is specifically designed for:
- The “Invisible” Symptom: You have typical thyroid symptoms (fatigue, weight gain, thinning hair) but have been told your TSH is “fine.”
- Autoimmune Concerns: You want to screen for conditions such as Hashimoto’s or Graves’ Disease, where the body’s immune system attacks the thyroid.
- Inflammation Tracking: You feel “puffy” or achy and want to see if systemic inflammation is impacting your energy.
- Nutrient Optimisation: You want to ensure your body has the right levels of vitamins and minerals to use the hormones it produces.
What we look at in a Thyroid Blood Test - Why it matters:
In addition to the core thyroid markers, we include three critical diagnostic layers:
- Thyroid Antibody Panel (TPO & TGAB): These markers tell us if your immune system is mistakenly attacking your thyroid gland. This is often the “missing piece” in chronic fatigue cases.
- Inflammation Marker (CRP): High-sensitivity CRP helps us identify if silent inflammation is “clogging” your metabolic pathways.
- The Essential Nutrient Panel: We measure Vitamin D, B12, Folate, and Ferritin (Iron). These are the raw materials your thyroid needs. Without enough “fuel” in the tank, even a healthy thyroid cannot function at 100%.
Our Goal: At Windsor Mews Clinic, we recognise that “normal” isn’t always “optimal.” We specialise in uncovering the hidden factors, from nutrient gaps to immune responses, that stand between you and feeling your absolute best.
The Investigative Checklist:
- Core Thyroid: TSH, FT4, FT3
- Antibodies: Thyroid Peroxidase (TPO), Thyroglobulin (TGAB)
- Inflammation: CRP (High Sensitivity)
- Vitamins: Vitamin D, Vitamin B12, Folate
- Iron Stores: Ferritin
The Comprehensive Checklist:
- Full Thyroid & Antibody Panel: TSH, FT4, FT3, TPO, TGAB
- Reproductive Markers: Oestradiol, Testosterone, Prolactin
- Control & Transport: FSH, LH, SHBG
- Core Health: CRP, Vitamin D, B12, Folate, Ferritin
4. Advanced Thyroid Plus Hormones Profile
looking for Total Hormone Harmony
Thyroid health doesn’t exist in a vacuum; it works in tandem with your reproductive hormones. If one is off-balance, the others often follow. This is our most comprehensive assessment, designed to map exactly how thyroid function affects your overall hormonal health.
Is this test right for me?
This profile is the best choice if you are struggling with “complex” symptoms that are hard to trace to a single root cause. It is specifically designed for those experiencing:
- Persistent physical changes: Such as unexplained hair loss or constant low energy.
- Cycle & Fertility concerns: Including irregular periods or difficulty conceiving.
- Mood & Outlook: Managing “brain fog,” mood swings, or a sudden drop in libido.
- Life Transitions: Helping to determine if symptoms are thyroid-related or linked to PCOS, Menopause, or Andropause.
What we look at (and why it matters):
We go beyond the basics to look at three key areas of your internal health:
- Complete Thyroid & Antibody Check: We check not just how much hormone you are making, but if your immune system is mistakenly attacking your thyroid.
- Sex Hormone Mapping: By measuring Oestradiol, Testosterone, and Prolactin, we can see how your reproductive health is impacting your drive and vitality.
- The “Brain-to-Body” Connection: We test markers like FSH and LH to see if your brain is sending the right signals to your body, and SHBG to ensure those hormones are reaching the cells that need them.
Our Vision: At Windsor Mews Clinic, we treat the body as a connected system, not a collection of parts. Our goal is to provide the high-resolution data necessary to restore your natural rhythm and achieve total hormonal harmony.
5. Advanced Thyroid Plus with RT3
The Complete Picture
The Advanced Thyroid Plus with RT3 is our most comprehensive endocrine assessment. It measures both thyroid hormone production and cellular utilisation. Its primary feature is Reverse T3 (RT3). In response to physical trauma, emotional stress, caloric restriction, or chronic inflammation, the body may convert T4 into Reverse T3, an inactive form that interferes with thyroid receptor function.
A Comprehensive Set of Tests for a Complete Assessment
- TSH (Thyroid Stimulating Hormone): Pituitary messenger that tracks overall system demand.
- FT4 (Free Thyroxine): Unbound pro-hormone available for peripheral metabolic conversion.
- FT3 (Free Triiodothyronine): Unbound active hormone that regulates systemic energy expenditure.
- Total T4 (Thyroxine): The full circulating reservoir of T4 hormone.
- Reverse T3 (RT3): An inactive form of T4 that reduces metabolic activity during periods of stress.
- TPOAb (Thyroid Peroxidase Antibodies): An immune marker that identifies active thyroid tissue inflammation.
- TgAb (Thyroglobulin Antibodies): An immune marker used to assess autoimmune risk.
Who It Is For?
This assessment is recommended for individuals with clear hypothyroid symptoms, such as persistent coldness, cognitive difficulties, weight gain, or severe fatigue, whose standard TSH, FT4, and FT3 results appear normal. It enables clinicians to calculate the FT3/RT3 ratio, which can reveal cellular resistance or impaired hormone conversion due to stress or systemic inflammation.
Pre-Test Protocols:
Please avoid biotin supplements for 48 to 72 hours before your appointment, as high-dose biotin may affect thyroid lab results. Schedule your blood draw for early morning.
Prefer To Take Your Test At Home?
Effortless Precision: The Tasso+ Home Collection Advantage
At Windsor Mews Clinic, we also offer the cutting-edge Tasso+ collection method. This is a virtually painless way to collect high-quality blood samples at home without a traditional needle and syringe.
- The Tasso+ device collects capillary blood for many of our top performance and hormone panels.
- Ultimate Convenience: Collect your sample quickly at home or In-Clinic. Choose the option that works best for your monitoring needs.
- Painless Experience: Ideal for needle-averse athletes, Tasso+ draws blood from the upper arm with a button press and minimal sensation.
- Verified Accuracy: Our laboratory partners ensure that samples collected via Tasso+ meet rigorous standards required for elite performance tracking. For your convenience, results from Tasso+ samples are usually available within 2-3 business days. You can quickly apply personalised insights to your training and recovery schedule.
For all advanced profiles, a morning fasting blood draw is typically recommended to ensure the most accurate readings of your metabolic and nutrient markers. Avoid taking biotin supplements for 48 hours before the test, as they can interfere with thyroid test results.
Why Choose Windsor Mews Clinic for Your Blood Tests?
Clinical Accuracy & Standards
At Windsor Mews Clinic, our blood testing profiles are developed using the latest UK clinical diagnostic standards. We ensure that every result meets the highest level of medical integrity.
- Laboratory Excellence: All samples are processed in UKAS-accredited laboratories, adhering to the same rigorous standards used by the NHS.
- Expert Oversight: Our thyroid and hormone panels are curated based on clinical guidelines provided by the British Thyroid Foundation and the Society for Endocrinology.
- Data Integrity: We use high-sensitivity assays (such as Roche or Abbott platforms) to ensure that even minor hormonal fluctuations are captured with precision.