Thyroid Test Large incl RT3
Our most detailed thyroid check — TSH, FT3, FT4, antibodies & reverse T3, at home. More than TSH alone. Home visit; UKAS lab, results in 1–3 days.
Product details: GBP 273 — OutOfStock — SKU TF7 — GetTested
About this test – Thyroid Test Large incl RT3
Key Benefits
At Home Blood Collection: Your blood sample is collected in the comfort of your home.
Appointment Arranged Directly: Your appointment is arranged directly with a healthcare professional.
No Clinic Visit or Postal Sample Return: No travel, clinic visit or sample return by post is required.
UKAS Accredited Laboratory: Your sample is analysed by a UKAS accredited laboratory.
Fast Online Results: Secure online results are typically available within 1 to 3 working days.
What This Test Measures
Thyroid Signalling
Includes TSH, which helps show how the brain and thyroid communicate to regulate thyroid hormone production.
Thyroid Hormone Levels
Includes FT4, FT3 and total thyroxine (T4), providing insight into circulating thyroid hormones and the active thyroid hormone available to the body.
Thyroid Conversion and Regulation
Includes reverse T3 (RT3), a marker that can provide additional context around thyroid hormone conversion and regulation.
Thyroid Autoimmunity
Includes thyroid peroxidase antibodies (TPOAb) and thyroglobulin antibodies (TgAb), which may be relevant when investigating autoimmune thyroid related patterns.
How It Works
1. Order Your Test
Purchase your test online.
2. Arrange Your Appointment
A healthcare professional will contact you within 48 hours to arrange your at home blood collection appointment.
3. Blood Sample Collection
Your blood sample is collected in the comfort of your home.
4. Laboratory Analysis
Your sample is analysed by a UKAS accredited laboratory.
5. Receive Your Results
Access your secure online results within 1 to 3 working days.
Laboratory Quality and Accreditation
Your sample is analysed by a UKAS accredited laboratory operating in accordance with ISO 15189 standards, the internationally recognised standard for medical laboratories.
The laboratory follows established procedures for sample handling, analysis and quality control to support accurate and reliable results. Your results are securely returned to GetTested and made available through your online account.
Preparation Instructions
Appointment Timing: A morning appointment is recommended where possible, as some thyroid related markers may vary throughout the day.
Before Testing: Stay well hydrated before your appointment.
Medication: Do not stop or change prescribed thyroid medication or other prescribed medication unless advised by a healthcare professional.
Biotin Supplements: Avoid high dose biotin supplements for at least 48 hours before testing, unless advised by a healthcare professional, as biotin may interfere with some thyroid blood test results.
Important
This test is not a substitute for urgent medical care. If you require immediate medical attention, contact your healthcare provider or emergency services.
Biomarkers included – Thyroid Test Large incl RT3
- Thyroid Stimulating Hormone: Thyroid Signalling — Thyroid Stimulating Hormone (TSH) is produced by the pituitary gland to regulate the production of hormones by the thyroid gland. It is a critical indicator of thyroid health, used to screen for conditions like hypothyroidism (underactive thyroid) or hyperthyroidism (overactive thyroid).
- Free Triiodothyronine (fT3): Thyroid Hormone Levels — Free Triiodothyronine (fT3) is the unbound, active form of the thyroid hormone triiodothyronine (T3). It is crucial for regulating metabolism, energy levels, body temperature, and heart function. Measuring fT3 provides a direct assessment of the biologically active thyroid hormone available to tissues, reflecting current thyroid function more accurately than total T3 in many cases.
- Total Thyroxine (T4): Thyroid Hormone Levels — Total Thyroxine (T4) measures the entire amount of thyroxine circulating in the bloodstream, which is the primary hormone secreted by the thyroid gland. It is vital for regulating the body's metabolism, energy production, and overall cellular function, helping to diagnose hyperthyroidism and hypothyroidism.
- Free Thyroxine (fT4): Thyroid Hormone Levels — Free Thyroxine (fT4) is the unbound, active form of the thyroid hormone thyroxine in the bloodstream. It's crucial for assessing thyroid function because it directly reflects the amount of hormone available to regulate metabolism, growth, and energy levels. Measuring fT4 helps diagnose and monitor conditions like hyperthyroidism (too much) or hypothyroidism (too little) thyroid hormone.
- Reverse T3 (RT3): Thyroid Conversion and Regulation — Reverse T3 (RT3) is an inactive form of the thyroid hormone T3 that is produced when the body seeks to conserve energy by slowing the metabolic rate. It is an important indicator of how the body is converting thyroid hormones, as elevated levels can signal physical or emotional stress, chronic illness, or nutritional deficiencies.
- TPOAb (Thyroid Peroxidase Antibodies): Thyroid Autoimmunity — TPOAb (Thyroid Peroxidase Antibodies) are autoantibodies that attack thyroid peroxidase, an enzyme critical for thyroid hormone production. Their presence indicates an autoimmune thyroid condition, such as Hashimoto's thyroiditis or Graves' disease, which can lead to hypothyroidism or hyperthyroidism, respectively. Measuring TPOAb helps diagnose and monitor these autoimmune thyroid disorders.
- Thyroglobulin Antibodies: Thyroid Autoimmunity — Thyroglobulin antibodies are proteins produced by the immune system that mistakenly attack thyroglobulin, a protein used by the thyroid gland to produce hormones. Testing for these antibodies is essential for diagnosing autoimmune thyroid disorders, such as Hashimoto's thyroiditis or Graves' disease, and for monitoring patients following thyroid cancer treatment.
Frequently asked questions – Thyroid Test Large incl RT3
Why is reverse T3 included?
Reverse T3 (RT3) can provide additional context around thyroid hormone conversion. It may be useful when thyroid related symptoms are present but standard thyroid markers do not give the full picture.
Can I reschedule my appointment?
Yes, appointments can be rearranged. Please provide sufficient notice before your scheduled appointment.
What happens if my sample cannot be analysed?
If a sample is unsuitable for analysis, our customer support team will contact you with information about the next steps.
Customer reviews – Thyroid Test Large incl RT3
4.7/5 (3)
- 4/5 — Really helpful to see my RT3 levels. The process was straightforward.
- 5/5 — The nurse visit was professional and I got my results back the next day. It's much more comprehensive than what my GP offers.
- 5/5 — Excellent service, very efficient.