Full Thyroid Profile
A complete assessment of thyroid hormones including TSH, T3, T4, and thyroid antibodies. Ideal for diagnosing or monitoring thyroid conditions and symptoms such as fatigue, weight changes, or mood shifts.
- Description
- Why This Test?
- Associated Conditions
- Uses of This Test
The Full Thyroid Profile blood test provides a comprehensive assessment of thyroid function, hormone balance, and autoimmune activity. It measures the key hormones responsible for regulating metabolism, energy levels, temperature control, mood, and weight, alongside thyroid antibodies that can identify autoimmune causes of thyroid dysfunction.
Unlike basic thyroid screening, which typically measures a single hormone marker, this comprehensive panel delivers a broader clinical picture. It supports more accurate detection of early-stage dysfunction, complex hormonal patterns, and autoimmune involvement that may not be visible through standard testing alone.
This test is commonly used for proactive health screening, symptom investigation, and long-term thyroid management. Results are reviewed by qualified clinicians and presented in a clear, easy-to-understand report to support informed decision-making.
The thyroid gland plays a critical role in regulating metabolism, energy production, body temperature, heart rate, digestion, and mental wellbeing. Even small imbalances in thyroid hormone levels can significantly affect how the body functions, often producing symptoms that are subtle, slow-developing, or easily mistaken for lifestyle or stress-related issues.
It is estimated that over 4% of people may have undiagnosed thyroid dysfunction, particularly underactive thyroid (hypothyroidism). Without testing, symptoms can persist for months or years before a diagnosis is made.
Common symptoms associated with thyroid imbalance include:
- Persistent fatigue and low energy
- Unexplained weight gain or weight loss
- Cold sensitivity or heat intolerance
- Dry skin, brittle hair, or hair thinning
- Constipation or digestive changes
- Menstrual irregularities or fertility concerns
- Low mood, anxiety, poor concentration, or brain fog
- Palpitations or changes in heart rate
Thyroid disorders affect both men and women, although women are at higher risk, with approximately 1 in 8 women experiencing a thyroid condition during their lifetime. Autoimmune thyroid disease is particularly common and can develop gradually without obvious early symptoms.
Testing provides objective insight into whether symptoms may be linked to thyroid hormone imbalance or autoimmune activity. Early identification allows for appropriate monitoring, lifestyle interventions, or medical treatment where required — helping prevent longer-term complications and improving quality of life.
Hypothyroidism (Underactive Thyroid)
A condition where the thyroid does not produce enough thyroid hormones, leading to symptoms such as fatigue, weight gain, cold intolerance, low mood, and slowed metabolism. Elevated TSH with low Free T4 and/or Free T3 may indicate hypothyroidism.
Hyperthyroidism (Overactive Thyroid)
Occurs when the thyroid produces excessive hormones, accelerating metabolism and causing symptoms such as weight loss, anxiety, palpitations, heat intolerance, and tremors. Low TSH with elevated Free T3 and/or Free T4 can suggest hyperthyroidism.
Hashimoto’s Thyroiditis
An autoimmune condition where the immune system attacks the thyroid gland, often leading to progressive hypothyroidism. Elevated Thyroid Peroxidase Antibodies (TPOAb) and/or Thyroglobulin Antibodies (TgAb) commonly indicate Hashimoto’s disease.
Autoimmune Thyroid Disease
Refers to immune-mediated thyroid disorders where antibody activity affects hormone production and gland function. Antibody testing helps identify autoimmune involvement even before hormone levels become abnormal.
Subclinical Thyroid Dysfunction
A mild or early form of thyroid imbalance where TSH is abnormal but Free T3 and Free T4 remain within reference ranges. Monitoring can help prevent progression and guide early intervention.
- Investigate unexplained fatigue, weight changes, or low energy
- Identify early-stage thyroid dysfunction
- Monitor diagnosed thyroid conditions
- Assess autoimmune thyroid activity
- Support fertility and pregnancy planning
- Evaluate hormone-related mood or cognitive symptoms
- Track response to thyroid treatment
- Support long-term metabolic health monitoring
What We Test
Biomarkers analysed by accredited UK laboratories
Biomarkers Tested
Thyroid Hormones and Autoantibodies
These markers assess how effectively the thyroid gland is regulated, how much hormone is produced, how efficiently hormones are activated in the body, and whether autoimmune activity is affecting thyroid function.
- Thyroid Stimulating Hormone (TSH)
TSH is produced by the pituitary gland and controls how much hormone the thyroid releases. Abnormal levels may indicate underactive or overactive thyroid function and help assess how well the thyroid is responding to hormonal signalling.
- Free T4 (Thyroxine)
Free T4 reflects the amount of thyroid hormone available in the bloodstream. It helps evaluate hormone production and thyroid output. Low levels may indicate reduced thyroid activity, while elevated levels may suggest excessive production.
- Free T3 (Triiodothyronine)
Free T3 is the active thyroid hormone responsible for regulating metabolism, energy levels, temperature control, and heart rate. It provides insight into how effectively the body converts T4 into its active form.
- Thyroid Peroxidase Antibodies (TPOAb)
TPO antibodies indicate immune activity targeting the thyroid gland. Elevated levels are commonly associated with autoimmune thyroid conditions and may appear before hormone levels become abnormal.
- Thyroglobulin Antibodies (TgAb)
Thyroglobulin antibodies support the detection of immune-driven thyroid inflammation and autoimmune involvement. They are useful for diagnosis and long-term monitoring.
- Thyroid Stimulating Hormone (TSH)
In-Clinic Blood Testing At Longridge, Preston
If you’d rather leave everything to a qualified professional, our in-clinic blood testing service is the most comfortable and hands-off experience. Once you complete your order, we’ll contact you to arrange a convenient appointment time.
Your sample will be taken by a trained phlebotomist, making the process quick, smooth, and reassuring - especially if you’re nervous around blood or struggle with finger-prick tests.
We send off all samples the same day to the lab to be processed so results can be expected within 72 hours.
Why Use This Service:
Hands-off, professional experience
High-quality samples for complex tests
No risk of “not enough sample”
Support at every step
No posting or packaging required
Convinient appointment times
Taking Charge Of Your Own Health Has Never Been Easier
Worried about your wellbeing?
If you’re experiencing unexplained symptoms such as fatigue, weight loss, or other issues, a comprehensive blood test may be the key to discovering potential underlying health problems.
Need to monitor a health condition?
Blood tests offer essential insights into various aspects of your health, from detecting deficiencies to evaluating immune functions.
Enhancing Performance and Fitness?
Whether you’re training for a sport or keeping track of your fitness progress, a blood test serves as an excellent foundation for your performance improvement journey.
All Our Tests Include:
No GP Referral
Order directly - no waiting for appointments
Fast Results
Detailed analysis within 72 hours
Doctor's Commentary
Expert interpretation of your results included
Secure & Confidential
Discreet service and consultations
Frequently Asked Questions
- Qualified Pharmacists
- Flexible Appointments
- Top Customer Service
How accurate are home finger-prick tests compared to clinic tests?
Our home finger-prick tests use the same accredited laboratories as our clinic tests. While clinic tests allow for more comprehensive panels, home tests are highly accurate for the parameters they measure.
Do I need a GP referral for a blood test?
No, you don’t need a GP referral. You can book directly with us for any blood test. We are a private clinic offering direct access to comprehensive blood testing.
How old do I have to be to have a blood test?
We will only draw blood from those aged 16 and above due to legal requirements.
How long does it take for the blood test results to come?
If you have used our clinic to complete a blood test, we send off all samples the same day to the lab to be processed. If you have used a home test kit, then once your sample has been sent off the lab will analyse your sample. Results are usually received within 72 hours.
How do I perform the home finger-prick test?
Your home blood test kit will contain easy-to-follow instructions on how to take your own finger blood sample. If you have any concerns or questions prior to using the kit, please contact our phlebotomists who will be happy to assist.
How do I prepare for a blood test?
There is no preparation required prior to taking any of the blood tests. Please simply remember to stay hydrated prior to your appointment. This is to help your veins dilate better to enable a quick and efficient blood sample to be taken and reduce the risks of feeling faint following your blood test.
Please inform the phlebotomist before your test if you are currently taking any blood thinning medication.
Should I fast before my blood test?
Fasting is not required for most blood tests. However, if your profile includes cholesterol tests and you’ve previously had high levels, consider fasting for 8 hours beforehand. While not essential, fasting can provide more accurate results.
Note: Fasting means abstaining from any food and drink, except for water.