Check your thyroid health with our at-home Free T3 Test. Fast, accurate, UK-accredited lab results. Order online today with discreet delivery and doctor-reviewed reports.
Your thyroid plays a vital role in regulating your body’s metabolism, energy, and overall wellbeing. When thyroid function is imbalanced, it can affect everything from your weight and mood to your heart rate and digestion. The Free T3 Test is a simple blood test that measures the level of free triiodothyronine (T3) in your bloodstream – the active thyroid hormone that drives how your body uses energy.
At Repose Healthcare, we offer a convenient at-home Free T3 Test kit, giving you reliable insights into your thyroid function without the need for a GP appointment or hospital visit.
Triiodothyronine (T3) is one of two main hormones produced by your thyroid gland, the other being thyroxine (T4). Most T3 in your body is bound to proteins in your blood, but a small fraction – known as free T3 – circulates unbound and is biologically active. This free form is the most accurate indicator of how much thyroid hormone is actually available to your cells.
Testing free T3 can help identify whether your thyroid is working normally, or if there may be an underactive (hypothyroidism) or overactive (hyperthyroidism) thyroid.
A Free T3 Test is useful if you are experiencing symptoms that may suggest a thyroid imbalance. These include:
Symptoms of Hyperthyroidism (overactive thyroid):
Unexplained weight loss
Increased heart rate or palpitations
Anxiety or restlessness
Sweating and heat intolerance
Tremors or shakiness
Frequent bowel movements
Symptoms of Hypothyroidism (underactive thyroid):
Fatigue and low energy
Weight gain or difficulty losing weight
Dry skin and hair loss
Depression or low mood
Sensitivity to cold
Constipation
Because free T3 is the active hormone, measuring it can sometimes provide more information than T4 or TSH (thyroid-stimulating hormone) tests alone, particularly in complex or borderline cases.
You may benefit from testing if:
You have persistent symptoms of thyroid imbalance despite normal TSH results.
You are being monitored for an existing thyroid condition such as Graves’ disease or Hashimoto’s thyroiditis.
You are on thyroid hormone replacement therapy and want to check your hormone levels.
You have a family history of thyroid disease.
You are concerned about unexplained changes in weight, mood, or energy.
With our at-home Free T3 blood test kit, the process is quick and straightforward:
Order online – Your kit will be delivered in discreet packaging.
Collect your sample – Use the included finger-prick device to collect a small blood sample from the comfort of your home.
Return your sample – Send it back to our accredited UK laboratory in the prepaid envelope.
Receive results – You’ll get secure online results with a clear explanation, usually within 1–2 working days of your sample arriving at the lab.
Your results will show your free T3 level, along with a reference range for comparison.
Low Free T3 may suggest hypothyroidism, poor conversion of T4 to T3, or other underlying health conditions.
High Free T3 may indicate hyperthyroidism, thyroid hormone resistance, or over-medication with thyroid hormone replacement.
It’s important to interpret these results in context, ideally alongside other thyroid tests such as TSH and Free T4. Our doctors can provide guidance on whether further testing or follow-up is recommended.
Convenience – Test from home, no GP appointment needed.
Accuracy – Samples processed in UKAS-accredited laboratories.
Speed – Fast turnaround time, with results available in just a couple of days.
Support – Clear, doctor-reviewed reports with next steps explained.
Privacy – Discreet packaging and GDPR-compliant handling of your health data.
1. Is a Free T3 Test the same as a thyroid function test?
Not exactly. A standard thyroid function test usually checks TSH and sometimes Free T4. Free T3 is an additional marker that provides deeper insight, particularly if your symptoms don’t match your TSH or T4 levels.
2. Can I take this test if I’m on thyroid medication?
Yes. Many people use the Free T3 Test to monitor their response to treatment. Your results should be reviewed in the context of your medication.
3. Do I need to fast before the test?
Fasting is not required. However, try to take your sample before your daily thyroid medication dose for the most accurate reading.
4. Will I need further tests?
Sometimes. Your doctor may also recommend checking TSH, Free T4, Reverse T3, or thyroid antibodies to get a full picture.
5. What happens if my results are abnormal?
If your Free T3 level falls outside the reference range, we’ll provide guidance on whether to consult your GP or a specialist endocrinologist for further evaluation and treatment.
Take control of your thyroid health with a reliable, convenient at-home blood test. Whether you’re monitoring an existing condition or simply want clarity about unexplained symptoms, the Free T3 Test gives you the answers you need quickly and discreetly.
Order online today and get peace of mind about your thyroid health.
You may also be interested in:
TSH Test – Checks thyroid-stimulating hormone.
Free T4 Test – Measures thyroxine, the precursor to T3.
Thyroid Function Panel – A combined test including TSH, Free T4, and Free T3.
Thyroid Antibody Test – Screens for autoimmune thyroid conditions.
Our home testing kits are designed to be simple, reliable, and easy to use. After placing your order, your kit will be delivered to your address with clear instructions for collecting your sample (e.g., blood, saliva, or urine or swab). Once collected, return your sample to our UKAS-accredited laboratory using the prepaid packaging. Your secure digital results will be available within 1–3 working days of the lab receiving your sample.
Yes. All tests offered by Repose Healthcare use clinically validated methods and are processed by fully accredited UK laboratories. The results are as accurate as those provided through traditional GP or private clinic services.
No. Our tests are available without the need for a prescription. They are intended for individuals who wish to proactively monitor their health in a private and convenient way.
Your results will be delivered through a secure online portal or an encrypted email, with a password sent separately to you, accompanied by easy-to-understand explanations and clear reference ranges. If any result requires clinical attention, we will guide you on appropriate next steps.
At Repose Healthcare, we prioritise your safety and peace of mind. If your results fall significantly outside the normal range, the following steps will be taken:
Our kits are suitable for adults who wish to monitor key health markers, including cholesterol, vitamin and hormone levels, blood sugar, infections, STIs, and genetic risk factors. Some tests may have age or gender-specific guidance, which will be clearly outlined on the product page.
Orders placed before 2:00pm are dispatched the same day. Kits are sent via tracked Royal Mail 24-hour service and typically arrive within 1–2 working days.
You may cancel your order for a full refund if the kit has not yet been dispatched. Once a kit has been shipped or used, we are unable to offer a refund for hygiene and regulatory reasons. If your kit arrives damaged or incomplete, please contact our customer care team within 14 days, and we will arrange a replacement at no cost.
Absolutely. Our partner laboratories are UKAS-accredited and operate under strict quality control protocols. These labs are used by both NHS and private healthcare providers, ensuring your results are handled with the highest standards.
Yes. Repose Healthcare takes data protection very seriously. We comply fully with the UK General Data Protection Regulation (UK GDPR) and all relevant data privacy laws. Your personal and medical data is encrypted, stored securely, and never shared with third parties without your explicit consent.
You can view our full Terms & Conditions, Privacy Policy, and Cookie Policy at the bottom of our website. These documents outline your rights, our responsibilities, and how we handle your data, orders, and any communications with you.
