Triiodothyronine (T3)
Triiodothyronine (T3) is one of the main hormones produced by the thyroid gland and plays a central role in regulating metabolism throughout the body. While thyroxine (T4) is produced in greater quantities, T3 is the biologically active form of thyroid hormone and is responsible for many of the physiological effects associated with thyroid function. It influences metabolic rate, heart function, digestive activity, muscle control, brain development, and bone health.
- Price: £50
- Code: T3
- TAT: 1 - 2 Working Days
- Sample Type: Blood
Clinical Significance
Measuring T3 levels can help clinicians evaluate thyroid gland function and diagnose thyroid disorders. Elevated T3 levels may indicate hyperthyroidism, a condition in which the thyroid gland produces excessive hormone. Symptoms may include weight loss, rapid heart rate, heat intolerance, anxiety, and tremors. Conversely, low T3 levels may occur in hypothyroidism or severe systemic illness.
Who Might Benefit From This Test?
Individuals experiencing symptoms of thyroid imbalance such as fatigue, unexplained weight change, palpitations, mood changes, or temperature intolerance may benefit from T3 testing. It is often requested alongside TSH and T4 to provide a more complete evaluation of thyroid function.
Sample Collection
A blood sample is collected by a trained healthcare professional using standard phlebotomy procedures. The test is quick and usually completed within a few minutes. The collected sample is then transported to an accredited laboratory where specialised analytical equipment is used to measure the relevant biochemical markers accurately.
Understanding Your Results
Results are interpreted in combination with other thyroid tests including TSH and T4. Abnormal values may indicate thyroid dysfunction or may reflect other medical conditions affecting metabolism.
FAQs
When will I receive my results?
Results are usually available within the stated turnaround time.
Should I discuss my results with a doctor?
Yes, results should always be reviewed with a qualified healthcare professional.
Why Choose Marylebone Diagnostic Centre?
Marylebone Diagnostic Centre provides reliable laboratory diagnostics supported by accredited partner laboratories and experienced clinical staff. Fast turnaround times and high analytical standards ensure that patients and clinicians receive dependable results to guide medical decision‑making.
Book Now
Book now at Marylebone Diagnostic Centre to complete your diagnostic tests and health parameters.
