Free Testosterone
Free Testosterone refers to the fraction of testosterone in the bloodstream that is not bound to proteins such as sex hormone binding globulin (SHBG) or albumin. Only a small percentage of testosterone circulates freely, but this portion is biologically active and able to enter cells and exert hormonal effects.
Because most testosterone is protein‑bound, measuring free testosterone can provide a more accurate assessment of hormonal activity than total testosterone alone. This test is often calculated using total testosterone, SHBG, and albumin levels.
- Price: £89
- Code: TESF
- TAT: 1 - 2 Working Days
- Sample Type: Blood
Clinical Significance
Free testosterone testing is particularly useful when total testosterone levels appear normal but symptoms of hormone imbalance persist. Conditions that alter SHBG levels can significantly affect how much testosterone is biologically available to tissues.
Low free testosterone levels in men may contribute to fatigue, reduced libido, erectile dysfunction, and loss of muscle mass. In women, elevated free testosterone levels may be associated with androgen excess disorders such as PCOS.
Who Might Benefit From This Test?
This test may be recommended for individuals experiencing symptoms of androgen imbalance even when total testosterone levels appear within the normal range. It is commonly requested for fertility investigations, endocrine evaluations, and assessment of PCOS.
Clinicians frequently measure free testosterone when evaluating unexplained fatigue, sexual dysfunction, infertility, or abnormal hair growth patterns.
Sample Collection
A blood sample is collected by a trained healthcare professional. The test is typically performed alongside total testosterone, SHBG, and albumin measurements to allow accurate calculation of free testosterone.
Understanding Your Results
Results are interpreted together with other hormone levels. Abnormal free testosterone values may prompt additional endocrine testing to determine the underlying cause of hormonal imbalance.
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 offers reliable hormone profiling with fast turnaround times and professional clinical support, helping patients obtain clear insights into their endocrine health.
Book Now
Book now at Marylebone Diagnostic Centre to complete your diagnostic tests and health parameters.
