Free Testosterone Test
Free Testosterone Test
The Free Testosterone Test is a specialised blood test designed to give a clearer picture of your bioavailable testosterone levels — the portion of testosterone that is active and usable by the body. While total testosterone is important, it includes both bound and unbound forms. Only free testosterone is biologically active, meaning it can enter cells and exert effects on tissues such as muscle, bone, and the reproductive system.
This test is especially useful when symptoms of hormonal imbalance are present — such as fatigue, low libido, reduced muscle mass, mood changes, or fertility issues — but total testosterone results appear normal. Supported by clinical research from institutions such as the University of Cambridge and the Endocrine Society, the Free Testosterone Test offers greater diagnostic precision for identifying conditions like hypogonadism, andropause, or polycystic ovary syndrome (PCOS) in women.
What Does It Test For?
The Free Testosterone Test assesses both total testosterone and the amount of testosterone that is free or bioavailable — not bound to proteins in the blood. To calculate this, the test measures key transport proteins including Sex Hormone Binding Globulin (SHBG) and Albumin, and uses these values to estimate Free Testosterone through a clinically validated calculation. This provides a more accurate representation of active testosterone levels than total testosterone alone, which is crucial for evaluating hormonal health and guiding treatment decisions.
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Specifications
Specifications
How to take a test
How to take a test
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Biomarkers
Biomarkers
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Clients Love Us
Stephanie L.
"The process was quick and easy. I had results back in two days with helpful insights from a doctor."
Armac Venson
"Everything arrived on time, and the packaging made it feel very professional and secure. Very impressed."
Rachel M.
"Excellent service from start to finish. The instructions were clear, and I felt supported throughout."
Anna Jackobson
"Simple to use and great customer service. I got peace of mind without leaving my house."
Eric X.
"I appreciated how discreet and well-packaged everything was. Made the whole process stress-free."
Anders Elroff
"I’ve tried other services, but none matched the speed and clarity I got from this test. Highly recommend."
How it Works
Order Your Test
Choose your test online and we’ll send you everything you need.
Take Your Sample
Use the simple finger-prick kit to collect your blood sample at home.
Post It Back
Return your sample in the prepaid envelope — no need to visit a clinic.
Get Reviewed Results
Your results are reviewed by a qualified lab technician and delivered securely online.
FAQ's
Do I need to visit a clinic to take the test?
Do I need to visit a clinic to take the test?
No — our tests are designed to be done entirely at home using a simple finger-prick kit. Just follow the instructions and post your sample back using the prepaid envelope.
How long do results take?
How long do results take?
Once your sample reaches our lab, results are usually available within 1–2 working days. You’ll be notified by email and can view everything securely online.
Are these tests verified and reliable?
Are these tests verified and reliable?
Yes. All our tests are processed in UKAS and ISO-accredited laboratories. Our clinical team includes NHS doctors, GPs, and registered nurses, ensuring medical accuracy and professional oversight.