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Free Testosterone Blood Test

Free Testosterone Blood Test


A finger-prick blood test which measures the amount of testosterone that is free to bind with the body’s tissues. For men who suspect low testosterone.
Blood sample 4 biomarkers included Results estimated in 2 working days from sample receipt at lab
Free Testosterone Blood Test
Free Testosterone Blood Test
Free Testosterone Blood Test
Free Testosterone Blood Test
Free Testosterone Blood Test

Is it for you?

Are you experiencing symptoms of low testosterone such as low libido, low energy and mood or lack of muscle and want to check whether your levels are normal? Have you previously had a borderline low testosterone result and want to know how much of the testosterone in your body is available to use? Or perhaps you received a normal testosterone result but still experience symptoms associated with low testosterone? If so, then this test is for you.

What's included?

Biomarker profiles

  • Proteins
  • Hormones

Proteins (2 Biomarkers)

Hormones (2 Biomarkers)

Special instructions

Please take your sample in the morning. Avoid taking a finger-prick sample from a finger used to handle hormone-gels or hormone-pessaries in the past 4 weeks. Do not take biotin supplements for 2 days prior to this test. If you are taking prescribed biotin you should discuss this with your doctor.

From the expert

Total testosterone is the amount of testosterone present in the body. However, not all this testosterone is actually available for the body to use. This is because some of it is bound to a protein called sex hormone binding globulin (SHBG) and so cannot be released for the cells to use. A proportion of testosterone is also loosely bound to another protein called albumin. The rest of the testosterone in the body, about 1-2%, is unbound or ‘free’ and therefore available for the cells to use.

This test looks at total testosterone, albumin and SHBG to give a calculation of the amount of testosterone available in the body for use by the cells.

This test is ideal for men who want to investigate symptoms of low testosterone, or for those who have previously had a normal or borderline low result but still suffer symptoms so want to investigate how much is available to their body’s tissues.

Dr Sam Rodgers MBBS, MRCGP
Chief Medical Officer


Laboratories you can trust

Trusted by the NHS and private clinics alike, you can be sure of the highest testing standards from our UKAS accredited partner laboratories.

Dr Sam Rodgers - Chief Medical Officer

Expert advice with your results

Get trusted advice and comments from one of our doctors based on your results.

Your personal health centre

Your personal health centre

Discover the easy way to track your health through our online portal, View your results with doctor's advice, monitor any changes over time and see the improvements you can make to your health with simple lifestyle changes.

Questions? Let us help
Questions? Let us help

Questions? Let us help

Our customer care team is on-hand to help you find the test that's right for you. Get in touch via phone, live chat or email.


Our tests are not a substitute for seeing your doctor, especially if you are suffering symptoms. Our doctors will interpret your results based on the information you have provided, but will not diagnose, consult or provide any treatment. You will be advised to see your doctor for any necessary follow-up action.