Bioavailable testosterone

This is an important test to help diagnose andropause or late-onset hypogonadism (low testosterone).

Venous blood
1 tests included
7 days turnaround



About Bioavailable testosterone

What is bioavailable testosterone?

Testosterone is a steroid hormone that plays a key role in the development of the male reproductive system, muscle mass and body hair. Testosterone levels decline with age in males, a process known as andropause, resulting in physiological changes including reduced muscle strength and bone density. Not all of the testosterone in the body is available for tissues to utilise.

Testosterone binds with sex hormone-binding globulin (SHBG) or albumin, regulating the amount the body can use at any given time. Testosterone that is not bound to SHBG or albumin and is available for the body to use is known as bioavailable testosterone. Symptoms of low testosterone include reduced bone and muscle mass and low sex drive.  

Why take the test?

This test measures the amount of bioavailable testosterone in the blood, along with the amount bound to albumin. It is generally used to diagnose andropause or late-onset hypogonadism (low testosterone).


What's tested


How it works



Purchase your Kit

Just order a test online and get your kit delivered right to your door unless you are ordering a COVID-19 Fit to Fly test where you will be given appointment options to attend our clinics across the United Kingdom for a nose and throat swab PCR test at the checkout stage.



Take your test and post

Follow our simple instructions to take your sample and post back the enclosed prepaid envelope to our accredited lab for processing. We also offer home or workplace visits by a qualified nurse. For COVID-19 Fit to Fly tests you must attend one of our partner clinics for our trained collection officers to take your sample. You will then have the results emailed to you.



Get results directly to your dashboard

You will receive an email notification from our medical team when your results are available on your secure personalised health dashboard.