Free testosterone, also called unbound testosterone, refers to the amount of testosterone available for your body to use - so is a more useful indicator than total testosterone alone.
Your testosterone levels can affect your energy, mood, muscle and bone strength, sex drive, cognitive function, and fertility. If you're having issues in any of these areas, this test will indicate whether your testosterone profile could be a contributing factor.
Upgrade your test
For a more in-depth look at your health - including a full testosterone profile - check out our men's health blood test or women's hormones blood test.
Learn more
Testosterone is essential for your sex drive, bone and muscle health, mood, and cognitive function. Your levels gradually drop as you age. If your levels are out of range you might feel tired, have a low sex drive, and have low mood. Measuring free (or unbound) testosterone gives you a more detailed picture of the testosterone available for your body to actually use.
Your test kit contains everything you need to collect your sample at home. Our instructions will guide you through it.
Your kit arrives in 2-4 days. Find out how to collect your sample at home.
Free post your sample to our lab and get your results in as little as 48 hours. Access your GP-reviewed report in your results dashboard.
Our doctors give you evidence-based tips to help you support your health.
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What's included in your home testing kit?
Your Thriva test kit includes:
- collection tube(s)
- plaster x 2
- return form x 1
- alcohol swab x 1
- lancet x 3
- prepaid envelope x 1
- cleansing wipe x 1
- collection tube label(s)
- protective plastic case x 1
How to collect your sample at home
Learn how to collect your finger-prick blood sample at home by following our instructions. You can access these on the app too. It takes around 30 minutes to complete the process at home.
Will a GP write your report?
Our doctors review your blood test results and upload a detailed report to your account dashboard. They also give you advice to help support your health or manage an existing condition.
How long does it take to get your results?
Understanding your health should be quick and easy. That’s why our doctors share your results within 48 hours. And you can access your data at any time.
How do you know when your results are ready?
We’ll email or text you to let you know your blood samples have been received, processed, and are ready to view on your results dashboard.