Blood test
Testosterone Plus
Your total testosterone and the free part of it, the testosterone your body can actually use.

What it is for
- Testosterone Plus
Why people check it
Much of the testosterone in the blood is bound to proteins; only the free part is available to the body's cells. Looking at both gives a much more precise picture than total testosterone alone. In men and women it plays a part in libido, fertility, muscle and bone mass, hair loss and mental wellbeing.
- Testosterone Plus
Who it is for
Anyone taking testosterone supplements or on hormone replacement, who needs to check regularly that levels stay where they should, and women keeping an eye on polycystic ovary syndrome (PCOS). You can share the result with your doctor, who reads it alongside the rest of the picture.
- Signs
People often check it when they notice
- Lower libido
- Tiredness or mood changes
- Muscle weakness
- Erection problems or difficulty conceiving
- In women: irregular periods or fertility concerns
How to give your sample
The app shows which ways are open for this test before you pay.
A kit at home
A finger-prick kit by post, with the return postage paid. The app walks you through it.
A collection point
A blood sample taken at a collection point near you, found from your postcode in the app.
Someone comes to you
A professional takes the sample at your home or office, on the day you choose.
The result arrives in the app.
It is yours: keep it, or send it to the doctor of your choice: only a doctor can say what it means for you. This page explains what the test is for; it does not replace a consultation.
Create your account