
All testosterone, bound + free
- Blood
- 3–5 days
- Home pickup
Not currently available for booking
Men's hormone tests compared
Total testosterone is the standard first test. Free testosterone matters in specific situations. Here's the difference.
The bottom line
For a first check of low-testosterone symptoms — low energy, low libido, mood changes — total testosterone is the recommended starting test, ideally on a morning sample. Free testosterone becomes useful when total is borderline, or in conditions that change the proteins that bind testosterone (obesity, diabetes, thyroid or liver issues, older age). Start with total; add free if your doctor finds a borderline or confusing result.
It's your first check for low-T symptoms.
See price & bookPick Free TestosteroneTotal is borderline, or you have obesity/diabetes/thyroid issues.
See price & bookMost testosterone in the blood is bound to proteins; only a small fraction is 'free' and biologically active. Total testosterone measures everything together and is the recommended first-line test — it's well standardised and usually answers the question.
Free testosterone matters when the binding proteins are altered — by obesity, diabetes, thyroid or liver conditions, or age — because in those cases the total can look normal while the active fraction is low. A morning sample is important for both, as levels are highest early in the day.
Swipe across to compare all tests.
| Feature | Total Testosterone Recommended first test | Free Testosterone The active fraction |
|---|---|---|
| Recommended first test | Yes | Add-on |
| Better when binding proteins altered | Can mislead | Yes |
| Morning sample important | Yes | Yes |
| Typical price band | Mid | Mid-high |

All testosterone, bound + free
Not currently available for booking
Heads up: Can read normal when binding proteins are altered

The unbound, biologically active testosterone
Not currently available for booking
Heads up: Assay methods vary — interpret with a doctor
Or get everything in one panel
116 parameters. Review preparation and collection options.
Home collection
A phlebotomist visits at your chosen time.
Laboratory testing
Samples are processed by partner laboratories.
Reports to your dashboard
Digital reports, usually within hours.
A registered doctor reviews your symptoms and history, tells you exactly which test you need, and interprets the results with you.
This page is general information to help you choose a test, not a diagnosis or medical advice. Lab results should be interpreted by a doctor alongside your symptoms and history.