Testosterone, Free, Serum
How to prepare
You can eat and drink normally before the test.
No special preparation needed.
Tell our phlebotomist about any medicines you take. Don't stop them without asking your doctor.
Wear a loose sleeve so the sample can be taken easily from your arm.
How it works
About this test
Free testosterone is the active part of testosterone that is not bound to proteins. It gives a more accurate picture when total testosterone is borderline or SHBG is abnormal.
Why is this test done?
- Investigate low testosterone in men
- Investigate PCOS or excess hair in women
Symptoms — when should you get tested?
- Low energy and libido
- Erection problems
- Excess hair or acne in women
- Irregular periods
Normal range
Reference ranges differ slightly between labs, methods, age and sex. Always discuss your report with your doctor.
If your result is high
High free testosterone in women suggests excess male hormones.
Common reasons- PCOS
- Adrenal disorders
- Steroid use
If your result is low
Low free testosterone in men can cause tiredness, low libido and muscle loss.
Common reasons- Ageing
- Obesity and diabetes
- Testicular or pituitary problems
How is the test done?
- 1Book online
Choose your slot for home collection or a visit to our centre.
- 2Blood sample taken
A trained phlebotomist takes a small blood sample from a vein in your arm with a sealed, single-use needle. It takes about 2 minutes.
- 3Tested in our lab
Your barcoded sample is tested on automated machines with strict quality checks.
- 4Report on WhatsApp
A pathologist checks the result and the report reaches you on WhatsApp and email.
Frequently asked questions
No fasting is needed for this test. You can eat and drink normally.
Your report is usually ready in same day after the sample reaches our lab. We send it on WhatsApp and email, and you can also download it from the Reports page.
Please call our team to confirm whether home sample collection is available for your location and test.
This test needs a blood sample. No special preparation needed.