Bioavailable Testosterone

Bioavailable Testosterone

Category
Men's Health
Sample
Blood sample taken from a vein in your arm
Reports () Terms & Conditions Report time varies with time of sample collection.
In 2 days
Fasting
No Fasting

What Is This Test?

Measures bioavailable testosterone — the free fraction plus the portion loosely bound to albumin, which tissues can use.

Why this test is performed?

Gives a better estimate of active testosterone in older men and people with abnormal SHBG levels.

Who should take this test?

Low energy or libido, erectile problems, infertility, prostate/urinary symptoms, men over 50.

Test Preparation

No fasting is needed. Give the sample in the morning (ideally before 10 AM), as testosterone is highest early in the day.

What's included 4 parameters

  • Testosterone Total
  • Bioavailable Testosterone
  • Sex Hormone Binding Globulin (SHBG)
  • Albumin
Medical disclaimer · for information only, not medical advice

This article is for general information and education only. It is not medical advice, does not create a doctor–patient relationship, and is not a substitute for consultation with a qualified doctor who has assessed your individual situation. Never delay seeking medical advice because of something you have read here.

In a medical emergency, call 112, or 108 for an ambulance where that service operates, or go to your nearest emergency department. If you are in mental health distress, Tele-MANAS is free and available 24×7 on 14416.

Read our Editorial Policy and Medical Review Process.

Frequently asked questions

It includes free testosterone and the loosely bound portion, so it is slightly higher and reflects usable hormone.

No fasting is needed. Give the sample in the morning (ideally before 10 AM), as testosterone is highest early in the day.

Blood sample taken from a vein in your arm.

Usually about 13–37 hours after the sample reaches the lab. You will receive the report online.

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