Sex Hormone Binding Globulin (SHBG)

The protein that carries testosterone and oestradiol around the blood. It changes how a total testosterone result should be read, which is why it is rarely useful alone.

Sex Hormone Binding Globulin in the Biomarker Guide — what it is, why it is tested, and what moves the number.

Add-on markers can only be added to venous samples.

Timing

Take between 7am and 10am, alongside the hormones it is used to interpret.

Turnaround: the lab reports this test within 24 hours of receiving your sample, counted in working days. Most samples reach them within about 3 days of posting. Full detail on our Turnaround Times page.

We do not interpret results. Not medical advice or a diagnosis.