Testosterone (Total)

The total amount of testosterone in the blood, bound and unbound together. On its own it is a limited number — how much is actually available to your body depends on SHBG and albumin, which is why it is usually read alongside them rather than by itself.

Testosterone 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, fasted. Testosterone falls through the day, so a later sample reads lower.

The morning window matters and so does the fast. Glucose is the only marker we sell that is invalid unfasted, so if you cannot fast, keep the early slot and take it anyway.

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.