Private testosterone blood test,
Harley Street, London.

Our Testosterone Panel measures total testosterone, free testosterone, SHBG, LH, FSH and DHT, so a low result can be read against the pituitary signals that help classify its cause. Oestradiol and prolactin are not included as standard: where a clinician recommends them, they can be added as a custom panel, with the price confirmed in writing before booking. Every sample is drawn at 134 Harley Street and interpreted by a GMC-registered doctor against BSSM guidance.

Yes. A testosterone test is a blood test: testosterone is measured from a venous blood sample, ideally drawn in the morning. The terms testosterone test, testosterone blood test and testosterone level test all describe the same thing. At WMG Health it is drawn at 134 Harley Street, London and interpreted by a GMC-registered doctor.

Testosterone follows a daily rhythm, peaking in the early morning and falling through the day, so a sample drawn in the afternoon can read misleadingly low even in a healthy man. BSSM guidance is a fasting morning sample drawn between 7 and 11 AM. Food, and glucose in particular, transiently lowers testosterone, which is why the draw is done fasting with water only.

Total testosterone measures all the testosterone in your blood, most of which is bound to SHBG and albumin and not available to your tissues. Free testosterone is the small unbound fraction that is biologically active. When total testosterone sits in the grey zone (8 to 12 nmol/L), free testosterone is what clarifies whether you are genuinely deficient, which is why the Testosterone Panel measures both, alongside SHBG.

BSSM regards a fasting morning total testosterone above 12 nmol/L as generally normal and below 8 nmol/L as supporting a diagnosis of testosterone deficiency. Between 8 and 12 nmol/L is a grey zone where free testosterone (deficiency supported below approximately 0.225 nmol/L) and your symptoms guide interpretation. A number in isolation does not make a diagnosis: it is read alongside your symptoms and the SHBG, LH and FSH results on the same panel.

For a new diagnosis of testosterone deficiency, yes. BSSM recommends confirming a low result with a second fasting morning sample drawn on a separate day before deficiency is diagnosed, because testosterone varies day to day and a single low reading can be transient (acute illness, poor sleep and stress all lower it). If you are already on treatment and testing for monitoring, a single timed sample is usually sufficient.

Men on testosterone replacement are typically monitored with total testosterone (timed to your regimen, for example trough level before the next injection), haematocrit and full blood count (testosterone raises red cell mass, and a rising haematocrit is the commonest reason to adjust a dose), plus PSA where age-appropriate and oestradiol if symptoms suggest it. We tailor the monitoring panel to your preparation and how long you have been on it.

Yes. In women, testosterone is measured mainly to investigate androgen excess: unwanted hair growth, scalp hair thinning, acne or suspected PCOS, where a raised DHEAS points to an adrenal source and raised testosterone to an ovarian or mixed picture. It is also relevant to low libido assessment. The interpretation and reference ranges differ entirely from men, which is why results are always read by a clinician rather than against a lab range alone.

Our focused Testosterone Panel (total testosterone, free testosterone, SHBG, LH, FSH and DHT) is £199, including the appointment and a written review by a GMC-registered doctor. If a clinician recommends adding markers such as oestradiol or prolactin, that becomes a custom panel, and we confirm the exact price in writing before booking.

Results are released as each marker is reviewed, rather than held back until the whole panel is complete. The androgen markers are the slower ones on this panel, so they set the completion date, and we confirm the expected timeframe for your panel at booking.