TRT Monitoring Blood Test

16 Biomarkers | Venous Blood Test | CE-marked | UKAS-accredited | Doctor-reviewed results with personalised interpretation.

A TRT monitoring profile checking testosterone-related markers, full blood count, liver function, oestradiol, prolactin and PSA. Designed for men using, considering or reviewing testosterone replacement therapy, this test gives clear, clinically reviewed insight so you can understand your results and know what to do next.

Results are typically available within 2 working days from when your sample reaches the laboratory (excluding weekends and bank holidays).

£109.00

Taxes included. Shipping calculated at checkout.

Choose your sample collection method: Book a venous draw at our Livingston clinic Book a venous draw at home with a nurse +£63 Self-arrange a professional sample collection Partner clinic visit + £35.00

PSA Test

Oestradiol
Prolactin

Alanine Transferase
Albumin
Alkaline Phosphatase
Aspartate Transferase
Bilirubin
Gamma GT
Globulin
Total Protein

Basophil Count
Eosinophil Count
Haematocrit
Haemoglobin
Lymphocyte Count
MCH
MCHC
MCV
Monocyte Count
Neutrophil Count
Platelet Count
RBC
WBC

DHEA Sulphate
Free Testosterone Calculation
Sex Hormone Binding Globulin
Testosterone

Fasting required 8–12 h before the test (water only) recommended for glucose, cholesterol/triglyceride accuracy
Sample timing: between 7:00 AM – 10:00 AM
Stay hydrated; avoid strenuous exercise, heavy meals, and supplements (iron, B12, multivitamins, biotin) for 48 hours prior
Continue prescribed medications unless otherwise directed

Frequently asked questions

It is for men already receiving testosterone replacement therapy who need regular monitoring. It tracks testosterone alongside haematocrit, oestradiol, PSA, and liver and lipid markers, which are the parameters that require ongoing surveillance during treatment.

For injections, the standard approach is a trough sample taken immediately before your next dose, as this shows the lowest level your body reaches. For gels, test three to four hours after application. Consistency matters most, so use the same timing each time you retest and record it.

Testosterone therapy can raise red blood cell concentration, which thickens the blood and increases cardiovascular risk if left unchecked. Haematocrit is the standard safety marker for this, and it is a routine part of responsible TRT monitoring rather than an optional extra.

Testosterone converts to oestradiol in the body, and on TRT that conversion can increase. Levels that are too high or too low both cause symptoms, including mood changes, water retention and reduced libido, so it is monitored to keep the balance right.

Fast for 10 to 12 hours where lipids are included. Monitoring intervals are set by your prescribing clinician, but testing is commonly done at three to six months after any dose change and then periodically once stable. Always follow your prescriber's schedule.