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Enhanced Testosterone Blood Test

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Comprehensive blood test taken by a healthcare professional.

A comprehensive venous blood test which is needed to confirm the initial blood test result and assess your health so that you can safely start testosterone replacement therapy.
Choose your collection method:
Test kit with clinic appointmentSample taken at walk in clinic
Test kit with at-home nurse visitSample taken by a qualified nurse
Test kit onlyOrganise your own sample collection

This test is only suitable when you have eligible results from ourInitial Testosterone Blood Test

What this test measures
43 biomarkers analysed
Total Testosterone
This is the total amount of testosterone found in the blood. Some of it is attached to proteins, such as Sex-Hormone Binding Globulin (SHBG) or Albumin, which transport it around your body.
Free Testosterone
Free testosterone is the testosterone that is unbound and available to be used by the body’s cells.

When a cell binds to free testosterone its functionality is enabled. The more you have of it, the better.
Sex-Hormone Binding Globulin (SHBG)
This protein is produced in the liver and regulates hormone levels by binding to sex hormones, including testosterone.

When your SHBG levels are high, your body has less free testosterone available to be used by the body’s cells.
Another protein produced in the liver which binds to testosterone, inhibiting its ability to be used by the body’s cells.
Oestradiol (Oestrogen)
Although oestrogen is considered to be a predominantly female hormone, it’s also present in men and plays an important role in regulating their libidos, erectile function, and the production of sperm.

A delicate balance of oestrogen and testosterone ensures optimal sexual function, as well as joint and brain health.
Prolactin is another hormone produced by the pituitary gland.

We monitor this as high levels may indicate issues that need treatment before TRT can commence.
TSH and Free T4
These are hormones produced in the thyroid gland. We measure their levels to check for thyroid issues.
Luteinising Hormone (LH) and Follicle Stimulating Hormone (FSH)
LH and FSH are hormones (or gonadotropins) produced in the pituitary gland. They control testosterone production in the testicles.

Low or high levels of these hormones can indicate that there’s an issue with the pituitary gland or testicles.
Liver and kidney function
Liver and kidney function is reviewed before starting TRT to ensure that there are no other conditions present.
Full blood count
The full blood count shows general health markers and indicates if your red blood cell count is too high.

Testosterone can increase the number of red blood cells the body produces, so monitoring this while you’re on TRT is important.
Cholesterol and lipids
Cholesterol and other lipids are evaluated before and during TRT to ensure that the patient is healthy and not at risk of cardiovascular issues.
Cortisol is reviewed before TRT to check other hormonal systems are functioning properly.
Ferritin is an indicator of a condition that may cause low testosterone.
FHbA1c is a marker used to check for diabetes and poor glycaemic control.
PSA is prostate specific antigen and is used to check for prostate issues.
How it works
Order your test
The enhanced blood test kit has everything a healthcare professional will need to take your blood sample. We'll help you organise your appointment.
Collect your sample
Have a healthcare professional at one of our partner clinics or a visit from a nurse collect your blood sample, then post it to the lab for free.
Review your results
Access your results on your online portal. Our experts will review your results to give you advice and next steps.
Why check your testosterone levels with us?
Insights that matter
Access meaningful easy-to-understand insights into your testosterone levels and overall health any time from your secure online account.
Personalised advice
Our team of TRT specialists provide ongoing advice and treatment by factoring in your unique lifestyle, lab results, symptoms, and medical history.
Track your testosterone levels
Continuous monitoring of your testosterone health with quick, easy repeat testing lets us fine-tune your treatment to optimise your results.
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Excellent service. Results received 48 hours from sending them back. 👍👍
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Meet our team of experts
We have the UK's leading doctors and experts in testosterone replacement therapy. Meet our team.
Chris Airey
TRT Medical Expert
Alastair Kennett
TRT Expert
Rana Mirzai
Clinician, TRT
Enhanced blood test, everything you need to know
Curated by Dr. Chris Airey, TRT Medical Expert
How does a walk-in clinic work?
After ordering the test, you will receive an email with instructions on how to book your clinic visit.

The test kit will be delivered to your home within a few days. Take your kit to the appointment, then post the sample back to us using the Tracked-24 envelope.
How does a nurse visit work?
After ordering the test, a qualified nurse will contact you to schedule a visit to your home or office to collect your blood sample at the scheduled time and date.

Post the sample back to us using the Tracked-24 envelope.
Can I organise a collection myself?
Yes. This option is for people who want to make their own appointment at a phlebotomy clinic to have their blood sample taken from a vein in their arm (venous draw).

You’ll be responsible for any additional fees incurred.

We'll send you everything you need for the healthcare staff or clinic to collect your sample and for you to return it.
Will I be able to talk to a licensed doctor?
Yes, you’ll have a consultation with one of our doctors to discuss your test results and they can provide a personalised treatment plan tailored to your needs. Our doctors specialise in TRT for men and are all registered with the General Medical Council.
How do these blood tests lead to treatment?
Our initial blood test will establish whether you have a testosterone deficiency. If the first test shows that you have low testosterone you’ll need to take our second, more comprehensive blood test if you’d like to start TRT - this is due to UK regulations. If both tests show that you have low T levels, you’ll discuss suitable treatment options with one of our doctors and during an in-depth consultation before starting treatment.
How soon will the test arrive?
Our blood test kits usually arrive within three working days. It may take longer over public holidays.
When will I get my results?
We’ll get in touch to give you your results within two to three business days. One of our TRT specialists will then walk you through the results, provide advice, and answer all of your questions.
Other blood tests
Initial Testosterone Blood Test
From £65
A simple to use at-home blood test to measure your total and free testosterone to assess your eligible for treatment.
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