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 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.

These are hormones produced in the thyroid gland. We measure their levels to check for thyroid issues.

PSA is prostate specific antigen and is used to check for prostate issues.

Liver and kidney function

Liver and kidney function is reviewed before starting TRT to ensure that there are no other conditions present.

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.

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.

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.

How does a walk-in clinic work?

Please attend your clinic appointment on the date and time that you book for to get your sample taken by a nurse. After this, please post the sample back to us using the Tracked-24 envelope.

How does a home visit work?

You will get a message within 24 hrs of your home visit with a more specific time for your appointment. A nurse will then visit your home, take your sample and then you’ll need to please 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.

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.

Enhanced Testosterone Blood Test

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Enhanced Testosterone Blood Test

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10,831 reviews

Confirm your initial diagnosis for low testosterone

This comprehensive venous blood test is needed to confirm your testosterone levels and to assess your suitability for testosterone replacement therapy (TRT).

Choose between a walk-in clinic visit, an at-home visit, or a test kit only (if you know someone qualified to take your sample).

If you're under 40, please book your test before 12pm. If you’re 40 or over, please book your test for before 2pm. This is to ensure an accurate reading of your testosterone levels.

What’s tested

Learn more

39 BIOMARKERS ANALYSED

We check your testosterone levels, liver health, kidney function, and indicators of your heart health, such as haematocrit, which help our doctors decide the right treatment options to solve low testosterone.

See why our customers choose us

Convenient testing options

UKAS-certified laboratories

Track your results online

From £79.95

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

Cancel any time plans

Who is this test for?

This test is for those with an initial low testosterone diagnosis who are considering TRT treatment.

Confirms your initial low-T diagnosis

Assess your health in order to start TRT

Required by BSSM guidelines

Don't have a low testosterone diagnosis? Buy an Initial Testosterone Blood Test.

What does the test measure?

FUNDAMENTALS

How testing works

Book your test

Book your venous blood test today.

Choose between a clinic visit, home visit, or test kit only (if you know someone qualified to take your sample). If you're under 40, please book the test for before 12pm, when testosterone levels are typically highest.

Collect your sample

Attend your appointment so that the healthcare professional can collect your blood sample, then post it to the lab for free.

Review your results

Access invaluable health data online in just a few days. Our experts will review your results and give you clear actionable advice.

90%

of patients saw an improvement in their symptoms after 3 months of treatment

About low testosterone

The physical and mental symptoms of low testosterone can really take their toll, but it doesn’t have to be this way.

Low sex drive

Low mood or motivation

Erectile dysfunction

Depression & irritability

Difficulty losing weight

Reduced muscle mass

GETTING TREATMENT

How to start TRT treatment

Take the initial blood test

Our initial at-home, finger-prick blood test measures 4 biomarkers including your total and free testosterone levels. You can access your results via your VOY account.

Take an enhanced blood test

A comprehensive venous blood test is needed to confirm the initial result, learn more about your health, and assess whether it’s safe to start treatment.

Speak to a doctor

Discuss your blood test results, symptoms, medical history, treatment options (including costs), and what to expect when you start treatment with an expert TRT doctor.

Start your treatment

Your doctor will design a personalised treatment plan that works specifically for you and your lifestyle. It may include medication, lifestyle advice or supplements.

TESTIMONIALS

Voy is transforming lives

145

increase in Free Testosterone

"The whole journey has been life changing. I feel better within myself, and I know that people around me are starting to benefit from that — it’s been a big game changer."

Decreased weight

Brain fog lifted

Stephen

216

increase in Free Testosterone

"I have more life about me, I feel younger, I feel happier, I feel better — it’s now enabled me to focus on different spheres of my life."

Improved sleep

Increased motivation

James

145

increase in Free Testosterone

"Since being on TRT my boss has seen such a difference in me — my energy levels are where they should be, and I’m back to being me, it’s fantastic."

Increased energy

Improved mood

Andy

FAQ

Testosterone replacement therapy service, everything you need to know

Dr. Jeff Foster, Director of Men's Health

TESTIMONIALS

Thousands of patients have seen life-changing results

Great service, very personal with a strong emphasis on improving quality of life - cannot recommend more highly!

Keith

Not experienced service so quick and efficient since I can remember. Ursula and Dr Taylor are knowledgeable, professional and positive in helping you to help yourself. Medication en route so I look forward to starting TRT and hopefully this will help me feel better soon!

Matt Leman

Had all relevant info to hand. Understood and answered my concerns. Very pleased with way call went

Steve Tuckey

10/10 top tier service , Rachel and Ursula have both been very helpful so far and all the nurses and doctors have been doing a great job , and have been giving me a vast amount of knowledge on the treatment and how everything works

Abass

The staff are great from the DR to the people replying to emails. I’ve had quick effective service throughout. I recommend them to anyone.

Liam

Excellent service and understanding on all aspects of TRT,

Andrew

I’ve been dealing with Tom for over a month whilst I have been looking into starting TRT. Tom has been a extremely helpful and patient with me as I asked him alot of questions and he very professional.

Callum

Amazing experience so far. Treatment has changed my life and I’ve been supported all the way.

Terry Chamberlain

The service provided has been excellent. Particular credit to Ursula who has been very helpful. The Medical team have been great, both professional and friendly.

Paul Bishop

These people understand your needs , will improve your situation and supply a great product.

Roger Davis

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