If you suspect you have low testosterone and you’re trying to work out how to actually get treated in the UK, you’re not alone. Thousands of men across the country experience symptoms of testosterone deficiency — fatigue, low mood, reduced libido, poor concentration, loss of muscle — but navigating the healthcare system to get a diagnosis and treatment can feel frustratingly complicated.
The good news is that testosterone replacement therapy (TRT) is a well-established, evidence-based treatment that is available both through the NHS and via regulated private clinics. The not-so-good news is that the pathway isn’t always straightforward, and the experience varies enormously depending on where you live, which GP you see, and whether you choose the public or private route.
This guide walks you through every step of the process — from recognising symptoms to getting your first prescription — so you know exactly what to expect and can make an informed decision about the best route for you.
Step 1: Recognise the Symptoms
Before seeking treatment, it helps to understand what low testosterone actually looks and feels like. The symptoms are broad and often overlap with other conditions, which is one reason why testosterone deficiency is frequently missed or misdiagnosed.
Common symptoms of low testosterone include:
- Persistent fatigue — not just tiredness after a bad night, but a deep, unrelenting lack of energy that doesn’t improve with rest
- Reduced libido — a noticeable decline in sexual desire, not just a temporary dip
- Erectile dysfunction — difficulty achieving or maintaining erections
- Low mood or irritability — depression-like symptoms, brain fog, or emotional flatness
- Loss of muscle mass and strength — even when you’re training and eating well
- Increased body fat — particularly around the abdomen
- Poor sleep quality — difficulty falling or staying asleep
- Reduced motivation and drive — a general sense of apathy
If several of these sound familiar, it’s worth investigating further. You can take our free online ADAM questionnaire to screen for potential testosterone deficiency — it takes less than two minutes and gives you an immediate indication of whether your symptoms warrant testing.
Step 2: Get Your Blood Tested
Symptoms alone aren’t enough to diagnose low testosterone. You need a blood test to confirm it. This is non-negotiable — no reputable clinician will prescribe TRT based on symptoms alone.
What blood tests are needed?
At minimum, you need:
| Test | What It Measures | Why It Matters |
|---|---|---|
| Total Testosterone | Overall testosterone in your blood | The primary diagnostic marker |
| Free Testosterone | The unbound, biologically active portion | Can be low even when total is “normal” |
| SHBG (Sex Hormone-Binding Globulin) | The protein that binds testosterone | High SHBG can mask true deficiency |
| LH (Luteinising Hormone) | Pituitary signal to the testes | Helps determine the cause of low T |
| FSH (Follicle-Stimulating Hormone) | Another pituitary hormone | Helps differentiate primary vs secondary hypogonadism |
| Prolactin | Pituitary hormone | Elevated levels can suppress testosterone |
| Full Blood Count (FBC) | Red blood cells, haematocrit, etc. | Baseline before starting TRT |
| PSA (Prostate-Specific Antigen) | Prostate health marker | Screening before TRT, especially in men over 40 |
A comprehensive panel will also typically include thyroid function, liver function, HbA1c (diabetes marker), lipid profile, and oestradiol. These help rule out other causes of your symptoms and establish a full baseline.
Timing matters
Testosterone follows a circadian rhythm, peaking in the early morning and declining throughout the day. Blood samples should ideally be taken before 10am, fasting if possible. A single low reading is not sufficient for diagnosis — NICE guidelines and the British Society for Sexual Medicine (BSSM) recommend at least two separate morning readings to confirm deficiency.
If you’d like to start with a comprehensive testosterone blood test, our at-home testosterone test kit covers all the key markers and can be completed from the comfort of your home.
Step 3: Understand the Diagnostic Criteria
In the UK, the diagnosis of testosterone deficiency (hypogonadism) requires both of the following:
- Consistently low testosterone levels on at least two morning blood tests
- Clinical symptoms consistent with testosterone deficiency
There is no single universally agreed threshold for “low,” which is where things get complicated. Most UK laboratories use a reference range of approximately 8.0 to 27.0 nmol/L for total testosterone. The BSSM guidelines suggest:
- Below 8 nmol/L: Almost certainly deficient — treatment usually recommended
- 8 to 12 nmol/L: A grey zone — symptoms and free testosterone should guide the decision
- Above 12 nmol/L: Less likely to be the cause of symptoms, though free testosterone may still be low
NICE Clinical Knowledge Summaries align broadly with this approach, emphasising that the diagnosis should never be based on a number alone. Symptoms, clinical context, and the patient’s overall health all matter.
Step 4: Choose Your Pathway — NHS or Private
This is where the experience diverges significantly depending on which route you take.
The NHS Pathway
Step 1: See your GP. Book an appointment and explain your symptoms clearly. Ask specifically for a testosterone blood test. Some GPs are well-informed about testosterone deficiency; others may dismiss your concerns or attribute symptoms to stress, depression, or ageing. If your GP is reluctant to test, you are entitled to request it — particularly if your symptoms are consistent with hypogonadism.
Step 2: Get tested. Your GP will order blood tests through the NHS laboratory. Results typically take 1-2 weeks. If the first result is low, a repeat test should be arranged.
Step 3: Referral to endocrinology. If your results confirm low testosterone, your GP may either initiate treatment themselves (some do, though many prefer not to) or refer you to an endocrinologist. This is where delays often occur.
Step 4: Wait. NHS endocrinology waiting times vary enormously by region but are commonly 3 to 12 months, and in some areas significantly longer. During the COVID recovery period, these waits stretched further. You’ll likely need additional blood work and possibly an MRI of the pituitary gland (to rule out structural causes) before treatment is started.
Step 5: Start treatment. Once diagnosed, you’ll be prescribed TRT — most commonly Sustanon 250 injections (every 2-4 weeks) or Testogel (daily gel). Nebido (long-acting injection every 10-12 weeks) may also be available but is more commonly initiated by specialists.
Pros of the NHS route:
- Free at the point of use (standard prescription charges apply)
- Specialist endocrinology oversight
- Integrated with your wider NHS medical record
Cons of the NHS route:
- Long waiting times for specialist referral
- Limited choice of TRT formulation
- Variable GP knowledge and willingness to prescribe
- Less frequent monitoring and follow-up appointments
- Some men report feeling dismissed or not taken seriously
The Private Clinic Pathway
Private clinics have become increasingly popular for TRT in the UK, largely because they offer faster access, more comprehensive monitoring, and a wider choice of treatment options. Here’s how the process typically works:
Step 1: Book a consultation or blood test. Most reputable private clinics offer an initial consultation (often remote, via video call) and comprehensive blood testing. Some clinics provide at-home blood test kits; others use partner laboratories.
Step 2: Receive your results. Turnaround is typically 3 to 7 days, compared to weeks on the NHS. Results are reviewed by a specialist clinician.
Step 3: Clinical review and diagnosis. A doctor will review your blood results alongside your symptoms and medical history. If you meet the diagnostic criteria, a treatment plan is recommended.
Step 4: Start treatment. Prescriptions are issued quickly, and medication is usually delivered directly to your door. The full process from initial consultation to starting treatment can take as little as 1 to 2 weeks.
Step 5: Ongoing monitoring. Reputable clinics schedule regular blood tests (typically at 6-8 weeks, then every 3-6 months) to ensure your levels are optimal and to monitor for side effects.
Cost Comparison: NHS vs Private
| Item | NHS | Private Clinic |
|---|---|---|
| Initial blood tests | Free | £80-£200 |
| Consultation | Free (but long wait) | £50-£150 |
| Waiting time to start treatment | 3-12+ months | 1-2 weeks |
| Monthly medication cost | £9.90 per prescription item | £30-£80/month depending on formulation |
| Ongoing monitoring blood tests | Free (but infrequent) | £60-£150 per panel |
| Follow-up consultations | Free (limited availability) | Often included in monthly subscription |
The NHS is undeniably cheaper, but the trade-off is time, flexibility, and level of personalised care. Many men find the private route offers better value when they factor in the months of waiting, limited monitoring, and less proactive management that the NHS often provides.
Step 5: Choose a Reputable Provider
If you decide to go private, choosing the right clinic is critical. The TRT market in the UK has grown rapidly, and not all providers operate to the same standard. Here’s what to look for:
Regulatory registration
Any clinic prescribing medication in the UK should be registered with the appropriate regulatory body:
- England: Care Quality Commission (CQC)
- Northern Ireland: Regulation and Quality Improvement Authority (RQIA)
- Scotland: Healthcare Improvement Scotland (HIS)
- Wales: Healthcare Inspectorate Wales (HIW)
If a clinic cannot demonstrate regulatory registration, that is a significant red flag. Regulated clinics are subject to inspections, standards of care, and accountability mechanisms that protect patients.
Qualified prescribers
TRT should be prescribed by a doctor registered with the General Medical Council (GMC). Some clinics use nurse prescribers or pharmacist independent prescribers, which is lawful but you should ensure they are operating under appropriate clinical governance with medical oversight.
Comprehensive blood testing
Any clinic that prescribes TRT without comprehensive blood work first is not operating responsibly. A proper baseline panel should include all the markers listed in the table above, at minimum. If a clinic offers to prescribe based on a questionnaire alone, walk away.
Ongoing monitoring
TRT is not a “set and forget” treatment. Responsible clinics schedule regular follow-up blood tests and consultations to monitor your response, adjust dosing, and screen for side effects such as elevated haematocrit or changes in PSA.
Red flags to watch for
- Guaranteed TRT before you’ve even had bloods taken
- No regulatory registration displayed
- Prescribing testosterone to men with normal levels for “optimisation”
- No mention of monitoring or follow-up
- Pressure tactics or hard selling
- Unusually cheap prices (often means cut corners on monitoring)
How Evernu’s TRT Process Works
At Evernu, we’ve designed our process to be thorough, transparent, and efficient. Here’s what it looks like step by step:
- Complete our online ADAM screening questionnaire — This takes under two minutes and helps you understand whether your symptoms are consistent with low testosterone. Start the questionnaire here.
- Order a comprehensive blood test — Our at-home blood test kit covers total testosterone, free testosterone, SHBG, LH, FSH, oestradiol, prolactin, full blood count, PSA, thyroid function, and metabolic markers. Take your sample at home first thing in the morning and post it back in the prepaid envelope.
- Clinician review — Your results are reviewed by one of our GMC-registered doctors, who will assess your blood work alongside your symptoms and medical history.
- Video consultation — If your results suggest testosterone deficiency, you’ll have a video consultation with your clinician to discuss diagnosis, treatment options, and any questions you may have.
- Treatment plan and prescription — If TRT is appropriate, a personalised treatment plan is created and your medication is delivered to your door.
- Ongoing monitoring — We schedule follow-up blood tests at 6-8 weeks after starting treatment, then every 3-6 months. Your clinician reviews every result and adjusts your protocol as needed.
Evernu is regulated by the Regulation and Quality Improvement Authority (RQIA), ensuring we meet the highest standards of clinical governance and patient safety. You can learn more about our testosterone treatment service on our TRT treatment page.
What About Online Testosterone from Abroad?
We need to address the elephant in the room: buying testosterone online without a prescription. It’s illegal in the UK to supply prescription-only medicines without a valid prescription, and importing testosterone from overseas pharmacies or underground labs carries serious risks:
- Unknown purity and dosage — Products may be contaminated, underdosed, or overdosed
- No medical monitoring — Without blood tests, you won’t know if your haematocrit is dangerously high or if there are other problems developing
- Legal risk — While personal possession of testosterone is not a criminal offence in the UK (it is not a Class A, B, or C drug), supply and importation for supply is illegal
- No accountability — If something goes wrong, you have no recourse
The MHRA (Medicines and Healthcare products Regulatory Agency) regularly issues warnings about unlicensed testosterone products and the risks of purchasing prescription medicines without proper medical supervision. It is simply not worth the risk when legitimate, regulated treatment is readily available.
Frequently Asked Questions
Can my GP prescribe TRT directly?
Yes, GPs can prescribe TRT without referring you to an endocrinologist. However, many prefer to refer because they lack confidence or experience with testosterone prescribing. If your GP is knowledgeable and willing, they can manage your treatment in primary care. The BSSM has published guidelines specifically to support GPs in diagnosing and managing testosterone deficiency.
Is TRT a lifelong commitment?
In most cases, yes. If your testosterone deficiency is caused by a permanent condition (primary or secondary hypogonadism), stopping TRT will cause your levels and symptoms to return. However, in some cases — particularly where lifestyle factors like obesity are contributing — addressing those factors may improve natural testosterone production enough to reduce or stop TRT. This should always be done under medical supervision.
Will TRT affect my fertility?
Yes, TRT suppresses sperm production and can significantly reduce fertility. If you’re planning to have children, this must be discussed with your clinician before starting treatment. There are strategies to mitigate this (such as using hCG alongside testosterone), and fertility typically recovers after stopping TRT, though the timeline varies.
How quickly will I feel better?
Some improvements (energy, mood) may be noticeable within 2-4 weeks. Others (body composition, full symptom resolution) take 3-6 months or longer. For a detailed breakdown, see our article on how long TRT takes to work.
What Should You Do Next?
If you’re experiencing symptoms consistent with low testosterone, the most important step is getting properly tested. Don’t suffer in silence, and don’t self-diagnose or self-treat.
Your options are:
- See your GP — Request a morning testosterone blood test. Be clear about your symptoms and ask for a referral to endocrinology if your results are low.
- Take our free screening questionnaire — Our ADAM questionnaire helps you assess whether your symptoms warrant testing.
- Order a comprehensive blood test — Our at-home testosterone test gives you a full picture of your hormonal health with fast results.
- Explore our TRT service — Visit our testosterone treatment page to learn about how we diagnose, treat, and monitor testosterone deficiency.
Getting the right diagnosis is the first step. Everything else follows from there.
