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Two routes to testosterone therapy in the UK. One is free and takes 18 months to access. The other costs money and can start within weeks. Here is how both actually work.
The NHS route
Who qualifies: The NHS prescribes TRT for hypogonadism, typically defined as total testosterone consistently below 8 nmol/L (some endocrinologists use 12 nmol/L) with clinical symptoms. Men in the low-normal range (8 to 15 nmol/L) with symptoms generally do not meet NHS criteria.
How to access it: Start with your GP. Request a testosterone blood test. If results are low, ask for an endocrinology referral. The referral-to-appointment wait is currently 12 to 18 months in most NHS regions.
What you get: Testosterone replacement via gel (Testogel, Tostran), injection (Sustanon 250, testosterone enanthate), or oral tablet (Reandron). Blood monitoring every 6 to 12 months once stable. Your GP manages ongoing prescribing after the initial endocrinology consultation.
The frustrations:
- The NHS normal range (8 to 29 nmol/L) means many symptomatic men are turned away at the GP stage
- Treatment options are conservative, NHS clinicians rarely prescribe above mid-normal testosterone targets
- Monitoring frequency is lower than specialist private clinics
- HCG (for fertility preservation or testicular function maintenance) is rarely available on NHS
- Waiting times make this impractical if symptoms are significantly affecting quality of life
The private route
Private TRT clinics fill the gap that NHS prescribing criteria leave for men with low-normal testosterone (8 to 15 nmol/L) who are symptomatic.
Private clinicians generally use a broader assessment framework: symptoms plus bloodwork plus quality-of-life indicators, rather than a single cut-off number.
What private TRT actually involves
Step 1: Baseline blood tests. No legitimate private clinic prescribes without comprehensive baseline testing. The minimum: total testosterone, SHBG, free testosterone, LH, FSH, oestradiol, prolactin, full blood count, liver function, lipids, PSA (if over 40).
If you do not have recent comprehensive results, order a Medichecks Advanced Male Hormone panel before your consultation, it saves time and gives the clinic something to work with from the first appointment.
Step 2: Initial consultation. Online or in-person, 30 to 60 minutes. The doctor reviews your results, symptom history, and medical history. If treatment is appropriate, a first prescription is issued.
Step 3: First prescription. Most clinics start with testosterone enanthate injections (the gold standard for stable levels) or gel if you prefer. Some prescribe both and let you choose.
Step 4: Follow-up bloods at 6 to 8 weeks. Monitoring testosterone, haematocrit (red blood cell density, testosterone raises it), oestradiol, and PSA. Dose adjusted based on results and symptom response.
Step 5: Stable monitoring every 3 to 6 months. Once levels are optimised, monitoring frequency drops and monthly costs decrease.
The monitoring is what separates good private TRT from irresponsible prescribing. The clinics that will prescribe based on a basic total testosterone reading and then check in annually are the ones to avoid. The clinics that insist on a full baseline panel, test at 6 to 8 weeks, and adjust based on oestradiol and haematocrit alongside symptoms, that is evidence-based practice.
Grey market and self-prescribed TRT
There is a significant grey market for testosterone in the UK, imported from overseas pharmacies, gym contacts, or online suppliers. This carries serious risks:
Uncontrolled dosing leads to supraphysiological testosterone levels, high oestradiol, elevated haematocrit (stroke risk), and testicular atrophy without HCG coverage. Without monitoring, problems compound over months and years before being detected.
The cost difference between grey market and legitimate private TRT is smaller than most men assume once you factor in the required blood testing either way. For the price of certainty and a doctor's oversight, Pharmacy2U is not significantly more expensive than buying unregulated testosterone and having Medichecks panels periodically anyway.
The fertility question
Both NHS and private TRT suppress endogenous testosterone production. Exogenous testosterone signals the hypothalamus to reduce LH secretion, which stops testicular testosterone production and reduces spermatogenesis. If fertility is a concern, this matters.
HCG (human chorionic gonadotropin) mimics LH and maintains testicular function alongside TRT. Most good private clinics offer it. NHS access to HCG alongside TRT is limited and inconsistent.
If you may want children in the future, raise this in your initial consultation. It changes the protocol.
Making the decision
If your testosterone is below 8 nmol/L on two morning fasted tests, pursue the NHS route, you likely meet prescribing criteria and the free access is worth the wait. If your testosterone is in the 8 to 15 nmol/L range with significant symptoms, private TRT is the practical path. Do not use the grey market, the cost saving is not worth the risk of unmonitored supraphysiological dosing.
For a full comparison of private TRT clinics including costs, protocols, and what to expect in year one, see the best TRT clinics UK 2026 guide.
Before any TRT consultation, get a complete hormone panel. The home blood testing comparison covers all the options.
Further reading
- Best TRT clinics UK 2026, costs, protocols, and what to expect
- Home blood testing services UK, full comparison
- Medichecks review, the right panel to order before your TRT consultation
- When to get your testosterone tested UK
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