Testosterone Replacement Therapy (TRT) London 2026: Complete Guide

Medically reviewed by The Online GP by The Wellness clinical team | Last updated: April 2026

Private testosterone replacement therapy in London 2026 costs £100 to £375 per month depending on the clinic, formulation, and clinical care included. Around 20 percent of men over 50 may have symptomatic low testosterone according to research from the Centre for Men's Health, yet only 1 percent are diagnosed and treated. The growing private TRT market reflects both increased awareness and limited NHS access: NHS thresholds typically require total testosterone below 8 nmol/L with symptoms, leaving many symptomatic men in the 8 to 12 nmol/L range without NHS treatment options. At The Online GP by The Wellness in Marylebone, doctor-led TRT costs £225 to £295 per month inclusive of consultation, prescription, monitoring, and clinical support, with comprehensive baseline hormone testing at £445 and quarterly monitoring blood tests at £195.

This guide explains exactly what TRT is, who is a candidate, what diagnosis involves, what to expect from treatment, how the different testosterone formulations compare, and why proper specialist supervision matters more than the cheapest online subscription pricing.

Speak to a GMC-registered doctor today: WhatsApp +44 7961 280835 | Email team@thewellnesslondon.com | Call 020 3951 3429

What is testosterone replacement therapy?

Testosterone replacement therapy (TRT) is the medical treatment of confirmed testosterone deficiency syndrome (also called male hypogonadism, low testosterone, or low T) using pharmaceutically-manufactured testosterone identical to that produced naturally by the testes. Treatment restores serum testosterone to physiological levels, addressing both symptoms and the long-term health consequences of testosterone deficiency.

Testosterone deficiency syndrome is medically defined by two criteria together: clinical symptoms consistent with hypogonadism, AND biochemical evidence of low testosterone confirmed on appropriate blood testing. Either alone is insufficient: many men with normal testosterone have symptoms attributable to other causes, and some men with low blood testosterone have no symptoms requiring treatment.

The biology of testosterone in adult men is straightforward. The hypothalamus produces gonadotropin-releasing hormone (GnRH), which stimulates the pituitary gland to produce luteinising hormone (LH) and follicle-stimulating hormone (FSH). LH stimulates the Leydig cells of the testes to produce testosterone. FSH supports sperm production. Testosterone provides feedback to the hypothalamus and pituitary, regulating its own production through a homeostatic loop.

Testosterone affects multiple body systems, with receptors in muscle, bone, brain, cardiovascular system, skin, hair follicles, prostate, fat tissue, and erythropoietic (red blood cell-producing) cells. Functions include:

• Sexual function: libido, erectile function, ejaculatory function, reproductive capacity

• Muscle and bone: muscle protein synthesis, bone density, physical strength

• Metabolism: fat distribution, insulin sensitivity, basal metabolic rate

• Cognitive and emotional: motivation, drive, mood, focus, sense of wellbeing

• Cardiovascular: red blood cell production, vascular function

• Skin and hair: facial and body hair growth, sebum production, skin thickness

Testosterone declines naturally with age at approximately 1 to 2 percent per year from the 30s onwards. By age 70, average testosterone is approximately 60 to 70 percent of peak adult levels. Whether age-related testosterone decline is a "disease" warranting treatment, or normal physiological change, is debated. The current consensus is that age alone is not an indication for TRT, but symptomatic men with low testosterone confirmed on testing benefit from treatment.

Causes of testosterone deficiency include primary testicular failure (Klinefelter syndrome, undescended testes, prior testicular surgery, mumps orchitis, chemotherapy/radiation), secondary hypothalamic-pituitary causes (pituitary tumour, head injury, severe systemic illness), age-related decline, opioid medications, anabolic steroid history (often paradoxically), severe obesity, type 2 diabetes, sleep apnoea, and chronic stress. Identifying the cause guides treatment choices.

What are the symptoms of low testosterone?

Low testosterone produces a syndrome of overlapping symptoms across multiple body systems. The pattern is typically gradual onset, often attributed to ageing, stress, or "just getting older," and frequently dismissed by both men and clinicians who do not connect the symptoms to a specific endocrine condition.

Sexual symptoms are often the most prominent and most likely to drive medical attention:

• Decreased libido (reduced sexual interest), often the first symptom

• Erectile dysfunction, particularly reduced morning erections

• Decreased ejaculatory volume

• Reduced sexual satisfaction

• Fertility issues in men trying to conceive

Physical symptoms affecting body composition and energy:

• Persistent fatigue despite adequate sleep

• Reduced muscle mass and strength, particularly noticeable in men previously athletic

• Increased body fat, particularly abdominal/visceral fat

• Decreased exercise capacity and recovery

• Hot flushes (yes, men get them too)

• Sleep disturbance, including increased sleep apnoea risk

• Decreased bone density, increasing fracture risk

Psychological and cognitive symptoms often misattributed to depression or stress:

• Low mood and depressive symptoms

• Irritability and emotional lability

• Brain fog and cognitive symptoms

• Reduced motivation and drive

• Decreased confidence and assertiveness

• Loss of competitive drive

• Anxiety, particularly performance and social anxiety

Less commonly recognised symptoms:

• Reduced beard growth or facial hair

• Reduced body hair

• Skin changes including reduced thickness, increased fine lines

• Gynecomastia (breast tissue development)

• Testicular shrinkage or softness

• Reduced auditory and visual acuity in some cases

The challenge with diagnosis is that these symptoms overlap with many other conditions including depression, hypothyroidism, sleep apnoea, anaemia, chronic kidney disease, vitamin D deficiency, B12 deficiency, and simple stress and overwork. A proper TRT evaluation excludes other causes before attributing symptoms to testosterone deficiency.

The ADAM (Androgen Deficiency in the Aging Male) questionnaire is a validated 10-question screening tool with approximately 88 percent sensitivity for low testosterone. Positive ADAM screening warrants formal testing. Symptoms alone are not sufficient for diagnosis, but they are necessary alongside biochemical evidence.

Wondering if your symptoms suggest low testosterone? WhatsApp +44 7961 280835 for confidential medical assessment

How is low testosterone diagnosed?

Proper diagnosis of testosterone deficiency requires two separate morning blood tests showing low total testosterone, plus assessment of other relevant hormones, plus careful exclusion of other conditions. The British Society of Sexual Medicine (BSSM) provides the leading UK guidelines for diagnosis and treatment.

Step 1: Initial total testosterone measurement. A morning (8am to 11am) blood test for total testosterone is the first step. Testosterone levels follow a circadian rhythm, peaking in the morning and declining through the day, so timing matters. The test should be performed when not acutely unwell, ideally fasting or near-fasting.

Step 2: Confirmatory repeat test. If the first test shows low testosterone, a second morning sample at least 2 weeks later confirms the result is consistent rather than reflecting transient illness, stress, or sleep disturbance. The BSSM threshold for treatment is total testosterone below 12 nmol/L with symptoms, or below 8 nmol/L with or without symptoms (Endocrine Society and European Association of Urology guidelines).

Step 3: Comprehensive hormone panel. Total testosterone alone gives an incomplete picture. A proper baseline includes:

• Free testosterone or calculated free testosterone (the bioavailable fraction)

• Sex hormone-binding globulin (SHBG), which binds testosterone and reduces bioavailable hormone

• Free androgen index (calculated from total testosterone and SHBG)

• LH and FSH (distinguishing primary testicular failure from secondary hypothalamic-pituitary causes)

• Oestradiol (testosterone is converted to oestradiol; both matter)

• Prolactin (hyperprolactinaemia from pituitary issues can suppress testosterone)

• TSH and thyroid function (hypothyroidism can mimic low T symptoms)

• PSA (prostate-specific antigen, particularly for men over 40 before starting TRT)

Step 4: Comprehensive metabolic panel. Other tests rule out alternative causes of symptoms:

• Full blood count (anaemia mimics fatigue and low energy)

• Vitamin D, B12, folate, ferritin (deficiencies cause fatigue and mood symptoms)

• Liver and kidney function (severe disease affects hormone metabolism)

• HbA1c (diabetes commonly coexists with hypogonadism)

• Lipid profile (cardiovascular baseline)

• High-sensitivity CRP (inflammation)

Step 5: Clinical examination. Examination assesses testicular size and consistency, body habitus, secondary sexual characteristics, gynecomastia, blood pressure, and any physical findings suggesting alternative or contributing diagnoses.

Step 6: Exclusion of contraindications. Active prostate cancer, breast cancer, severe untreated sleep apnoea, severe heart failure, haematocrit above 54 percent (significant polycythaemia), and severe lower urinary tract symptoms with bladder outflow obstruction may require treatment of those conditions first or alternative approaches.

At The Wellness, the diagnostic pathway is structured around BSSM and Endocrine Society guidelines:

• Initial 30-minute consultation: £150

• Comprehensive Hormone Blood Panel (covers all the above): £445

• Repeat confirmatory testosterone test: £195

• Follow-up consultation to review results and treatment plan: £150

This typically takes 2 to 4 weeks total from first contact to confirmed diagnosis and treatment plan. Some clinics offer faster pathways using single test results, but BSSM guidance recommends two confirmatory tests for safety. We follow BSSM guidance.

What types of testosterone treatment are available?

UK-prescribed testosterone formulations include injectable, transdermal, and oral options, each with specific advantages, dosing patterns, and considerations. Choice of formulation depends on individual factors including injection comfort, lifestyle, occupation, fertility goals, and previous treatment experience.

Injectable testosterone formulations:

Nebido (testosterone undecanoate): Long-acting intramuscular injection given every 10 to 14 weeks after loading. Convenient dosing schedule. Steady levels but slow titration. Higher peak immediately after injection. Most commonly used by NHS endocrinology services. Cost approximately £80 to £100 per ampoule, with patients requiring 3 to 4 per year.

Sustanon 250: A blend of four testosterone esters (propionate, phenylpropionate, isocaproate, decanoate) given as intramuscular injection every 2 to 3 weeks. Faster onset and offset than Nebido. Commonly prescribed in NHS and private practice. Cost approximately £20 to £40 per ampoule.

Testosterone cypionate or enanthate (weekly subcutaneous injection): Increasingly preferred in private TRT for stable levels with minimal peaks and troughs. Self-administered weekly subcutaneous injection (similar to insulin) is well-tolerated and convenient. Allows precise dose titration. Cost varies by formulation.

Transdermal testosterone formulations:

Testogel: Daily testosterone gel applied to clean dry skin (typically shoulders, upper arms, abdomen). Standard dose 50mg daily (10g of 0.5 percent gel). Steady daily levels. Risk of transfer to others through skin contact. Cost approximately £40 to £60 per month.

Tostran 2 percent gel: Higher concentration daily gel allowing smaller application area. Standard dose 60mg daily. Cost approximately £40 to £70 per month.

Testavan 2 percent gel: Newer transdermal option with metered pump dispenser. Cost approximately £50 to £70 per month.

Comparison of formulations:

FormulationFrequencyProsConsNebido10 to 14 weeksInfrequent dosing, steady levelsSlow titration, peak after injectionSustanon 2502 to 3 weeksFamiliar to clinicians, well-studiedSome peak/trough variabilityTestosterone cypionate (subcutaneous weekly)WeeklyStable levels, easy titration, comfortable injectionRequires weekly dosingTestogelDailyNo injections, easy adjustmentDaily application, transfer riskTostranDailySmaller application areaDaily application, transfer risk

The Wellness approach is individualised based on patient preferences and clinical factors. Most patients new to TRT start with weekly subcutaneous testosterone cypionate for stable levels and easy titration, or transdermal gel for those preferring no injections. Patients on long-term TRT often transition to longer-acting formulations once stable.

Adjunct medications sometimes used in TRT:

hCG (human chorionic gonadotropin): Maintains testicular function and natural testosterone production during TRT, helps preserve fertility, prevents testicular shrinkage, and improves overall hormone balance for some patients. Typically used at 250 to 500IU subcutaneously twice weekly alongside testosterone.

Clomiphene (Clomid): An alternative to TRT that stimulates natural testosterone production by blocking oestrogen feedback at the hypothalamus. Suitable for men with secondary hypogonadism wanting to preserve fertility, often as monotherapy.

Anastrozole: An aromatase inhibitor occasionally used for men whose testosterone-to-oestrogen conversion is excessive, causing gynecomastia or fluid retention. Should be used cautiously due to bone density concerns.

Compare TRT options with a specialist: WhatsApp +44 7961 280835

How much does TRT cost in London?

Private TRT costs in London 2026 range from £100 to £375 per month depending on the clinic, medication formulation, clinical care included, and subscription model. Understanding the full cost (not just headline medication price) is essential to comparing options fairly.

The Wellness TRT pricing (verified April 2026):

Typical first-year cost at The Wellness: approximately £3,400 to £4,000 total covering full diagnostic workup, treatment initiation, monthly medication, quarterly blood monitoring, and 4 review consultations. Subsequent years typically £2,800 to £3,600 covering medication, monitoring, and reviews.

What is included at the budget end (£99 to £150 per month at online subscription clinics):

• Medication only or medication plus basic consultations

• Online questionnaire-based assessment

• Sometimes excludes blood tests and injection supplies

• Variable in-person clinical input

• Often basic communication and follow-up

What is included in mid-market doctor-led TRT (£200 to £300 per month at The Wellness and similar clinics):

• Full GMC-registered doctor consultation with examination

• Comprehensive baseline blood testing covering hormones plus metabolic and safety markers

• Quarterly monitoring blood tests

• 4+ clinical reviews per year

• Direct WhatsApp or messaging access for questions and side effect management

• Adjustment of dose, formulation, or adjunct medications based on response

• All injection supplies and disposal

What is included at the premium end (£300 to £400 per month at specialist physician practices):

• All of the above

• Endocrinology consultant input where indicated

• More frequent monitoring during titration

• Integration with broader health optimisation services

Why proper monitoring matters more than the lowest price:

TRT is not a benign treatment. Proper monitoring identifies polycythaemia (occurring in 10 to 25 percent of patients), prostate changes, lipid changes, blood pressure changes, and other potential issues. Inadequate monitoring is the main reason "cheap" TRT can become expensive: an avoidable complication costs more in treatment than the savings from minimal clinical care. The British Society of Sexual Medicine and Endocrine Society both recommend quarterly to 6-monthly monitoring during the first year of treatment.

What does the TRT pathway look like at The Wellness?

The TRT pathway at The Online GP by The Wellness follows BSSM and Endocrine Society guidelines, structured around proper diagnosis, individualised treatment, and ongoing monitoring. Eight stages cover the full journey from first contact to long-term maintenance.

Stage 1: Initial consultation (£150, 30 minutes). Detailed history covering symptoms, sexual function, sleep, mood, exercise, diet, alcohol, sleep apnoea risk, fertility goals, family history, and current medications. Examination including testicular palpation, body composition, blood pressure, prostate examination if indicated. ADAM questionnaire administered. By the end you understand what testing is needed and what TRT might involve if confirmed.

Stage 2: Baseline blood testing (£445). Comprehensive hormone panel including total testosterone, free testosterone, SHBG, calculated free androgen index, oestradiol, LH, FSH, prolactin, plus full metabolic panel (FBC, U&Es, LFTs, lipid profile, HbA1c, vitamin D, B12, ferritin, PSA where indicated, TSH, free T4). Sample drawn at our Marylebone clinic, processed by TDL laboratory.

Stage 3: Confirmatory testing (£195). If first testosterone is low, repeat morning sample at least 2 weeks later confirms the result is consistent. This step prevents treating transient testosterone dips from acute illness or stress.

Stage 4: Diagnosis and treatment planning (£150). Once results are available, a structured consultation reviews findings, discusses formulation options, identifies any contraindications, agrees treatment goals, and produces a written treatment plan. Where TRT is not appropriate (alternative diagnoses, contraindications, fertility priorities), other approaches are recommended.

Stage 5: Treatment initiation (£225 first month). Prescription for chosen testosterone formulation. For injectable options, training on safe self-injection technique with video demonstration and supervised first injection. Provision of injection supplies (needles, syringes, sharps bin). For transdermal options, training on application and storage.

Stage 6: Early titration phase (months 1 to 3). Weekly to fortnightly check-ins via WhatsApp during dose titration. Adjustment of dose based on symptom response and any side effects. Most patients reach effective maintenance dose within 8 to 12 weeks.

Stage 7: 3-month review and monitoring bloods (£150 + £195). Comprehensive review including symptom assessment, side effect screening, repeat testosterone measurement (mid-cycle for injection, after 8 to 12 weeks of consistent gel use), full blood count for polycythaemia, oestradiol, PSA, and other safety markers. Dose or formulation adjustment based on results.

Stage 8: Maintenance phase (£225 to £295 per month). Once stable, reviews move to every 3 to 6 months. Medication continues at maintenance dose. Annual comprehensive blood retest. Direct messaging access between appointments. Long-term continuity with the same doctor.

What is included throughout:

• All consultations during titration and maintenance phases

• Direct WhatsApp access to your treating clinician

• Prescription writing and partner pharmacy dispensing

• Injection supplies (needles, syringes, sharps bins)

• Blood test reviews with written commentary

• Side effect management

• Specialist endocrinology referral if needed for complex cases

• Letters to NHS GP on request to maintain integrated record

Begin your TRT pathway: WhatsApp +44 7961 280835 | Email team@thewellnesslondon.com

What can I expect from TRT?

Most men starting TRT see meaningful improvements within 3 to 6 months, with full effects developing over 12 months. Response varies but the majority of patients report substantial benefit when treatment is properly indicated and monitored.

Typical timeline of TRT benefits:

Weeks 1 to 4: Some men report subtle improvements in mood, energy, and wellbeing within the first weeks. Sleep may improve. Libido may begin to return. Side effects from initial titration are most common in this period.

Months 1 to 3: More substantial improvements typically emerge. Energy and motivation improve noticeably. Cognitive symptoms (brain fog, concentration) often improve. Libido and erectile function continue to improve. Mood stabilises. Some increase in muscle response to exercise becomes apparent.

Months 3 to 6: Body composition changes become measurable: increased muscle mass, decreased body fat, particularly with concurrent exercise. Sexual function fully restores in most responders. Mood, energy, and motivation are typically transformed. Hot flushes resolve.

Months 6 to 12: Bone density improvements measurable on DEXA scanning. Cardiovascular markers improve. Insulin sensitivity improves. Long-term mood and cognitive effects fully establish. Most patients reach their stable improved baseline.

Beyond 12 months: Maintenance phase. Continued protection against bone loss, cardiovascular issues, and metabolic decline. Quality of life improvements maintained as long as treatment continues.

Quantifiable outcomes from TRT studies:

• Libido and sexual function: 70 to 80 percent of properly diagnosed responders report significant improvement

• Energy and fatigue: 60 to 75 percent improvement reported

• Mood and depression scores: Significant improvement in 50 to 70 percent of patients with co-existing low mood

• Muscle mass: 5 to 10 percent increase in lean body mass over 6 to 12 months with exercise

• Body fat: 5 to 15 percent decrease in body fat percentage over 6 to 12 months

• Bone density: 1 to 3 percent increase in bone mineral density over 12 months

• Insulin sensitivity: Improved HbA1c in patients with co-existing prediabetes or type 2 diabetes

• Quality of life scores: Substantial improvement in validated questionnaires

Non-responders and partial responders. Approximately 10 to 20 percent of patients are non-responders or partial responders despite achieving target testosterone levels. Investigation of non-response includes verifying actual blood levels are in target range, considering formulation change, evaluating for contributing conditions (depression, sleep apnoea, relationship issues affecting sexual symptoms), and reconsidering whether testosterone deficiency was the primary issue.

Long-term studies including TRAVERSE (published 2023, the largest cardiovascular safety study of TRT) demonstrate no increased risk of major adverse cardiovascular events with appropriately monitored TRT compared with placebo, addressing concerns from older smaller studies. Cardiovascular safety is now well-established for properly-supervised treatment.

Frequently asked questions

Will TRT help my erectile dysfunction?

TRT improves erectile dysfunction in many men with low testosterone, but it is not a primary treatment for erectile dysfunction in men with normal testosterone. Erectile dysfunction often has multiple causes (cardiovascular, psychological, medication-related, neurological) requiring comprehensive evaluation. TRT can be combined with PDE5 inhibitors (Viagra, Cialis) where additional support is needed. Discuss erectile concerns specifically during your consultation.

Can TRT cause prostate cancer?

Current evidence does not support a causal relationship between TRT and prostate cancer development. Active prostate cancer is a contraindication to TRT, and PSA monitoring during treatment ensures any prostate changes are detected early. Some men have prostate enlargement (BPH) that may worsen with TRT requiring management. Pre-existing prostate cancer that is being monitored or treated requires specialist input from urology and oncology.

Will I become dependent on TRT?

TRT is not addictive in the conventional sense, but stopping after extended treatment results in withdrawal symptoms as your body's suppressed testosterone production cannot immediately resume to pre-treatment levels. Most men who benefit from TRT continue treatment long-term as a chronic condition therapy, similar to thyroid hormone replacement or insulin. Stopping is possible but should be done under specialist supervision with planned recovery protocols.

Can I exercise while on TRT?

Yes, and exercise is encouraged. Resistance training combined with TRT produces optimal body composition changes (more muscle, less fat). Cardiovascular exercise supports overall cardiometabolic health. Most men report substantially improved exercise capacity and recovery on TRT once levels stabilise. There are no specific exercise restrictions other than those normal for any medication-managed condition.

Will my insurance cover TRT?

Most UK private medical insurance policies do not cover TRT, treating it as a lifestyle medication rather than treatment for a recognised disease. Some policies cover diagnostic consultations and baseline blood tests where investigating new symptoms. Check your specific policy. We provide itemised invoices to support claims. WhatsApp our team with your insurance details before booking.

Can I do TRT remotely if I don't live in London?

Yes. The Wellness offers TRT initiation and ongoing care via secure video consultation for patients across the UK and internationally. Initial blood testing can be arranged through partner phlebotomy services. Prescriptions can be dispensed at any UK pharmacy or via our partner specialist pharmacy with delivery. Quarterly monitoring blood tests can be arranged at local phlebotomy centres with results forwarded to us for review.

What about anabolic steroids and prior steroid use?

Men with history of anabolic steroid use often present with paradoxically low testosterone after stopping (post-cycle hypogonadism), with their natural production suppressed sometimes permanently. We treat these patients carefully, often using post-cycle therapy approaches initially before assessing whether full TRT is needed. Honesty about prior use is essential for safe and effective treatment.

Book your TRT consultation today

If you suspect you have low testosterone, the worst approach is to ignore it or buy testosterone from unregulated sources. Proper diagnosis and supervised treatment dramatically improves outcomes and minimises risks. The Online GP by The Wellness offers GMC-registered doctor-led TRT with BSSM-aligned diagnostic protocols, comprehensive baseline testing, individualised treatment plans, and ongoing structured monitoring at our Marylebone clinic and via secure video.

Three ways to book today:

WhatsApp: Message +44 7961 280835 for a confidential same-day reply from our medical team.

Email: team@thewellnesslondon.com for detailed enquiries, complex history discussion, or international patient queries.

Phone: 020 3951 3429 to speak directly to our team during clinic hours.

The Wellness, 10 Portman Square, Marylebone, London W1H 6AZ. GMC-registered doctors. Same-day appointments. Doctor-led TRT from £225/month. The right way to do testosterone replacement.

References and further reading

British Society of Sexual Medicine (BSSM) guidelines on diagnosis and treatment of testosterone deficiency

Endocrine Society Clinical Practice Guidelines on testosterone therapy

European Association of Urology guidelines on male hypogonadism

TRAVERSE trial: Cardiovascular safety of testosterone therapy in men with hypogonadism (NEJM, 2023)

National Institute for Health and Care Excellence (NICE) guidance on testosterone

British National Formulary entries for Nebido, Sustanon, Testogel, Tostran, testosterone cypionate

Royal College of General Practitioners position on testosterone deficiency

International Society for Sexual Medicine guidance

Centre for Men's Health UK epidemiological data on testosterone deficiency

Faculty of Sexual and Reproductive Healthcare guidance

Disclaimer: This article is for educational purposes only and does not constitute medical advice. TRT is a prescription-only medication requiring proper diagnosis and ongoing monitoring. Self-prescribing testosterone or obtaining it from unregulated sources is unsafe and illegal. The Wellness is a private healthcare clinic with GMC-registered doctors prescribing within MHRA-licensed indications and following BSSM and Endocrine Society guidance.