Testosterone Therapy in 2026: The Truth About TRT, Its Benefits, Risks and Rising Popularity

Testosterone replacement therapy has become one of the most discussed subjects in men's health. But behind the promises of more energy, stronger muscles, better sleep and renewed confidence lies a more complicated medical story. Here is what the science actually says.

Imagine a man sitting at his desk on a Monday morning. He has slept for eight hours, had his coffee and started his working day. Yet he feels exhausted. His motivation is lower than it used to be, his workouts are producing fewer results, and his interest in sex has changed.

At first, he assumes it is stress. Perhaps he is working too much. Perhaps he needs to exercise more or improve his diet.

Then, one evening, an advertisement appears on his phone.

It promises to help him feel younger, regain his strength, improve his confidence and restore his energy. The product being advertised is testosterone replacement therapy, usually shortened to TRT.

He searches for more information. Within minutes, he finds doctors discussing hormones, fitness influencers sharing their transformation stories, online clinics offering testosterone prescriptions and videos claiming that low testosterone is responsible for almost every problem associated with modern male life.

It is easy to understand why the subject attracts attention.

Testosterone is a genuine and important hormone. Low testosterone can cause real medical problems, and medically supervised replacement therapy can help men with properly diagnosed testosterone deficiency.

But testosterone is not a universal solution for tiredness, ageing, weight gain, low motivation or disappointing gym results.

The distinction matters.

In 2026, testosterone therapy sits at the intersection of legitimate medicine, an expanding men's wellness industry and a growing online conversation about ageing and performance. Understanding where the medical evidence ends and the marketing begins is essential before making decisions about treatment.

This guide explores what testosterone does, why TRT has become so popular, who may benefit, what the risks are, what recent research has established and what remains uncertain.

Key Takeaways

• Testosterone is an important hormone involved in sexual development, reproductive function, muscle maintenance, bone health and red blood cell production.
• Testosterone replacement therapy is designed primarily for men with symptoms and consistently low testosterone confirmed through appropriate medical testing.
• A single low blood-test result is not enough to establish a diagnosis.
• The most reliable diagnostic approach generally involves two separate early-morning testosterone measurements, alongside an assessment of symptoms and possible underlying causes.
• TRT can improve sexual desire, correct certain forms of anaemia and increase lean body mass in appropriately diagnosed men.
• It is not a proven general-purpose treatment for ageing, weight loss, depression, diabetes or athletic performance.
• Testosterone treatment can reduce sperm production and cause infertility while treatment continues.
• Other important risks include increased red blood cell concentration, higher blood pressure, acne, fluid retention and possible complications in men with certain existing medical conditions.
• The 2023 TRAVERSE trial provided important reassurance about major cardiovascular events in a particular group of men, but it did not establish unlimited long-term safety.
• In 2026, careful diagnosis, appropriate prescribing and ongoing monitoring remain more important than achieving a particular testosterone number.

1. Why Has Testosterone Therapy Become So Popular in 2026?

Testosterone is not a new discovery, and doctors have prescribed testosterone for decades. What has changed is the way the subject is discussed, marketed and accessed.

A treatment that was once largely associated with endocrinology and specialist men's health clinics has become a mainstream topic across social media, fitness communities, podcasts and online healthcare businesses.

The search for a biological explanation

Modern life gives people plenty of reasons to feel tired.

Long working hours, poor sleep, sedentary lifestyles, financial pressure, family responsibilities and inconsistent exercise can all affect how someone feels.

For some men, however, the explanation may involve an underlying medical condition.

Testosterone deficiency, medically known as male hypogonadism, can contribute to reduced sexual desire, fewer spontaneous erections, reduced energy, loss of muscle mass and other symptoms.

The difficulty is that these symptoms are not exclusive to low testosterone.

A man experiencing fatigue could have iron deficiency, thyroid disease, depression, sleep apnoea, diabetes or chronic stress. Another may simply be sleeping too little.

Testosterone has become attractive partly because it offers a simple explanation for a complicated collection of experiences.

Instead of investigating several possible causes, it can be tempting to conclude that the problem is hormonal.

That conclusion is sometimes correct. It is not always correct.

Social media has changed the conversation

Testosterone is particularly popular in fitness and self-improvement content.

Videos frequently compare testosterone levels across different age groups, discuss supposed historical declines in male hormone levels or suggest that modern lifestyles are causing a widespread testosterone crisis.

Some discussions contain useful information. Others combine genuine research with unsupported claims.

The visual nature of social media also makes TRT easy to promote. Before-and-after photographs, muscular physiques and personal transformation stories can make a treatment appear more effective and predictable than clinical evidence supports.

But an individual transformation does not establish that testosterone caused every improvement.

Diet, exercise, sleep, other medications and changes in body weight may also contribute.

The growth of online men's health clinics

Another important development is the expansion of telemedicine.

Men can now find online services advertising hormone consultations, laboratory testing, testosterone prescriptions and ongoing treatment programmes.

This can make legitimate healthcare more accessible, particularly for people who have difficulty arranging specialist appointments.

However, easier access also creates challenges.

Some commercial services emphasise symptoms and treatment packages before adequately investigating the underlying cause of a low testosterone result.

A responsible medical service should not treat every man who feels tired as a potential TRT customer.

What about the 110,000+ monthly searches?

The figure of more than 110,000 monthly searches for testosterone therapy is a useful indication of the subject's commercial interest when reported by keyword research platforms.

However, it should be interpreted carefully.

Search-volume figures are estimates, not direct counts of every person searching for treatment. Results depend on the country, keyword, language, date range and research platform.

A keyword estimate also cannot establish how many people have diagnosed hypogonadism.

It measures interest, not disease prevalence.

The important distinction: testosterone therapy is receiving considerable public attention, but increasing searches do not automatically mean that more people medically need testosterone.

2. What Does Testosterone Actually Do in the Body?

Testosterone is an androgen, a type of steroid hormone. It is produced primarily in the testicles in adult men, with smaller amounts produced by the adrenal glands.

The brain plays an important role in controlling its production.

A useful way to understand the system is to imagine a thermostat in a house.

The brain monitors hormone levels and sends signals to the testicles when more testosterone is needed. The testicles respond by producing testosterone. When sufficient hormone is circulating, the brain adjusts its signals.

This process is called the hypothalamic-pituitary-gonadal axis.

Testosterone and the male body

Testosterone influences several biological processes.

Sexual development and reproductive function: During puberty, testosterone helps develop the penis, testes, facial hair, deeper voice and other male secondary sexual characteristics. In adulthood, it contributes to sexual desire and reproductive function.

Muscle development: Testosterone supports muscle protein synthesis and helps maintain lean muscle mass. This is one reason men with significant testosterone deficiency may experience reduced muscle strength and changes in body composition.

Bone health: Testosterone contributes to maintaining bone density. Some testosterone is also converted into oestradiol, an important hormone for male bone health.

Red blood cell production: Testosterone stimulates the production of red blood cells. This can help explain why testosterone deficiency sometimes contributes to anaemia.

Mood and mental function: Testosterone interacts with systems involved in mood, motivation and cognitive processes. However, the relationship is complicated. Low testosterone does not automatically explain depression, poor concentration or memory problems.

Body hair and skin: Testosterone and its more potent derivative, dihydrotestosterone (DHT), influence facial hair, body hair, skin oil production and other characteristics.

Does testosterone naturally decline with age?

Testosterone levels can decline as men grow older, although the pattern varies considerably.

The decline is not identical for everyone. Genetics, health, weight, sleep, medication use and other factors influence individual hormone levels.

A 60-year-old man can have healthy testosterone concentrations, while a younger man may have clinically significant deficiency.

Age alone is therefore not a diagnosis.

Obesity, poorly controlled diabetes, chronic illness, inadequate sleep and certain medications can also contribute to lower testosterone levels.

The important question is not simply whether testosterone is lower than it was at age 20. It is whether the person has a genuine hormone deficiency that explains relevant symptoms.

3. What Is Testosterone Replacement Therapy (TRT)?

Testosterone replacement therapy is a medical treatment that supplies testosterone from an external source.

Its purpose is to restore testosterone concentrations towards an appropriate physiological range in men who have clinically confirmed testosterone deficiency.

Think of it like replacing a missing ingredient in a recipe.

If the body cannot produce enough of a necessary ingredient, supplying an appropriate amount may help restore normal function. Adding more than necessary, however, does not automatically make the result better.

TRT is not the same as anabolic steroid abuse.

Medically prescribed replacement treatment aims to restore physiological hormone levels. Bodybuilding steroid cycles may involve much higher doses, combinations of substances and goals that have nothing to do with correcting a diagnosed deficiency.

Nevertheless, testosterone is a controlled prescription medicine in the United States and a controlled drug in the United Kingdom. It should not be treated as an ordinary fitness supplement.

The four main forms of TRT

1. Testosterone injections

Injections are among the commonly prescribed forms of testosterone replacement.

Depending on the preparation, testosterone may be administered at intervals ranging from relatively frequent injections to longer intervals between doses.

Shorter-acting preparations may be prescribed weekly or every few weeks, depending on the individual treatment plan. Long-acting testosterone undecanoate preparations can provide coverage for several weeks or months.

Advantages:

• Often less expensive than branded gels.
• No daily application.
• Doses can be adjusted by the prescriber.
• Some preparations provide relatively stable levels when appropriately scheduled.

Disadvantages:

• Require injections.
• Testosterone levels may fluctuate depending on the preparation and schedule.
• Injection-site discomfort can occur.
• Some men experience acne, mood changes or changes in energy associated with hormonal fluctuations.

The injection schedule should be determined medically rather than copied from bodybuilding communities.

2. Testosterone gels

Gels are applied to the skin, usually once daily.

Testosterone passes through the skin and enters the bloodstream.

Gels offer a convenient alternative for people who prefer not to receive injections.

Advantages:

• Daily administration without needles.
• Doses can be adjusted.
• Hormone levels can be relatively steady with consistent use.
• Treatment can be discontinued or adjusted without waiting for a long-acting injection to wear off.

Disadvantages:

• Application must be consistent.
• Skin irritation can occur.
• Some products can transfer testosterone to another person through skin contact.
• Daily application may become inconvenient.

Transfer prevention is especially important around children and pregnant women. Patients should follow the product's washing, drying and covering instructions.

3. Testosterone patches

Patches deliver testosterone through the skin over an extended period.

They are designed to provide a relatively continuous supply of the hormone.

Advantages:

• Avoid injections.
• Provide continuous delivery.
• Do not require daily measurement of a gel dose.

Disadvantages:

• Skin irritation and redness can be problematic.
• Some people find wearing patches uncomfortable.
• Availability varies between countries.

Patches are less commonly used in some markets than injections and gels.

4. Testosterone pellets

Pellets are small solid preparations inserted beneath the skin during a minor medical procedure.

They release testosterone gradually over a period of months.

Advantages:

• Treatment does not require daily application.
• Fewer administration appointments may be needed.
• Testosterone is released gradually.

Disadvantages:

• Insertion requires a clinical procedure.
• Bruising, infection or pellet extrusion can occur.
• Once inserted, the dose cannot be adjusted as easily as a gel or short-acting injection.

Pellets are not equally available in all countries.

Which form is best?

There is no universally best formulation.

The choice depends on medical circumstances, personal preferences, availability, cost, convenience and the ability to monitor treatment.

A doctor should explain the advantages and disadvantages of each appropriate option.

4. Who Actually Benefits From Testosterone Therapy?

This is arguably the most important question in the entire TRT discussion.

The strongest medical justification for testosterone replacement is confirmed hypogonadism.

Hypogonadism occurs when the body cannot produce sufficient testosterone because of problems involving the testes or the brain's hormone-regulating system.

Primary hypogonadism

Primary hypogonadism occurs when the testicles cannot produce adequate testosterone despite receiving appropriate signals from the brain.

Possible causes include:

• Genetic conditions such as Klinefelter syndrome.
• Testicular injury.
• Certain infections affecting the testicles.
• Cancer treatment involving chemotherapy or radiation.
• Surgical removal of both testicles.
• Certain disorders affecting testicular development.

Secondary hypogonadism

Secondary hypogonadism occurs when the hypothalamus or pituitary gland does not provide the signals needed for normal testosterone production.

Possible causes include:

• Pituitary disorders.
• Certain tumours affecting hormone regulation.
• Severe obesity.
• Some medications, including opioids.
• Previous use of anabolic steroids.
• Certain chronic illnesses.

The distinction matters because treating the underlying condition may sometimes improve testosterone production without requiring lifelong replacement.

What symptoms can indicate testosterone deficiency?

Symptoms vary, but commonly recognised features include:

• Reduced sexual desire.
• Fewer spontaneous or morning erections.
• Erectile difficulties.
• Reduced body hair.
• Loss of muscle mass.
• Reduced bone density.
• Unexplained anaemia.
• Hot flushes in more severe cases.
• Reduced testicular volume.
• Infertility.

Fatigue, low mood and difficulty concentrating can also occur, but they are less specific.

A man with several symptoms should be evaluated rather than automatically assuming that testosterone is responsible.

Who is TRT marketed to?

Commercial testosterone programmes sometimes target a much wider audience.

Advertisements may appeal to men who want:

• More muscle.
• Faster gym recovery.
• Better motivation.
• Improved concentration.
• Greater confidence.
• Weight loss.
• Better athletic performance.
• A more youthful appearance.

Some of these goals overlap with genuine medical benefits, but that does not mean TRT is an appropriate treatment for every man pursuing them.

For example, a healthy man with normal testosterone levels who wants to gain muscle does not automatically have a medical reason to use testosterone.

Likewise, a man experiencing ordinary age-related fatigue should not be prescribed hormones without investigating other possible explanations.

The distinction between treating a disease and attempting to enhance normal physiology is fundamental.

5. How Is Low Testosterone Diagnosed?

A proper diagnosis involves more than purchasing a home testing kit or receiving a single laboratory result.

Doctors consider symptoms, medical history, physical findings and reliable blood measurements.

Step 1: Discuss symptoms and medical history

The doctor may ask about:

• Sexual desire and erectile function.
• Energy and sleep patterns.
• Changes in muscle strength.
• Previous fertility problems.
• Testicular injuries or surgery.
• Medications.
• Previous anabolic steroid use.
• Chronic illnesses.
• Weight changes.

This helps identify whether the symptoms are consistent with testosterone deficiency.

Step 2: Obtain an early-morning blood test

Testosterone levels naturally fluctuate throughout the day.

For many men, levels are highest in the morning and decline later.

This is why medical guidelines generally recommend measuring testosterone early in the morning, preferably while fasting.

A blood sample collected late in the afternoon may produce a lower result than one collected earlier.

Step 3: Repeat the measurement

A single low result should not normally establish the diagnosis.

The Endocrine Society recommends confirming low testosterone through a second fasting morning measurement.

This is important because temporary illness, inadequate sleep, food intake and normal biological variation can influence results.

The guideline also highlights that a substantial proportion of men with an initially low result may have a normal result when tested again.

Step 4: Interpret the testosterone result

One commonly discussed threshold is 300 nanograms per decilitre (ng/dL).

The American Urological Association uses this figure as a reasonable diagnostic cut-off in its clinical guideline.

However, a laboratory number should not be interpreted in isolation.

The diagnosis requires appropriate symptoms and consistently low measurements, with consideration of the testing method and clinical circumstances.

Some men may also need free testosterone testing.

This can be useful when total testosterone is close to the lower reference limit or when a condition affecting sex hormone-binding globulin makes total testosterone difficult to interpret.

Step 5: Investigate the cause

If deficiency is confirmed, additional investigations may include:

• Luteinising hormone (LH).
• Follicle-stimulating hormone (FSH).
• Prolactin.
• Thyroid testing when indicated.
• Iron studies in selected cases.
• Other pituitary investigations when clinically appropriate.

Doctors may also assess haemoglobin, haematocrit and prostate health before starting treatment.

The objective is not simply to raise a number. It is to understand why the number is low.

6. What Benefits Does the Scientific Evidence Actually Support?

TRT can produce meaningful benefits in men with genuine testosterone deficiency.

However, the benefits differ between individuals and are not equally supported for every outcome.

Sexual desire and sexual function

One of the better-supported benefits is improvement in sexual desire.

Clinical studies have found that testosterone treatment can improve libido in men with low testosterone.

Some men also experience improvements in sexual activity and aspects of erectile function.

However, testosterone is not a universal treatment for erectile dysfunction.

Erectile difficulties can result from diabetes, cardiovascular disease, nerve damage, medication effects, psychological factors and other causes.

If a man's testosterone is normal, increasing it is not an established solution to every sexual problem.

Lean muscle mass

Testosterone supports muscle development.

In men with deficiency, treatment can increase lean body mass and may improve certain measures of muscle strength.

However, the size of the improvement varies.

TRT should not be confused with the effects of high-dose anabolic steroid use, which is associated with substantially different exposure levels and risks.

Anaemia

Testosterone can stimulate red blood cell production.

Some men with testosterone deficiency also have unexplained anaemia.

Research associated with the Testosterone Trials found that testosterone treatment improved haemoglobin levels in some older men with anaemia.

This does not mean testosterone should replace a proper investigation of anaemia.

Iron deficiency, vitamin deficiencies, kidney disease and other causes must still be considered.

Bone density

Testosterone contributes to bone health.

Treatment can increase bone mineral density in some men with low testosterone, particularly at the spine.

However, improving bone density does not automatically mean that treatment prevents fractures.

In a 2024 fracture analysis associated with the TRAVERSE research programme, testosterone treatment did not reduce clinical fractures compared with placebo. Fractures were actually more frequent in the testosterone group.

This is an important reminder that improving one biological measurement does not necessarily translate into a better real-world outcome.

Mood and energy

Some men report improved mood and general well-being.

However, clinical results are less consistent than those for sexual desire.

The Testosterone Trials, published in 2016, investigated older men with low testosterone.

The researchers found improvements in sexual function and some other outcomes, but the vitality trial did not establish a significant benefit for its primary fatigue-related outcome.

In simple terms, testosterone may help certain men feel better, but it should not be advertised as a guaranteed treatment for exhaustion.

What about weight loss?

Testosterone can influence body composition, particularly the balance between lean mass and fat mass.

Some studies report reductions in fat mass among men receiving TRT.

However, testosterone replacement is not an established stand-alone obesity treatment.

Weight management requires attention to nutrition, physical activity, sleep, medications and underlying medical conditions.

What about memory and brain performance?

The evidence remains limited.

Some studies have investigated attention, memory and other cognitive functions, but there is no convincing basis for prescribing TRT as a general cognitive enhancement treatment.

Claims that testosterone reliably improves intelligence, productivity or mental sharpness go beyond established evidence.

7. What Are the Risks and Side Effects of TRT?

Testosterone is a biologically active hormone. Changing its concentration can affect several organs and body systems.

Treatment therefore requires monitoring.

1. Reduced fertility and sperm production

Important risk.

This is one of the most important considerations, particularly for younger men.

When external testosterone enters the body, the brain reduces its signals to the testicles.

The production of LH and FSH can decline.

These hormones are important for normal sperm production.

As a result, external testosterone can significantly reduce sperm production and sometimes cause azoospermia, meaning no sperm are detected in the semen.

The testicles may also become smaller.

Some men recover sperm production after stopping treatment, but recovery is not immediate or guaranteed to be complete in every case.

Men who want children should discuss fertility before starting TRT.

Specialist treatments that stimulate the body's own testosterone production may be appropriate in certain circumstances, but they require individual assessment.

TRT itself should not be assumed to preserve fertility.

2. Increased red blood cell concentration

Testosterone stimulates red blood cell production.

In some men, treatment causes the haematocrit level to become too high, a condition called erythrocytosis.

This can make the blood more concentrated.

Doctors normally check haemoglobin and haematocrit before and during treatment.

If levels become excessive, treatment may need adjustment or interruption.

This is one reason why regular monitoring is not optional.

3. Blood pressure and cardiovascular concerns

The relationship between testosterone therapy and cardiovascular health has received considerable scientific attention.

The evidence has become clearer in some areas, but important questions remain.

The FDA announced class-wide labelling changes in February 2025 after reviewing the TRAVERSE trial and blood-pressure studies.

The agency removed the boxed-warning language concerning increased major cardiovascular events, while requiring warnings about increased blood pressure based on ambulatory blood-pressure monitoring studies.

This is not the same as declaring testosterone risk-free.

Men with hypertension should have their blood pressure monitored, and uncontrolled hypertension requires particular attention.

Other cardiovascular considerations include fluid retention, existing heart disease and individual risk factors.

4. Prostate health

Testosterone influences prostate tissue.

Historically, there have been concerns about whether TRT increases prostate cancer risk.

The evidence is more nuanced than either extreme claim.

A major 2023 prostate safety study, associated with the TRAVERSE programme, examined more than 5,200 men.

During the study, rates of high-grade prostate cancer and several other prostate-related events were low and did not differ significantly between the testosterone and placebo groups.

However, participants were carefully selected. Men with certain prostate cancer risk indicators were excluded.

The researchers also acknowledged that the study was not long enough to settle every question about cancer risk over several decades.

Therefore:

• Current evidence does not establish that appropriately prescribed TRT causes prostate cancer.
• It also does not prove that every formulation is completely safe for every man over the long term.
• Prostate assessment and appropriate monitoring remain important.

5. Sleep apnoea

Sleep apnoea is a condition in which breathing repeatedly becomes interrupted during sleep.

Untreated severe obstructive sleep apnoea is a reason to avoid starting testosterone therapy under the Endocrine Society's guidance.

The relationship between TRT and sleep apnoea is not completely understood.

Some studies suggest that testosterone can temporarily worsen sleep-disordered breathing in susceptible individuals.

Men with loud snoring, daytime sleepiness or witnessed pauses in breathing should discuss possible sleep apnoea with their doctor.

6. Acne and oily skin

Testosterone can increase skin oil production.

Some men develop acne, particularly on the face, shoulders and back.

This is generally a manageable side effect, but it can become uncomfortable or persistent.

7. Fluid retention

Testosterone can cause the body to retain fluid.

This may be particularly concerning for men with certain heart, kidney or liver conditions.

Swelling in the legs or sudden unexplained weight gain should be discussed with a healthcare professional.

8. Mood and behavioural changes

Some people experience changes in mood during testosterone treatment.

These may include irritability, emotional changes or fluctuations in well-being.

Very high doses, especially those associated with non-medical steroid use, can produce more serious psychiatric effects.

The objective of medical TRT is to maintain appropriate physiological levels rather than create unusually high concentrations.

9. Breast tenderness and enlargement

Testosterone can be converted into oestradiol through an enzyme called aromatase.

In some men, this contributes to breast tenderness or enlargement, known as gynaecomastia.

Persistent or painful symptoms should be assessed rather than automatically treated with additional hormones or medications.

10. Other possible side effects

Depending on the formulation, other problems may include:

• Headaches.
• Injection-site pain.
• Skin irritation.
• Increased body hair.
• Worsening male-pattern hair loss in susceptible individuals.
• Changes in cholesterol measurements.
• Fluid retention.
• Changes in testicular size.

The possibility and severity of side effects vary between individuals.

8. What Do the Major Studies and Medical Guidelines Say in 2023–2026?

Several important developments have changed the conversation around testosterone replacement.

Rather than relying on advertisements or individual experiences, it is useful to examine the major research findings.

2023: The TRAVERSE cardiovascular trial

New England Journal of Medicine · June 2023

One of the most important studies was the TRAVERSE trial, published in the New England Journal of Medicine.

Researchers enrolled 5,246 men aged 45–80 who had symptoms of testosterone deficiency, two low fasting testosterone measurements and existing cardiovascular disease or an elevated cardiovascular risk.

Participants received either testosterone gel or a placebo.

The researchers examined whether testosterone treatment increased major cardiovascular events, including:

• Cardiovascular death.
• Nonfatal heart attack.
• Nonfatal stroke.

The results were notable.

Treatment group	Participants experiencing a major event
Testosterone	7.0%
Placebo	7.3%

The trial demonstrated that testosterone was non-inferior to placebo for its primary cardiovascular safety outcome within the study's predefined statistical framework.

However, researchers also observed higher incidences of atrial fibrillation, acute kidney injury and pulmonary embolism in the testosterone group.

This distinction is important.

The trial offered reassurance about major cardiovascular events in the population studied. It did not establish that testosterone has no cardiovascular or other serious risks.

It also cannot automatically be applied to healthy young men, bodybuilding users or men taking unusually high doses.

Source: Cardiovascular Safety of Testosterone-Replacement Therapy – NEJM, 2023.

2023: The prostate safety study

Another important publication examined prostate-related outcomes.

Researchers followed 5,204 men with confirmed low testosterone and relevant cardiovascular risk factors.

They found no statistically significant difference between the treatment and placebo groups in high-grade prostate cancer or several other prostate-related outcomes during the study period.

However, the study excluded men with certain prostate risk factors and had a relatively limited follow-up period for assessing cancers that may take many years to develop.

It provides useful reassurance, not a guarantee of lifelong safety.

Source: Prostate Safety Events During Testosterone Replacement Therapy – JAMA Network Open, 2023.

2024: Updated cardiovascular evidence

A 2024 systematic review and meta-analysis examined cardiovascular outcomes in testosterone replacement studies.

It included 106 studies and more than 15,000 participants.

The analysis did not identify a significant difference in major adverse cardiovascular events between testosterone and placebo groups.

However, the authors also examined arrhythmias and atrial fibrillation, where the available evidence was less conclusive.

The broader lesson is that cardiovascular safety depends on the specific outcome being examined, the population receiving treatment and the length of follow-up.

2025: The FDA changes testosterone warnings

US Food and Drug Administration · February 2025

The FDA announced changes to testosterone product labelling following its review of the TRAVERSE findings and blood-pressure monitoring studies.

Two developments deserve attention.

First, the FDA requested removal of the boxed-warning language concerning increased major adverse cardiovascular outcomes.

Second, it required additional information about increased blood pressure, based on evidence from ambulatory blood-pressure studies.

This was an important regulatory development.

However, removing a particular warning does not mean that the medicine is appropriate for everyone.

Testosterone products still require careful prescribing, and the FDA's labelling information continues to emphasise the risks associated with inappropriate use.

Source: FDA: Testosterone Product Labelling Changes.

2026: The FDA updates its position again

In June 2026, the FDA requested further updates to testosterone product information after reviewing additional evidence.

These included changes concerning age-related hypogonadism and information relating to prostate cancer and benign prostatic hyperplasia.

The FDA's updated position reflects the continuing development of the evidence base.

It should not be interpreted as a blanket recommendation to prescribe testosterone to all older men.

Source: FDA Testosterone Information.

2026: The Endocrine Society emphasises accurate diagnosis

In July 2026, the Endocrine Society issued a statement reinforcing the importance of diagnosing testosterone deficiency correctly.

The Society emphasised several points:

• Symptoms alone are insufficient to establish hypogonadism.
• Testosterone measurements must be accurate and consistently low.
• At least two early-morning fasting measurements are important.
• Routine population-wide screening of asymptomatic men is not supported by sufficient evidence.
• Long-term safety, including prostate cancer safety, still requires further research.

The statement also highlighted a practical problem: laboratory assays are not always equally accurate.

Two different testing methods can produce different results from the same sample.

This matters because an inaccurate test can lead to an incorrect diagnosis.

The Society called for better long-term research into testosterone therapy, including its effects over many years.

Source: Endocrine Society: Clinical Guidance and Statements.

What is the overall scientific picture?

The evidence supports testosterone replacement for men with genuine, confirmed deficiency.

It also suggests that several exaggerated claims about TRT should be treated cautiously.

The most important conclusions are:

1. TRT can improve specific symptoms in appropriately diagnosed men.
2. It is not an established general treatment for ageing.
3. Major cardiovascular safety findings are reassuring for the population studied in TRAVERSE, but do not settle every cardiovascular question.
4. Fertility suppression and increased haematocrit are significant clinical concerns.
5. Long-term prostate and overall safety questions require continued research.

The science is neither a declaration that TRT is dangerous for everyone nor a confirmation that it is a universal health upgrade.

It is a medical treatment with identifiable benefits, limitations and risks.

9. How Much Does Testosterone Therapy Cost in 2026?

Cost is an important consideration because TRT is often a continuing treatment rather than a short course of medication.

The price depends on the country, formulation, brand, insurance coverage, medical supervision and frequency of laboratory testing.

Testosterone therapy costs in the United States

In the US, the cost can vary considerably depending on whether someone has health insurance and which prescription is used.

Generic testosterone injections can be relatively inexpensive.

For example, November 2026 GoodRx pricing lists some testosterone cypionate vial prescriptions at approximately $22–$50 with discount coupons, depending on vial size and quantity.

Testosterone gels are generally more expensive.

GoodRx pricing for selected generic gel prescriptions includes examples around $80–$150 for a package, although prices differ by formulation and pharmacy.

These figures represent medication pricing, not the complete cost of TRT.

Expense	Typical cost consideration
Initial consultation	Depends on insurance and provider
Diagnostic blood tests	May be partly or fully covered
Generic injections	Often relatively inexpensive
Testosterone gels	Usually more expensive than generic injections
Follow-up consultations	May be recurring
Monitoring blood tests	Required periodically
Specialist care	Additional cost where needed

Private TRT programmes may charge substantially more than the medication itself because they include consultations, prescriptions, testing and administrative services.

A complete private treatment programme can therefore cost hundreds of dollars monthly, depending on its structure.

Insurance coverage also depends on whether the treatment is considered medically necessary and whether the prescribed product meets the insurer's requirements.

For current medication comparisons, see GoodRx Testosterone Cypionate Prices and GoodRx Testosterone Prices.

Testosterone therapy costs in the United Kingdom

The UK has a different healthcare structure.

Men who meet the clinical criteria may receive testosterone treatment through the NHS following appropriate assessment and, where necessary, specialist referral.

Patients generally pay the applicable NHS prescription charge in England unless exempt or covered by a suitable prescription payment arrangement. Prescriptions are free in Scotland, Wales and Northern Ireland.

Private treatment is also available.

Published UK private clinic prices in 2026 suggest that:

Treatment or service	Indicative private cost
Testosterone injections	£30–£60 monthly for some medication-only options
Testosterone gels	£70–£120 monthly
Long-acting injections	Approximately £250–£400 per injection
Initial consultation	Approximately £80–£300
Blood testing	Approximately £30–£150 or more per panel
Managed private TRT programmes	Often £100–£200 monthly

These are indicative figures, not fixed national prices. Some clinics bundle medication, consultations and testing into subscriptions, while others charge separately.

For example, a low monthly subscription may not include every blood test or specialist appointment.

A useful comparison is the total cost over 12 months rather than the advertised monthly starting price.

Sources: NHS Health Information and Centre for Men's Health.

What about Morocco and other countries?

Pricing in Morocco can differ significantly from US and UK prices.

The availability of specific testosterone formulations, imported products, pharmacy supply arrangements and specialist services may affect the total cost.

It would be misleading to convert a UK or US private clinic price directly into a Moroccan treatment estimate.

Anyone considering treatment in Morocco should ask a qualified local doctor or endocrinologist about the available prescription options, laboratory costs and follow-up arrangements.

The key principle is the same everywhere: do not compare the price of a testosterone vial with the price of a medically supervised treatment programme.

The latter includes diagnosis and monitoring, which are essential parts of responsible care.

10. How Should You Talk to a Doctor About Low Testosterone?

A conversation about testosterone should begin with symptoms and health history, not a demand for a prescription.

It is perfectly reasonable to ask a doctor whether testosterone deficiency could explain persistent symptoms.

A good consultation should investigate several possibilities.

Prepare a clear description of your symptoms

Instead of saying only that you feel tired, explain what has changed.

• When did the fatigue begin?
• Has sexual desire changed?
• Are morning erections less frequent?
• Have you noticed a loss of muscle strength?
• Has your body weight changed?
• Are you sleeping well?
• Have you experienced mood changes?
• Are you taking medication that could affect hormone production?

Specific information makes it easier for a doctor to identify patterns.

Ask about appropriate testing

Useful questions include:

• Should I have an early-morning testosterone blood test?
• Should the test be repeated?
• Do I need free testosterone testing?
• Could another medical condition explain my symptoms?
• Should we measure LH and FSH?
• Are there medications or lifestyle factors affecting my results?

The doctor may recommend additional tests depending on the findings.

Discuss fertility before treatment

This conversation is especially important for men who may want children in the future.

Tell your doctor if fertility is a current or future priority.

External testosterone can suppress sperm production, even when the treatment is medically prescribed.

A fertility specialist or reproductive endocrinologist may need to become involved.

Understand the monitoring plan

Before starting treatment, ask:

• How frequently will testosterone levels be measured?
• How will blood pressure be monitored?
• When will haemoglobin and haematocrit be checked?
• Is prostate assessment appropriate for my age and risk?
• What symptoms should make me contact the clinic?
• What happens if treatment does not improve my symptoms?

A responsible treatment plan should include a clear method for reviewing whether TRT is actually helping.

11. Red Flags to Watch for in Online TRT Clinics

Online clinics can make healthcare more convenient, but not every commercial service offers the same standard of care.

Before paying for a programme, examine how it approaches diagnosis and treatment.

Red flag 1: A prescription after one blood test

Testosterone levels fluctuate.

A single low result should not normally be enough to establish a diagnosis.

A clinic that immediately offers treatment without appropriate confirmation deserves scrutiny.

Red flag 2: Treating symptoms as proof

Fatigue, low motivation, weight gain and reduced concentration are common experiences.

They do not automatically establish testosterone deficiency.

A proper service investigates other possible explanations.

Red flag 3: Promising dramatic transformations

Be cautious of advertisements guaranteeing:

• Rapid muscle growth.
• Guaranteed fat loss.
• A complete return to youthful energy.
• Improved intelligence.
• Permanent sexual performance improvements.
• Protection against ageing.

These promises go beyond what established clinical evidence supports.

Red flag 4: No fertility discussion

Any clinic prescribing testosterone without discussing fertility is missing an important part of the patient's medical history.

This is particularly concerning for younger men.

Red flag 5: No monitoring after treatment begins

A prescription is not the end of medical care.

Testosterone therapy requires follow-up to assess effectiveness and detect possible adverse effects.

A clinic that simply sends medication without providing a proper monitoring programme is not offering comprehensive care.

Red flag 6: Selling additional hormones automatically

Some programmes market multiple hormones and medications as a standard package.

Additional medication should have a specific medical indication.

Patients should be able to understand why each medicine is being prescribed and what risks it introduces.

Red flag 7: Selling testosterone without a prescription

Testosterone should only be obtained through legitimate medical and pharmacy channels.

Products sold through informal websites or unverified social media accounts may be counterfeit, contaminated or incorrectly labelled.

The convenience of an online purchase is not worth the uncertainty surrounding an unverified medicine.

12. Can You Support Healthy Testosterone Naturally?

Not every man with fatigue or reduced energy needs hormone replacement.

Some lifestyle factors can influence testosterone production and general health.

Lifestyle improvements cannot correct every form of hypogonadism, particularly when there is permanent testicular or pituitary damage.

However, they can help address several reversible contributors to low testosterone.

Improve sleep quality

Sleep is important for normal hormonal regulation.

Poor sleep and insufficient rest can affect testosterone levels.

Aim for a consistent sleep schedule and sufficient sleep duration.

Men who experience loud snoring, breathing interruptions or excessive daytime sleepiness should discuss possible sleep apnoea with a healthcare professional.

Sleep is not a replacement for medical treatment, but it is an important part of overall hormonal health.

Maintain a healthy body weight

Excess body fat, particularly abdominal fat, is associated with lower testosterone levels in some men.

Weight management can improve metabolic health and may improve testosterone concentrations, particularly when obesity contributes to functional testosterone suppression.

However, the relationship is complex.

Not every overweight man has low testosterone, and weight loss does not guarantee that hormone levels will return to normal.

Exercise regularly

Resistance training supports muscle strength and general metabolic health.

Walking, cycling, swimming and other forms of aerobic exercise also contribute to cardiovascular health.

Exercise may produce short-term changes in testosterone concentrations, but these temporary changes should not be confused with a lasting correction of clinically significant hypogonadism.

The main goal should be consistent physical activity and improved overall health.

Eat a balanced diet

The body requires adequate nutrients to maintain normal hormone production.

A balanced diet should provide:

• Sufficient protein.
• Healthy dietary fats.
• Vegetables and fruits.
• Whole grains.
• Sources of zinc.
• Foods containing vitamin D.
• Adequate calories for individual needs.

Extreme calorie restriction and poor nutritional intake can negatively affect reproductive hormones.

However, eating particular foods cannot reliably treat established testosterone deficiency.

Address chronic medical conditions

Diabetes, obesity, chronic illness and certain medications may influence testosterone levels.

Managing these conditions can improve general health and, in some cases, improve hormonal function.

A doctor may also review medications that could contribute to symptoms.

Never stop prescribed medication without medical advice.

Limit excessive alcohol consumption

Heavy alcohol use can negatively affect reproductive health, liver function and hormonal regulation.

Reducing excessive consumption is a sensible part of maintaining general health.

Be careful with testosterone supplements

The supplement industry frequently advertises products as natural testosterone boosters.

Ingredients such as zinc, magnesium, vitamin D, ashwagandha and herbal extracts appear in many formulations.

Some nutrients are important for normal body function, and correcting a genuine deficiency can be beneficial.

But the evidence that commercial testosterone-boosting supplements reliably increase testosterone to clinically meaningful levels is limited.

A supplement claiming to restore testosterone in every man should be treated with caution.

Some products may also contain undeclared pharmaceutical substances.

Natural does not automatically mean effective or safe.

13. Is TRT a Treatment for Ageing?

This question sits at the centre of the modern testosterone debate.

As men grow older, some experience changes in strength, body composition, sexual function and energy.

It is tempting to regard testosterone replacement as a way of reversing those changes.

However, ageing is not a single hormonal disorder.

It involves changes in the cardiovascular system, muscles, bones, metabolism, immune system, sleep patterns and many other biological processes.

Testosterone is only one part of this picture.

The difference between deficiency and normal ageing

A man with clinically significant hypogonadism may benefit from replacing testosterone.

A man with normal testosterone levels who simply wants to feel younger is in a different situation.

The available evidence does not justify routinely prescribing TRT to every older man with a low-normal testosterone measurement.

The Endocrine Society has emphasised that treatment decisions should be individualised, with appropriate symptoms, laboratory evidence and consideration of risks.

Can TRT extend life?

There is no established evidence that testosterone replacement extends the lifespan of otherwise healthy men.

Likewise, it should not be marketed as a proven treatment for preventing dementia, heart attacks or general age-related decline.

Research continues, but these are not established indications for routine testosterone replacement.

Can TRT make someone younger biologically?

There is no validated way to describe medically prescribed TRT as reversing a man's biological age.

Treatment may improve particular symptoms or correct certain physiological deficiencies.

That is meaningful, but it is not the same as reversing ageing.

14. The Future of Testosterone Therapy

The future of TRT will probably involve more attention to individual diagnosis, better laboratory measurements and longer-term monitoring.

Several developments are particularly important.

More accurate hormone testing

Laboratory standardisation is essential.

If different testing methods produce inconsistent results, patients may receive different diagnoses despite having similar biological conditions.

The Endocrine Society's 2026 statement has reinforced the importance of accurate and reliable testosterone assays.

Better standardisation could reduce unnecessary treatment and help identify men who genuinely need it.

Better understanding of cardiovascular safety

TRAVERSE provided important information, but it did not answer every question.

Researchers will need to investigate the significance of atrial fibrillation, pulmonary embolism, kidney injury and other outcomes.

Longer follow-up studies are particularly valuable because some health effects may take years to become apparent.

More attention to fertility preservation

Fertility is a major issue for men considering testosterone treatment.

Greater awareness of the effects of external testosterone on sperm production may encourage more patients to discuss reproductive plans before treatment.

This is particularly relevant for younger men who may otherwise assume that testosterone replacement has no effect on their ability to have children.

Greater scrutiny of commercial clinics

The growth of online men's health services makes professional standards increasingly important.

Patients should be able to expect proper assessment, transparent prices, qualified prescribing, reliable laboratory testing and ongoing follow-up.

Access to healthcare is useful only when the care itself is appropriate.

Personalised treatment rather than chasing numbers

The future of responsible TRT should not be about achieving the highest possible testosterone measurement.

It should be about treating a diagnosed deficiency, improving meaningful symptoms and maintaining hormone levels within an appropriate physiological range.

That is a very different objective from the performance-enhancement culture often seen online.

15. Frequently Asked Questions About Testosterone Therapy

1. What is considered a low testosterone level in men?

A total testosterone level below approximately 300 ng/dL is commonly used as a diagnostic threshold in US clinical guidance. However, the number alone does not establish hypogonadism. Doctors also consider symptoms, repeat morning measurements, laboratory methods and individual medical circumstances.

2. Can a man have low testosterone without experiencing symptoms?

Yes. Some men have relatively low testosterone measurements without noticeable symptoms. Medical guidelines generally do not recommend routinely screening all asymptomatic men or automatically treating an isolated low result.

3. How quickly does TRT start working?

The timeline varies according to the treatment and the symptom being assessed. Some changes in sexual desire may become noticeable within several weeks. Changes in body composition and bone health can take several months or longer. Not every symptom improves, and some men experience little meaningful benefit.

4. Does testosterone therapy cause infertility?

It can. External testosterone suppresses the hormonal signals required for normal sperm production. Some men experience a substantial reduction in sperm count or complete suppression of sperm production. Recovery after stopping treatment varies and may take months or longer.

5. Does TRT increase the risk of prostate cancer?

Current clinical evidence has not established that appropriately prescribed testosterone replacement causes prostate cancer. A major 2023 randomised trial found no significant difference in prostate cancer events between carefully selected treatment and placebo groups. However, long-term safety remains an important research question, and prostate monitoring should be discussed with a doctor.

6. Is testosterone therapy safe for men over 60?

Age alone does not determine whether treatment is appropriate. Some older men have genuine hypogonadism and may benefit from therapy. Others have normal age-related changes or symptoms caused by different medical conditions. Treatment requires individual assessment and monitoring.

7. Can TRT help with weight loss?

Testosterone may improve body composition in men with genuine deficiency, including changes in lean mass and fat mass. However, it is not an established stand-alone weight-loss medication. Diet, exercise, sleep and management of underlying conditions remain important.

8. Can testosterone therapy improve erectile dysfunction?

It can improve sexual desire and may help some men with erectile difficulties when testosterone deficiency is a contributing factor. However, erectile dysfunction has many possible causes. Men with normal testosterone levels should not assume that TRT will solve their problem.

9. Can I take testosterone if I want to have children?

This requires particular caution. External testosterone can suppress sperm production and interfere with fertility. Men planning to have children should discuss alternatives with an endocrinologist, urologist or fertility specialist before starting treatment.

10. Do testosterone injections work better than gels?

Neither formulation is universally superior. Both can provide effective replacement when appropriately prescribed. The choice depends on individual response, convenience, cost, side effects and medical circumstances.

11. Can TRT cause heart attacks?

The 2023 TRAVERSE trial found no significant increase in its primary major cardiovascular outcome among the men studied. However, other safety signals were observed, and testosterone can increase blood pressure. These findings do not establish that treatment is risk-free for every patient.

12. Can I stop TRT whenever I want?

Treatment should not be stopped or changed without discussing it with the prescribing clinician. When external testosterone is discontinued, the body's natural production may take time to recover. Recovery depends on the original cause of deficiency, treatment duration and other individual factors.

13. Is TRT a lifelong treatment?

Not necessarily in every circumstance. Men with permanent testicular or pituitary damage may require long-term replacement. Others may have potentially reversible causes of low testosterone. The need for continuing treatment should be reviewed according to the underlying diagnosis and clinical response.

14. Are natural testosterone boosters effective?

Evidence for most commercial testosterone boosters is limited. Correcting a genuine nutritional deficiency may help normal hormonal function, but supplements cannot reliably replace testosterone in men with established hypogonadism.

16. The Bottom Line: Testosterone Therapy Is Medicine, Not a Shortcut to Youth

Testosterone therapy has a legitimate and important place in modern medicine.

For men with properly diagnosed hypogonadism, it can restore hormone levels and improve specific problems, including reduced sexual desire, certain forms of anaemia and loss of lean body mass.

These benefits should not be dismissed.

But the growing popularity of TRT has also created an environment where the treatment is sometimes presented as something much broader: a solution for ageing, fatigue, poor motivation, weight gain, reduced confidence and almost every difficulty associated with modern male life.

That is where the evidence becomes much less convincing.

Testosterone is not a magic switch that turns back the biological clock. It is a hormone with complex effects throughout the body. Increasing its concentration can produce benefits, but it can also introduce risks.

The 2023 TRAVERSE trial, the 2025 FDA labelling changes and the further developments in 2026 have improved our understanding of testosterone therapy. They have not removed the need for careful diagnosis, appropriate prescribing and ongoing monitoring.

For anyone considering TRT, the most sensible starting point is not an online advertisement or a promise of dramatic transformation.

It is a proper medical assessment.

Two men can experience similar symptoms and require completely different treatments. One may have genuine testosterone deficiency. Another may have sleep apnoea, thyroid disease, depression, obesity or another condition that needs attention.

The correct treatment begins with understanding the cause.

Perhaps the most important lesson from the current research is also the simplest: the goal should not be to have the highest testosterone level possible. It should be to maintain good health, treat genuine medical problems and avoid unnecessary treatment.

In 2026, testosterone therapy deserves neither blind enthusiasm nor automatic rejection.

It deserves careful medicine.

Medical disclaimer: This article is intended for educational and informational purposes only. It is not medical advice, a diagnosis or a recommendation to start, stop or change medication. Testosterone therapy requires assessment and supervision by a qualified healthcare professional.

Sources and Further Reading

The following medical and scientific sources provide the evidence behind this article. Primary research and professional medical guidance are prioritised.

1. Endocrine Society (2018) – Testosterone Therapy in Men With Hypogonadism: Clinical Practice Guideline. Diagnosis, treatment indications, contraindications and monitoring.
2. Endocrine Society (2026) – Endocrine Society: Clinical Guidance and Statements. Updated discussion of diagnostic accuracy, testing and long-term safety.
3. Lincoff et al. (2023), New England Journal of Medicine – Cardiovascular Safety of Testosterone-Replacement Therapy. The major TRAVERSE cardiovascular trial.
4. Bhasin et al. (2023), JAMA Network Open – Prostate Safety Events During Testosterone Replacement Therapy in Men With Hypogonadism. Randomised prostate safety research.
5. US Food and Drug Administration (2025) – FDA Issues Class-Wide Labelling Changes for Testosterone Products. Cardiovascular warning and blood-pressure updates.
6. US Food and Drug Administration (2026) – Testosterone Information. Regulatory information and product labelling.
7. Corona et al. (2024) – Cardiovascular Safety of Testosterone Replacement Therapy in Men: Systematic Review and Meta-analysis.
8. European Association of Urology – EAU Guidelines on Male Hypogonadism. Diagnosis, contraindications and safety monitoring.
9. American Urological Association – Evaluation and Management of Testosterone Deficiency. Clinical recommendations concerning diagnosis and monitoring.
10. Snyder et al. (2016), New England Journal of Medicine – Effects of Testosterone Treatment in Older Men. The Testosterone Trials and their findings on sexual function, vitality and physical performance.
11. GoodRx – Testosterone Cypionate Pricing and Testosterone Pricing. US medication price comparisons.
12. Centre for Men's Health – Testosterone Replacement Therapy Information. UK private treatment information and pricing.