TRT: Is Testosterone Replacement Therapy Right for You?

Introduction

Testosterone replacement therapy (TRT) has gone from a niche treatment to a widely discussed men's health topic. More men are getting tested, more clinics offer it, and more conversations are happening about whether declining testosterone is a treatable medical problem — not just an inevitable part of ageing.

But with increased awareness has come increased noise. Bold claims about TRT as an anti-ageing cure-all sit alongside genuine concerns about cardiovascular risk and fertility. The reality is more nuanced.

This guide gives you an honest, evidence-based picture of what TRT is, who is a good candidate, what the benefits and risks actually are, and what to expect if you pursue it.

What Is Testosterone Replacement Therapy?

TRT is a medical treatment that supplements or replaces naturally produced testosterone in men whose levels are clinically low. It is not a performance-enhancing drug in the way anabolic steroids are used by athletes — it's a treatment for a documented hormonal deficiency.

TRT is prescribed when:

1. A man has consistently low testosterone levels on at least two morning blood tests
2. He has symptoms that are attributable to testosterone deficiency
3. There are no contraindications to treatment

The goal of TRT is to restore testosterone to the mid-normal physiological range — not to supraphysiological levels.

Who Is TRT For?

TRT is indicated for men with clinical hypogonadism — a condition characterised by both:

• Biochemical evidence: Total testosterone consistently below approximately 300 ng/dL (10.4 nmol/L) on two separate morning blood tests (thresholds vary by laboratory and guideline)
• Symptomatic evidence: Symptoms such as reduced libido, erectile dysfunction, fatigue, loss of muscle mass, mood changes, or reduced bone density

TRT is not indicated for:

• Men with testosterone in the normal range who simply want to feel "more energised" or improve athletic performance
• Men whose fatigue or mood issues have other explanations (e.g., sleep apnoea, depression, thyroid dysfunction)
• Men wishing to conceive in the near future (TRT suppresses sperm production)

According to the Endocrine Society's 2018 Clinical Practice Guideline on testosterone therapy in men with hypogonadism, TRT should not be routinely offered to men without a clear diagnosis of hypogonadism (PMID: 29562364).

Forms of TRT

Several delivery methods are available, each with pros and cons:

Intramuscular Injections

• How: Injected into muscle (typically every 1–4 weeks, depending on formulation)
• Pros: Cost-effective, highly effective, long track record
• Cons: Testosterone levels fluctuate between doses (peaks and troughs), requiring clinic visits or self-injection

Transdermal Gels and Creams

• How: Applied daily to the skin (shoulders, upper arms, or abdomen)
• Pros: Stable testosterone levels, no injections
• Cons: Risk of transfer to partners or children through skin contact; daily application required

Transdermal Patches

• How: Applied to skin daily
• Pros: Stable levels
• Cons: Skin irritation common; less frequently used

Testosterone Pellets

• How: Subcutaneous implants placed under the skin every 3–6 months
• Pros: Longest-acting, stable levels, no daily dosing
• Cons: Minor surgical procedure required; cannot easily adjust dose once implanted

Oral Testosterone (Newer Formulations)

• How: Taken with meals
• Pros: Non-injectable, convenient
• Cons: Newer to market; absorption can vary; not yet widely available in all markets

Benefits of TRT (What the Evidence Shows)

When TRT is prescribed appropriately to men with confirmed hypogonadism, the evidence supports:

Improved Sexual Function

Multiple randomised controlled trials have demonstrated that TRT improves libido and sexual satisfaction in hypogonadal men. A meta-analysis by Isidori et al. (2005) found significant improvements in sexual desire and erectile function (PMID: 15894166).

Improved Mood and Psychological Wellbeing

Several studies have shown reductions in depressive symptoms and improvements in energy and mood with TRT in hypogonadal men. The effect is most pronounced in men with clearly low levels and mood symptoms.

Improved Body Composition

TRT consistently reduces fat mass and increases lean muscle mass in hypogonadal men, particularly in the trunk area. The effect is enhanced when combined with exercise.

Bone Density

TRT has been shown to increase bone mineral density in hypogonadal men, particularly in the spine and hip — reducing fracture risk with long-term therapy.

Metabolic Benefits

Some evidence suggests TRT can improve insulin sensitivity and reduce markers of metabolic syndrome in hypogonadal men, particularly those who are overweight.

Risks and Considerations

TRT is not without risks. Informed decision-making requires understanding these clearly.

Polycythaemia (Elevated Red Blood Cell Count)

TRT stimulates red blood cell production. If haematocrit (the proportion of red blood cells) rises too high (above ~54%), the risk of blood clots, stroke, and pulmonary embolism increases. Regular monitoring and dose adjustment are essential.

Cardiovascular Risk

This is the most debated area. Earlier studies raised concerns; more recent evidence is reassuring when therapy is properly supervised. The TRAVERSE trial (2023), a large randomised controlled trial in men with hypogonadism and elevated cardiovascular risk, found TRT did not increase the rate of major cardiovascular events compared to placebo (PMID: 37256583).

However, caution remains warranted in men with recent heart attack, stroke, or uncontrolled cardiovascular disease.

Infertility and Testicular Atrophy

TRT suppresses the hypothalamic-pituitary axis, dramatically reducing natural testosterone production and spermatogenesis. This can lead to reduced testicle size and infertility. Men wishing to father children should discuss fertility-preserving alternatives (such as clomiphene or hCG) with their doctor.

Sleep Apnoea

TRT can worsen obstructive sleep apnoea in susceptible individuals. Men with existing sleep apnoea should be monitored carefully.

Skin and Hair

Acne and increased oiliness may occur. TRT can accelerate male-pattern hair loss in genetically predisposed men.

Prostate Health

TRT is contraindicated in men with known prostate cancer. While TRT does not appear to cause prostate cancer, it may accelerate growth in existing undetected cancer. PSA monitoring is part of standard TRT follow-up.

What to Expect: The TRT Process

A responsible TRT journey typically includes:

1. Initial consultation and symptom assessment
2. Blood tests (testosterone, LH, FSH, SHBG, full blood count, PSA, metabolic panel) — on at least two separate occasions
3. Diagnosis and discussion of treatment options
4. Starting therapy with agreed delivery method
5. Follow-up at 3 months: Blood tests to check testosterone levels, haematocrit, PSA
6. Ongoing monitoring every 6–12 months once stable

Most men notice initial improvements in energy and libido within 3–6 weeks. Full effects on body composition and mood may take 3–6 months.

TRT in Singapore: Regulatory Context

In Singapore, testosterone is a prescription-only medication regulated under the Health Sciences Authority (HSA). TRT must be prescribed by a licensed medical doctor following a proper diagnosis.

Doctors prescribing TRT are expected to follow evidence-based clinical guidelines and the Singapore Medical Council's ethical standards, which include informed consent, ongoing monitoring, and avoiding over-medicalisation of age-related hormonal changes.

Frequently Asked Questions (FAQ)

Q: How quickly does TRT work?

A: Libido and energy often improve within 3–6 weeks. Changes in body composition, bone density, and mood typically take 3–6 months of consistent therapy.

Q: Is TRT a lifetime commitment?

A: Not necessarily. Some men use TRT short-term alongside lifestyle changes. However, once TRT is started, natural testosterone production is suppressed and may not fully recover if treatment is stopped — particularly after longer duration.

Q: Can I take TRT and still have children?

A: TRT significantly suppresses sperm production. Men who want to preserve fertility should discuss alternatives (clomiphene, hCG) before starting TRT.

Q: Does TRT cause cancer?

A: TRT does not appear to cause prostate cancer, but it is contraindicated in men with known prostate cancer. Regular PSA monitoring is part of standard TRT follow-up.

Q: Will I need to inject myself?

A: Injection is one option, but not the only one. Gels, creams, patches, and other formulations are available. Your doctor will discuss which is most appropriate for you.

Q: Can I get TRT online in Singapore?

A: Telehealth consultations with licensed Singapore-registered doctors are available through platforms like Noah. However, testosterone is prescription-only, and a proper medical assessment — including blood tests — is required before any prescription.

Is TRT Right for You?

TRT is a legitimate, well-studied treatment for men with confirmed testosterone deficiency. It is not a shortcut to better performance, nor is it something to dismiss as too risky if you genuinely need it.

The right answer depends on your individual results, symptoms, health history, and goals — and should be made in partnership with a qualified doctor who can assess your full clinical picture.

This article is for informational purposes only and does not constitute medical advice. Consult a licensed medical professional before making any decisions about your health or treatment.

Want to find out if TRT is right for you? Start with a confidential consultation with a Noah doctor — evidence-based, no pressure.