Androgen Deficiency in the Ageing Male (ADAM) & Male Hormone Deficiency

Low testosterone, medically known as hypogonadism or Androgen Deficiency in the Ageing Male (ADAM), happens when the body doesn’t produce enough testosterone to support healthy physical, sexual, and emotional function. Testosterone plays an essential role in male development, sexual health, bone and muscle strength, energy levels, and overall well-being, so a significant drop can affect daily life in many ways.

Research suggests that about 26% of men in Singapore have testosterone levels that fall below the normal range, which may lead to testosterone deficiency syndrome (TDS) and a range of symptoms that men often overlook or attribute to ageing. At Elyon Clinic, we provide discreet, patient-focused men’s health care in Singapore, offering evidence-based support for hormone concerns, sexual health issues, and related conditions.

Take The First Step Towards Understanding
Your Hormone Health

If you exhibit signs of low testosterone, such as those linked to TDS, it’s important to consult a doctor for evaluation and, if necessary, develop a treatment plan.

Testosterone Levels in Men by Age

Testosterone typically peaks in early adulthood, then declines gradually each year. While the rate varies between individuals, research suggests that testosterone drops by about 1% each year after age 30, with a sharper decline in some men depending on health, lifestyle, and medical conditions.

Average Total Testosterone Ranges (General Reference)
(values approximate and non-diagnostic)

  • Men in their 20s: ~600–700 ng/dL
  • Men in their 30s: ~500–650 ng/dL
  • Men in their 40s: ~450–600 ng/dL
  • Men in their 50s: ~400–550 ng/dL
  • Men aged 60 and above: ~350–500 ng/dL

Low testosterone isn’t diagnosed by age alone. Doctors assess symptoms, blood tests, and contributing factors before confirming testosterone deficiency.

Testosterone Levels In Men By Age
What Are the Causes of Low Testosterone?​

What Are the Causes of Low Testosterone?

Low testosterone can develop for several reasons. Common causes include:

  • Natural Ageing: Testosterone decreases slowly with age. Some men experience only mild changes, while others develop symptoms linked to ADAM.
  • Medical Conditions: Chronic health issues can disrupt hormone production, such as Diabetes, Obesity, Metabolic syndrome, Thyroid disorders, Pituitary gland problems, Testicular injuries, and Chronic illnesses or infections.
  • Medications and Treatments: Certain drugs may lower testosterone as a side effect, including antidepressants, long-term steroid use, chemotherapy, and narcotic pain medications.
  • Lifestyle Factors: Daily habits influence hormone balance. Lower testosterone may be associated with excessive alcohol consumption, smoking, high stress, lack of sleep, sedentary activity, and poor diet. 

What Are the Symptoms of Testosterone Deficiency?

Testosterone Deficiency Syndrome (TDS) arises when a man’s body doesn’t produce sufficient testosterone. While it can occur at any age, it’s more prevalent in older men. Men with low testosterone levels may experience:

  • Sexual dysfunction: This includes infertility, fewer spontaneous erections, reduced sexual desire, and erectile dysfunction. Testicular size may also decrease.
  • Sleep disturbances: Low testosterone can alter sleep patterns, leading to increased fatigue and insomnia due to elevated cortisol levels, which promote wakefulness.
  • Physical changes: Symptoms may involve decreased bone density, reduced energy, diminished muscle strength and mass, increased body fat, loss of body hair, and, in rare cases, enlarged male breasts. These changes can impact physical appearance and health, potentially affecting self-confidence over time.
  • Emotional changes: Low testosterone can decrease self-confidence and motivation, leading to reduced drive, increased feelings of sadness or depression, and difficulties with memory or concentration.

Male hormone deficiency significantly impacts men’s health, and many seek treatment to address these symptoms, especially when planning to start a family.

Who Is at Risk of Testosterone Deficiency?

Men may have a higher risk of testosterone deficiency if they have:

  • Genetic conditions such as Klinefelter syndrome or Noonan syndrome
  • History of testicular injury or surgery
  • HIV/AIDS
  • Long-term use of medications that affect hormone production
  • Obesity or metabolic syndrome
  • Chronic stress or sleep disorders
  • Significant alcohol intake
Process for Testosterone Deficiency Assessment and Treatment

Our Process for Testosterone Deficiency Assessment and Treatment

Evaluating testosterone deficiency involves several structured steps to ensure accuracy and personalised care.

Step 1: Personal Consultation

Your doctor reviews your symptoms, medical history, lifestyle habits, and any factors that may influence testosterone levels.

Step 2: Physical Examination

This includes an assessment of pubic hair distribution, muscle mass, testicular size, and signs linked to hormonal imbalance.

Step 3: Blood Test for Testosterone

A morning blood test is usually recommended because testosterone is highest earlier in the day. The test typically takes 5–10 minutes.

Step 4: Additional Investigations (If Needed)

If initial results show abnormalities, further tests may include hormone panels, semen analysis, pituitary imaging, genetic studies, and/or testicular ultrasound or biopsy.

Step 5: Diagnosis and Personalised Treatment Plan

Your doctor will discuss the results and recommend suitable treatment options based on your symptoms, age, and overall health.

What Are the Treatments Available for Low Testosterone in Singapore?

The primary treatment for clinically confirmed testosterone deficiency is Testosterone Replacement Therapy (TRT). TRT restores testosterone to a healthy range and may help improve energy, libido, mood, and physical performance.

Types of TRT Available in Singapore

  • Injections (e.g., Nebido): Given every three months.
  • Topical Gels: Applied daily to the shoulders, upper arms, or thighs.
  • Oral Tablets: Taken once or twice daily, depending on formulation.HIV/AIDS
  • Implants: Inserted under the skin and replaced every three to six months.

Most men notice improvements in symptoms within four to six weeks, although changes in muscle mass or physical strength may take three to six months.

Benefits of testosterone replacement therapy (TRT)

TRT can provide meaningful improvements for men diagnosed with testosterone deficiency, addressing both physical and psychological effects:

  • Enhanced sexual health: TRT can increase libido, improve erectile function, and restore sexual confidence, helping men regain intimacy and satisfaction.
  • Boosted energy and reduced fatigue: Men often report feeling more energetic throughout the day, with less lethargy and better overall stamina for work, exercise, and daily activities.
  • Improved mood and emotional well-being: TRT may reduce irritability, low mood, and depressive feelings, supporting better emotional stability and resilience.
  • Sharper cognitive function: Many men notice improvements in focus, memory, and mental clarity, which can enhance productivity and decision-making.
  • Increased muscle mass and strength: TRT helps restore muscle tone and strength lost due to low testosterone, improving physical performance and endurance.
  • Reduced body fat and healthier metabolism: Hormone optimisation can support fat loss, particularly around the abdomen, and may improve metabolic health markers.
  • Stronger bones: TRT contributes to increased bone density, reducing the risk of osteoporosis and fractures as men age.
  • Overall quality of life: By addressing both the physical and psychological impacts of low testosterone, TRT can help men feel more balanced, confident, and able to enjoy life fully.

Frequently Asked Questions on Male Hormone Deficiency

For the most accurate measurement of your testosterone levels, the blood test must be taken in the morning, specifically between 8 AM and 11 AM.

Testosterone levels naturally fluctuate throughout the day, peaking in the early morning for men. Testing outside this window, especially in the afternoon or evening, will likely yield a lower (and potentially misleadingly low) result, as levels can drop by up to 30% later in the day.

At Elyon Clinic, we strictly follow this protocol to ensure that the initial measurement of your Total Testosterone is at its highest potential point, giving us the most reliable baseline to diagnose a clinically significant deficiency. If your morning results are low, further confirmatory tests may be required.

Total Testosterone (TT) – Measures the total amount of testosterone circulating in your bloodstream. However, most of this testosterone is bound to proteins (primarily Sex Hormone-Binding Globulin, or SHBG), making it biologically inactive. While it provides a good overall picture, a high TT level can sometimes be misleading if the binding proteins are also high.

Free Testosterone (FT) – Measures the tiny fraction of testosterone that is unbound to proteins. This “free” fraction is the biologically active hormone that is readily available to be used by your body’s tissues (such as muscles, brain, and sexual organs).

Yes, testing for both Total Testosterone and Free Testosterone is essential for a comprehensive and accurate diagnosis of male hormone deficiency at Elyon Clinic. We test both because a patient can have a Total Testosterone level that appears normal, but if their SHBG is high, their Free Testosterone may be dangerously low, leading to all the classic symptoms of deficiency. By checking both, our doctor gets a complete picture of how much testosterone your body is producing and, more importantly, how much is actually available for use.

In Singapore, clinical guidelines generally define a deficient (low) testosterone level based on the measurement of Total Testosterone in the blood. While laboratory reference ranges can vary slightly, a level is typically considered deficient or low if the Total Testosterone (TT) is below 8 nmol/L on a morning blood test.

  • Grey Zone: Levels between 8 nmol/L and 12 nmol/L are often referred to as a “grey zone” or borderline low. If a patient’s TT falls within this range, and they are experiencing significant symptoms (e.g., fatigue, low libido, mood changes), our doctors will often proceed to check the Free Testosterone level and may consider a therapeutic trial of Testosterone Replacement Therapy (TRT) if appropriate, after careful assessment.
  • Context is Crucial: A diagnosis of male hormone deficiency is never made based on a single blood test result alone. It requires the combination of:
    • a consistently low morning testosterone level, and
    • the presence of clear, associated clinical symptoms.

For most cases of testing and treatment for male hormone deficiency at a private clinic, the costs are generally not covered by Singapore’s national savings scheme or standard private insurance plans.

  • MediSave: Testing for low testosterone and subsequent TRT are typically considered elective treatments for quality-of-life improvement rather than treatments for critical or life-threatening conditions. Therefore, these costs are generally not claimable under MediSave.
  • Private Health Insurance: Standard private health insurance policies, including Integrated Shield Plans (IPs), generally do not cover services related to sexual health, hormone imbalance, or wellness-focused hormone replacement.
  • Exception: If the testosterone deficiency is found to be directly caused by a serious, underlying, covered medical condition (e.g., a pituitary tumour or injury requiring surgery), the diagnostic investigation for the underlying pathology may be covered, but the hormone replacement medication itself is usually excluded.

Patients at Elyon Clinic should anticipate paying for the consultation, blood tests, and medication as out-of-pocket expenses. We recommend contacting your insurance provider directly for clarification on your specific policy benefits.

The time it takes to see results from TRT is gradual and depends on the specific symptom being treated. At Elyon Clinic, we advise patients that consistency is key, and not all benefits appear at once.

  • Sexual Desire (Libido): This is often the fastest improvement, typically noticeable within 3 to 6 weeks of starting therapy.
  • Sexual Performance (Erections): Improvements usually begin within 3 to 6 weeks, though the maximum effect (due to improved vascular health) may take a longer period of 3 to 6 months of consistent therapy.
  • Energy Levels and Mood: Most men report improved energy and a reduction in feelings of depression or irritability within 3 to 6 weeks of initiating treatment.
  • Physical Changes (Muscle/Fat): Changes like increased muscle mass and reduction in body fat take the longest, typically requiring consistent therapy for 3 to 6 months or more to become measurable.
  • Bone Density: This takes the longest to address, requiring TRT for at least 6 to 12 months to measure significant improvements in bone strength and density.

Our doctor will monitor your progress every few weeks initially, adjusting the dosage and type of therapy (e.g., gel vs injection) to help you achieve your desired results as efficiently as possible.

Yes, TRT can significantly and negatively affect a man’s fertility and sperm count. This is a critical discussion point at Elyon Clinic for all younger men considering TRT.

When testosterone is administered externally via TRT, the body’s natural hormone production system receives a signal to shut down its own production of hormones that drive sperm creation (Luteinizing Hormone (LH) and Follicle-Stimulating Hormone (FSH). This can lead to a drastic reduction in sperm count and quality, potentially resulting in temporary infertility.

For men who are currently planning to have children or may want to in the future, TRT is usually contraindicated until family planning is complete.

  • Fertility-Preserving Alternatives: If a patient is diagnosed with low testosterone but desires to maintain fertility, our doctor will explore alternative treatments that boost the body’s natural testosterone production without suppressing sperm count, such as medications like clomiphene citrate or human chorionic gonadotropin (hCG). If fertility is not a concern, TRT is the primary treatment option.

The total expected cost of TRT in a private clinic setting can vary widely, typically ranging from S$100 to S$600 per month in the first year, depending on the treatment method, and stabilising after the initial phase. This cost is broken down into three main components:

  1. Initial Consultation and Diagnostic Tests (One-Time Cost)
    • Consultation: S$30 to S$120 (per visit).
    • Blood Tests: Comprehensive male hormone panels (including Total T, Free T, SHBG, LH, FSH, etc.) can range from S$200 to S$500 per initial comprehensive test. These tests are essential for diagnosis.
  1. Medication/Treatment Cost (Recurring Monthly Cost)
    • Topical Gels/Creams (e.g., Androgel): Approximately S$180 to S$250 per box (lasting about a month), making the monthly cost around this range.
    • Long-Acting Injections (e.g., Nebido): The injection itself costs about S$350 to S$450 per dose. Since this is typically administered every 10-14 weeks, the monthly equivalent is lower, plus a small clinic fee for administration.
  1. Ongoing Monitoring (Recurring/Periodic Cost)
    • Follow-up Consultations: S$30 to S$80 (per visit). These are frequent initially (every few weeks) and then become less frequent (every 3–6 months) once stable.
    • Monitoring Blood Tests: Required periodically (e.g., every 3, 6, or 12 months) to check testosterone, haemoglobin, and prostate-specific antigen (PSA) levels for safety. Each follow-up test can cost between S$80 and S$150.

The highest costs are usually in the first 6-12 months due to frequent testing and dosage adjustments, which then drop significantly once a stable maintenance dose is found.

After your blood sample is taken, you can generally expect the test results to be available and reviewed by your doctor within 3 to 5 working days.

  • Process: The blood sample is sent to an accredited external laboratory in Singapore for analysis. Once the lab processes the results and transmits them back to the clinic, our doctor will then review the comprehensive hormone panel (including Total Testosterone, Free Testosterone, etc.) and check for any potential red flags or areas of concern.
  • Follow-up: We will then arrange a follow-up consultation to discuss the findings, provide a clear diagnosis, and outline the most appropriate next steps for treatment if a deficiency is confirmed.

No, you generally do not need to fast before taking the testosterone blood test at Elyon Clinic.

  • Timing is Key, Not Food: For testosterone testing, the crucial factor is the time of day, not food consumption. Eating breakfast will not significantly alter your testosterone level.
  • Other Related Tests: If your doctor is also checking for underlying issues related to your testosterone deficiency, such as diabetes (glucose levels) or cholesterol, those specific tests may require you to fast. If fasting is required for any part of your blood panel, the clinic staff will clearly inform you of this requirement when scheduling your appointment. When in doubt, it is always best to clarify with the clinic beforehand.

While TRT is generally safe when medically supervised, our doctors ensure patients are aware of the common side effects, which can often be managed through dosage adjustment and regular monitoring:

  • Common, Generally Mild Side Effects:
    • Skin Reactions: Acne or oily skin, particularly in the early stages of treatment.
    • Fluid Retention: Mild swelling in the ankles or feet.
    • Sleep Issues: Development or worsening of sleep apnoea (a sleep disorder where breathing stops and starts).
    • Injection Site Reactions: Pain, bruising, or irritation at the injection site (for patients using intramuscular injections).
  • Less Common, Monitored Side Effects:
    • Erythrocytosis: An increase in the red blood cell count, which can thicken the blood and increase cardiovascular risk. This is why regular monitoring is essential, and blood donation may sometimes be recommended.
    • Prostate Changes: TRT can cause a small increase in the size of the prostate (benign prostatic hyperplasia, or BPH) or raise the Prostate-Specific Antigen (PSA) level. TRT does not cause prostate cancer, but it can accelerate the growth of existing, undiagnosed cancer. Therefore, prostate monitoring (PSA testing) is mandatory.
    • Shrinking Testicles: Since the body stops producing its own testosterone, the testes may shrink in size (testicular atrophy), which is why TRT affects fertility.

If a diagnosed, clinically significant low testosterone level is left untreated, the patient risks the worsening of physical, sexual, and mental health symptoms, potentially leading to long-term health complications.

At Elyon Clinic, we find that untreated low testosterone can lead to:

  • Worsening Sexual Health: Persistent and worsening erectile dysfunction (ED), complete loss of libido (sex drive), and a reduction in spontaneous erections.
  • Mental Health Decline: Increased risk and severity of depression, anxiety, irritability, and chronic fatigue, alongside difficulties with memory and concentration (“brain fog”).
  • Physical Deterioration: Progressive loss of muscle mass and strength, increased accumulation of body fat (especially abdominal fat), and a significant decrease in bone density, leading to an increased risk of osteoporosis and fractures.
  • Metabolic Issues: Low testosterone is closely linked to metabolic syndromes, and untreated deficiency can contribute to the worsening of conditions like Type 2 diabetes and cardiovascular risks.

Treatment with TRT can reverse or halt the progression of these symptoms, significantly improving the patient’s quality of life and overall health profile.

Whether a male hormone deficiency can be fixed by itself depends entirely on the underlying cause of the low testosterone, which is categorised as either primary or secondary hypogonadism.

  • Secondary Hypogonadism (Often Reversible): This is the more common type, where the low testosterone is caused by factors outside the testes (e.g., issues in the pituitary gland or hypothalamus). This type is often reversible if the underlying cause is addressed.
    • Examples: Low T caused by severe obesity, poorly managed diabetes, excessive stress, or the use of certain drugs/medications can often be improved or corrected through aggressive lifestyle changes (weight loss, diet, exercise) and addressing the root medical problem.
  • Primary Hypogonadism (Not Self-Fixing): This type is caused by a problem in the testes themselves (e.g., due to injury, infection, or a genetic condition like Klinefelter syndrome). Since the testes are physically damaged or impaired, they are unable to produce adequate testosterone. This condition is not self-correcting and requires lifelong TRT to manage.

At Elyon Clinic, a thorough diagnostic process helps us determine the cause, guiding us to either recommend reversible lifestyle treatments or permanent replacement therapy.

Meet Dr Vincent Chia

MBE (Harvard Medical School)
MB BCh BAO (Dublin), Graduate Diploma in Family Medicine (NUS)
Certificate In Andrology (Men’s Health)
Member, Society for Men’s Health
Family Physician, Director of Clinical Ethics & Operations

Dr Vincent Chia is a board-accredited Family Physician with over 25 years of clinical experience. Having trained in Ireland and Singapore, he has expertise in Dermatology, Endocrinology, Cardiology, General Surgery, Vascular Surgery, Obstetrics and Gynaecology, Men’s Health, and a special interest in Sports Medicine. Known for his warm and approachable demeanour, Dr Vincent is dedicated to providing comprehensive care and ensuring his patients understand their clinical decisions.

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