Low Testosterone Is Not Always the Primary Cause
Testosterone levels naturally decline with age. This gradual reduction does not automatically require medical treatment, particularly when levels remain within the normal reference range.
Clinical commentary in the BMJ has highlighted concerns about over-diagnosis and overtreatment in men whose symptoms are non-specific and whose testosterone levels are borderline or within normal limits. Fatigue, reduced concentration, low mood and decreased libido are common complaints in primary care and are often linked to factors such as:
• Chronic sleep deprivation
• Psychological stress
• Depression or anxiety disorders
• Thyroid dysfunction
• Obesity and metabolic syndrome
• Excess alcohol use
In these situations, testosterone therapy may not meaningfully improve symptoms because the underlying cause lies elsewhere. A thorough clinical assessment is therefore essential before considering hormone treatment.
Lifestyle Optimisation as First-Line Management
Before initiating TRT, many clinicians recommend addressing modifiable lifestyle factors. Evidence consistently shows that lifestyle interventions can positively influence endogenous testosterone production and overall wellbeing.
Sleep Quality
Testosterone secretion follows a circadian rhythm and is closely linked to sleep architecture. Research has demonstrated that sleep restriction can significantly lower testosterone levels in otherwise healthy men. Addressing obstructive sleep apnoea, improving sleep duration and reducing late-night screen exposure can restore hormonal balance without pharmacological intervention.
Body Composition and Nutrition
Excess visceral fat is associated with lower testosterone due to increased aromatase activity, which converts testosterone into oestrogen. Weight reduction through dietary intervention has been shown to increase serum testosterone levels in overweight and obese men.
Australian clinical guidance from Healthy Male emphasises that modest weight loss can produce meaningful improvements in testosterone levels and symptoms, particularly in men with metabolic syndrome.
Resistance Training
Regular strength training stimulates testosterone production and improves insulin sensitivity, muscle mass and energy levels. While exercise does not produce the same hormonal increase as TRT in hypogonadal men, it can meaningfully improve symptoms in men whose testosterone is mildly reduced due to lifestyle factors.
Stress Management
Chronic psychological stress elevates cortisol, which can suppress gonadal function over time. Addressing stress through structured interventions such as cognitive behavioural strategies, structured exercise or mindfulness programs may improve both mood and sexual function.
For many men, these lifestyle strategies not only improve testosterone levels modestly but also address the root causes of fatigue and reduced libido.
Fertility Considerations
One of the most important reasons TRT may not be appropriate relates to reproductive goals.
Exogenous testosterone suppresses the hypothalamic-pituitary-gonadal axis. When circulating testosterone rises due to therapy, luteinising hormone production decreases, leading to reduced intratesticular testosterone and impaired spermatogenesis. This can significantly lower sperm count and, in some cases, lead to temporary infertility.
For men planning children, alternative therapies may be considered. Agents such as selective oestrogen receptor modulators or human chorionic gonadotropin stimulate endogenous testosterone production rather than replacing it. These approaches may preserve fertility while improving symptoms in selected cases.
Discussion with an endocrinologist or urologist is strongly recommended before initiating TRT in men of reproductive age.
Complex Cardiovascular or Prostate Conditions
Men with significant cardiovascular disease require careful evaluation before starting testosterone therapy. While recent large trials have provided reassurance regarding cardiovascular safety in appropriately selected men, risk stratification remains important.
The TRAVERSE trial published in The New England Journal of Medicine found no increase in major adverse cardiovascular events in men treated with testosterone compared with placebo. However, expert reviews in Nature Reviews Urology note that long-term data beyond several years are still evolving, particularly in men with established heart disease.
Similarly, men with untreated prostate cancer or significantly elevated prostate-specific antigen levels require further evaluation before considering therapy. TRT is contraindicated in untreated hormone-sensitive malignancy.
Men with complex endocrine disorders such as pituitary disease may also require specialised management rather than standard TRT protocols.
Psychological and Relational Factors
Reduced libido and low motivation are sometimes attributed solely to hormones, yet psychological and relational factors frequently play a substantial role. Relationship stress, unresolved conflict, performance anxiety and depression can all reduce sexual desire independent of testosterone levels.
In such cases, counselling, sex therapy or psychological support may be more effective than hormone therapy. Addressing emotional and relational health can restore libido without medical intervention.
When TRT Is Appropriate
None of the above diminishes the value of TRT for men with confirmed hypogonadism. In appropriately selected individuals, randomised trials published in journals such as JAMA and JAMA Network Open have demonstrated improvements in sexual function, correction of anaemia and increases in bone mineral density.
The key distinction is diagnosis. TRT is most beneficial when clear biochemical deficiency aligns with consistent clinical symptoms.
Final Perspective
Testosterone Replacement Therapy is not a supplement and not a shortcut to vitality. It is a medical treatment intended for men with diagnosed androgen deficiency. While it can meaningfully improve libido, correct anaemia and enhance aspects of wellbeing, it also carries physiological effects that require monitoring.
If you are experiencing fatigue, low mood or changes in sexual function, the most appropriate first step is a comprehensive medical assessment. This includes detailed history, physical examination and properly timed blood tests.
With accurate diagnosis and evidence-based discussion, you can determine whether lifestyle optimisation, alternative therapies or testosterone replacement is the most suitable course of action for your long-term health and personal goals.
