Testosterone
Deficiency

Testosterone Deficiency is a recognised medical condition with established UK guidelines for diagnosis and treatment. Low testosterone can significantly impact both short-term and long-term physical and psychological health, yet it remains under-recognised and under-diagnosed. At The Men’s Health Clinic, we are committed to raising awareness and improving understanding so more men can access safe, effective care.

Testosterone Deficiency is defined as:

“A well-established and significant medical condition. It is defined as a clinical and biochemical syndrome associated with advancing age and comorbidities and is characterized by a deficiency in serum androgen levels (with or without decreased genomic sensitivity to androgens) and relevant signs and symptoms.”

“Testosterone Deficiency can adversely affect multiple organ systems and result in significant decreases in quality of life, including changes in sexual function.” – The British Society for Sexual Medicine Guidelines on Male Adult Testosterone Deficiency, with Statements for Practice (2023)

Terms like ‘Male Menopause’ and ‘Andropause’ are misleading and trivialise a condition that can profoundly affect both quality and length of life. Just as we would never deny insulin to a diabetic or effective medication to a hypothyroid patient, the same standard should apply to Testosterone Deficiency.

It’s important to recognise that many symptoms commonly attributed to low testosterone may have other causes. Therefore, a thorough medical history, physical examination, and appropriate blood tests are essential to explore all possible diagnoses before confirming Testosterone Deficiency.

Common symptoms associated with low testosterone include:

Low Mood, Anxiety & Depersonalisation

Restoring male androgen levels often leads to significant improvements in mental well-being. Many patients report reduced reliance on antidepressants following effective therapy.

Fatigue

Persistent tiredness can be debilitating and is often dismissed as “normal aging.” Testosterone Replacement Therapy (TRT) usually enhances energy, motivation, and drive, helping you move forward with renewed vitality.

“Brain Fog”

Difficulty concentrating, muddled thinking, or short-term memory loss are frequent complaints. TRT can clear this cognitive fog, helping you feel mentally sharp again.

Low Libido

Reduced sexual desire is common, with many men describing a loss of their usual “spark.” Testosterone plays a central role in maintaining sexual drive.

Erectile Dysfunction

Problems with erections, including the loss of morning erections, can be embarrassing but are important indicators of underlying hormonal imbalance.

Loss of Strength & Lean Muscle Mass

While less commonly reported initially, reduced muscle mass and strength signal a decline from your previous physical state. Normalising testosterone can help restore muscle tone and strength.

Increased Body Fat

Difficulty losing weight despite a healthy lifestyle is a frequent complaint. TRT often improves body composition over time, aiding fat loss and muscle gain.

Osteoporosis

Reduced bone density is a serious concern that may be overlooked. Testosterone is vital for maintaining bone strength and preventing fractures.

By identifying these symptoms early and investigating thoroughly, appropriate treatment can be initiated to improve both quality of life and long-term health.

When investigating the possibility of Testosterone Deficiency, we recommend a comprehensive diagnostic blood test, which can be arranged through our clinic if needed. These tests should be performed between 07:00 and 11:00, in a fasted state, and not during any acute illness to ensure accuracy. A second, simpler confirmatory test is required approximately four weeks later to validate the diagnosis.

A full diagnostic blood panel typically includes:

• Total Testosterone
• Free Testosterone
• Follicle Stimulating Hormone (FSH)
• Luteinising Hormone (LH)
• Sex Hormone Binding Globulin (SHBG)
• Prolactin
• Oestradiol
• Full Blood Count
• Prostate Specific Antigen (PSA)
• Urea & Electrolytes
• Liver Function Tests
• HbA1c
• Lipid Profile including Cholesterol
• Thyroid Function Tests

This comprehensive testing is essential not only to confirm testosterone deficiency but also to identify potentially reversible causes and exclude contraindications to therapy. To support our clinical evaluation, we also use validated pre-screening tools such as the Aging Male Symptoms Scale, providing a quantitative baseline for symptom assessment.

Testosterone Replacement Therapy (TRT) should only be prescribed when clinically indicated and after a thorough discussion between you and your clinician. TRT is generally considered a lifelong treatment, and the decision to start therapy should carefully weigh the benefits and risks tailored to your individual health needs.

The British Society for Sexual Medicine (BSSM) has published national UK guidelines, based on the latest evidence, to support doctors in providing safe and effective care for patients with confirmed Testosterone Deficiency. Key excerpts from these guidelines include:

Testing Recommendations:

“Serum testosterone should be measured between 7 and 11 AM on at least two occasions, preferably four weeks apart, using a reliable method and not during acute illness.”

Treatment Thresholds:

“Regarding the thresholds for treatment intervention in symptomatic men, BSSM and ISSM guidelines recommend the following:

TT level lower than 8 nmol/L or FT level lower than 180pmol/L (<0.180 nmol/L; based on 2 separate levels from 8 to 11 AM) usually requires T therapy.

Levels from 8 to 12 nmol/L might require a trial of T therapy for a minimum of 6 months based on symptoms.

A FT level lower than 225 pmol/L (0.225 nmol/L) provides supportive evidence for T therapy in the presence of appropriate symptoms.”

Despite this clear guidance, Testosterone Deficiency remains poorly understood among many UK doctors, making access to treatment via the NHS challenging. Often, general practitioners refer patients to local endocrinology services, where adherence to BSSM guidelines is inconsistent. Many endocrinologists rely on their laboratory’s reference ranges and only treat hormone levels considered ‘abnormal,’ which can exclude patients within the lower end of normal who still suffer symptoms.

Reference ranges vary regionally and have been trending downward, reflecting broader public health concerns. While life expectancy may be increasing, overall quality of life often does not improve accordingly.

The Society for Endocrinology’s recent statement on “Male Hypogonadism and Ageing” highlights that hypogonadism is “misdiagnosed, over-diagnosed, and undiagnosed in equal measures.” This underscores the critical need for a thorough and specialist diagnostic assessment by clinicians who prioritise patient-centred care and fully understand the complexities of Testosterone Deficiency.