Testosterone and Ageing: What Men Should Know

How testosterone changes with age

Testosterone is the main male sex hormone, important for libido, energy, mood, muscle and bone health. From around the age of 30, testosterone levels tend to decline gradually, often by a small percentage each year. This is a normal part of ageing and is quite different from the sharp hormonal change women experience at menopause. For many men, the gradual fall causes no noticeable problems at all.

When low testosterone causes symptoms

In some men, lower testosterone is linked to symptoms that affect daily life. These can include:

• Reduced sex drive
• Erectile difficulties
• Fatigue and low energy
• Low mood or irritability
• Loss of muscle mass and increased body fat
• Reduced concentration

The difficulty is that these symptoms are non-specific. They overlap with stress, poor sleep, depression, thyroid problems and many other conditions. This is exactly why symptoms alone are not enough to diagnose low testosterone.

Why testing comes first

If you have symptoms that might suggest low testosterone, a doctor will usually arrange a blood test, often taken in the morning when levels are naturally highest, and frequently repeated to confirm the result. They may also check for other causes and assess your general health. Diagnosing a true testosterone deficiency, sometimes called hypogonadism, requires both suggestive symptoms and confirmed low levels on testing. Treating based on a single number, or on symptoms alone, is not reliable.

Testosterone and erectile dysfunction

Low testosterone can contribute to erectile difficulties, but it is rarely the only factor. Many men with ED have normal testosterone, and their difficulties relate to blood flow, nerves or psychological factors. Importantly, erectile dysfunction can be an early warning sign of cardiovascular disease, so it should always prompt a broader health review rather than an assumption that hormones are to blame. Our erectile dysfunction explained page explores these causes further.

Where ED is the main issue, PDE5 inhibitors such as sildenafil and tadalafil are commonly prescribed. They work regardless of testosterone level in many men, must never be combined with nitrate medicines, and should be used only after assessment. You can read more in our Sildenafil guide or compare choices in Tadalafil vs Sildenafil.

About testosterone treatment

When a genuine deficiency is confirmed, a doctor may discuss testosterone replacement therapy. This is a medical treatment with potential benefits and risks, and it requires ongoing monitoring. It is not a general anti-ageing or performance therapy, and using testosterone without a confirmed deficiency can cause harm, including effects on fertility and other health risks. A specialist will weigh the benefits against the risks for your individual situation.

Lifestyle and natural support

Several everyday habits support healthy hormone balance and overall vitality:

• Regular physical activity, including resistance exercise
• Maintaining a healthy weight, since excess body fat can lower testosterone
• Good-quality, consistent sleep
• Limiting alcohol
• Managing stress

These measures benefit your heart, mood and energy regardless of your testosterone level, which makes them worthwhile for almost every man.

The sensible approach

A gradual decline in testosterone is a normal part of ageing, and not every symptom needs hormone treatment. If you have bothersome symptoms, the right path is a conversation with your doctor, appropriate testing, and a plan tailored to you. To explore our wider men's health products, you can shop all.

General information only — not medical advice. Always read the patient information leaflet and consult a doctor or pharmacist before starting any medication.