Hormonal changes in men as they age

Hormonal changes in men are a physiological, gradual and multifaceted process that begins long before any pronounced symptoms appear. In clinical practice, doctors find that most patients either underestimate these changes, attributing everything to a ‘midlife crisis’, or, conversely, perceive them as a catastrophic condition without sufficient grounds.

From the perspective of evidence-based medicine, it is important to understand that age-related hormonal decline is normal, just like the appearance of grey hair. However, in some cases, this process develops into a pathological condition (hypogonadism), which literally ‘shuts down’ a man’s active life. Unlike women, whose hormonal balance drops abruptly (menopause), the male body loses its resources gradually. This is insidious: you don’t wake up one day feeling ‘old’; you simply lose 1% of your energy year after year, getting used to feeling like a ‘squeezed lemon’.

The main hormone and its role

The key hormone in the male body is testosterone. Think of it as the chief ‘metabolic manager’. It is not only responsible for libido or muscle mass; it allocates the body’s resources.

From an endocrinological perspective, it regulates:

Sexual function and libido: This is the body’s ‘ignition’. If testosterone levels are low, even spontaneous thoughts of intimacy disappear, and morning erections – the main indicator of vascular and hormonal health – become a rare occurrence.
Muscle mass and strength: Testosterone instructs cells to build muscle. Without it, no matter how much you train, muscle fibres will ‘melt away’, giving way to fat deposits.
B Bone density:B The hormone makes bones strong. A deficiency is a direct route to ‘senile’ fragility and the risk of fractures from minor injuries.
B Mood and energy levels:B Testosterone is responsible for decisiveness and stress resistance. A drop in levels turns a leader into an irritable, perpetually tired person.

As we age, levels gradually decline, and this is a natural process, but the question is how quickly and significantly this decline occurs.

When the changes begin

According to clinical data (e.g., the Massachusetts Male Aging Study):

the decline in testosterone levels begins around the age of 30–35;
the annual decline is approximately 1–2%.

This happens slowly. A man of 40 may feel 100%, but his internal ‘batteries’ have already started to lose their charge. The main mistake is to ignore the first warning signs (sleepiness after lunch, a growing waistline despite the same diet), dismissing it as ‘just getting older’. By the age of 50, almost one in four men already has a clinically significant deficiency.

What is age-related androgen deficiency

In medicine, the term age-related androgen deficiency (or late-onset hypogonadism, LOH) is used.

This condition is characterised by:

a persistent drop in blood testosterone levels;
a change in tissue sensitivity (when the hormone is present in the body, but the cells ‘do not respond’ to it).

It is important to emphasise: not every man faces this condition as he ages. According to statistics, severe forms of deficiency occur in 20–25% of older men. But for this group, life becomes a battle against depression and excess weight, which cannot be won without a doctor’s help.

Mechanisms of age-related changes

To understand what to do, you need to understand exactly how nature ‘steals’ your testosterone. Four mechanisms are at work here:

Decline in testicular function: The ‘factory’ producing the hormone wears out. Over time, the number of cells producing testosterone decreases.
Changes in hormonal regulation: The brain (pituitary gland) stops sending clear commands to the ‘factory’. The link between the control centre and the executor is disrupted.
The SHBG trap: Levels of a specific protein (SHBG) rise in the blood. It acts like a magnet – binding testosterone molecules and rendering them useless for metabolism. In tests, total testosterone may be within the normal range, but there is almost no ‘active’ (free) hormone in the blood – it is all ‘bound’ and locked away.
Reduced receptor sensitivity: This is like a poor connection – the signal is sent, but the receiver does not pick it up. Cells stop responding to the usual doses of the hormone.

How hormonal changes manifest

In clinical practice, symptoms are not merely complaints, but clear markers of the body’s systems breaking down.

Physical manifestations

Muscles are wasting away: You notice that your arms and legs have become visibly thinner, whilst your stomach has grown larger.
Visceral fat: Belly fat is not just a ‘storage depot’; it is an aggressive endocrine organ that actively destroys your testosterone.
Weakness: You used to be able to work late into the night; now, by 6 pm, all you can think about is the sofa.

Metabolic changes

Slowed metabolism: Weight increases literally ‘out of thin air’. The risk of developing type 2 diabetes and high blood pressure rises.

Psycho-emotional symptoms

‘Grumpy man syndrome’: You experience unwarranted irritability and apathy, whilst your former drive and interest in achieving goals disappear.

Sexual function

Decreased libido and problems with erection quality. This is often the first reason a man seeks medical advice, although by this point the problem is usually already systemic in nature.

Andropause: myth or reality

The term ‘andropause’ is more of a convenient metaphor.

Unlike female menopause:

men do not have a clear point of no return when testicular function ceases completely;
a healthy man can retain the ability to conceive even at the age of 80;
changes occur gradually, not abruptly.

Nevertheless, the term is useful for describing a complex of age-related problems. But at the clinic, we prefer to talk about age-related hypogonadism, because this condition is treatable, unlike the inevitable physiological ‘pause’.

Factors accelerating hormonal changes

Your lifestyle can either slow down ageing or put your foot on the accelerator. Testosterone is destroyed by:

Obesity: Adipose tissue contains the enzyme aromatase, which converts male testosterone into female oestrogen. The larger your waistline, the less of a man you are at a biochemical level.
Chronic stress: Cortisol (the stress hormone) is a direct antagonist of testosterone. Their levels cannot be high at the same time.
Lack of sleep: Most testosterone is produced at night. Sleeping for less than 7 hours a day is guaranteed to cause hormone levels to plummet.
Lack of exercise: If your large muscles aren’t working, your body assumes you don’t need testosterone and reduces its production.

When changes become a problem

A condition is considered clinically significant if:

There are pronounced symptoms (loss of energy, loss of libido, increase in visceral fat).
Tests show total testosterone levels below 12 nmol/L.

Only the combination of these two factors warrants serious medical intervention. If the figure is low but you feel fine, this may be your individual norm. If the figure is high but you lack energy, the cause must be sought elsewhere (vitamin deficiency, anaemia or depression).

Diagnostic approaches

Proper diagnosis is not just a random blood test.

Mornings only: Blood must be taken strictly before 10:00. During the day, hormone levels naturally drop, leading to a false-positive result for deficiency.
On an empty stomach: Eating can temporarily lower blood testosterone levels.
Comprehensive test: It is important to look not only at the ‘total’ level, but also at SHBG to calculate the amount of free hormone.
Double-check: A diagnosis is never made based on a single result. At least two confirmed tests are required, taken two weeks apart.

Treatment options

The treatment strategy depends on the severity of the deficiency.

Non-pharmacological measures

These form the foundation, often restoring hormone levels to normal without medication:

Weight loss: Getting rid of excess fat removes the main ‘factory’ responsible for breaking down testosterone.
Strength training: Weight training (basic exercises) sends a powerful signal to the body to synthesise the hormone.
Vitamin D and Zinc: These are key components for testosterone production.

Medication therapy

Testosterone replacement therapy (TRT) is a serious measure. It restores energy and function, but comes at a cost: your own testicles cease to function. HRT is prescribed only by a doctor after ruling out the risk of prostate cancer.

The doctor’s practical advice

Hormonal changes in men are not a death sentence, but a reason to change the rules of the game. From an evidence-based medicine perspective, it is important not to treat test results, but to maintain a high quality of life.

The main principle: don’t look for a ‘magic pill’. Start by reviewing your waistline and sleep quality. If these basics are in order but the symptoms persist – consult a specialist, have tests carried out properly, and regain your male health. Modern medicine allows you to stay in good shape at any age.

FAQ: Answers to frequently asked questions

If I start taking vitamins, will my testosterone levels rise?

Only if a deficiency has been diagnosed. Vitamin D and zinc are building blocks. If the store is already full, delivering extra materials won’t speed up construction. First, make sure there are any deficiencies.

Why is it important to have your testosterone tested in the morning?

Men have a circadian rhythm. Hormone levels peak between 7 and 9 am. By the evening, levels can drop by half. If you have your blood tested in the afternoon, you will get an inaccurately low result.

Does alcohol affect male hormones?

Yes, extremely negatively. Alcohol stimulates the activity of aromatase, which converts testosterone into oestrogen (hence the ‘beer belly’). Furthermore, ethanol is directly toxic to the cells that produce the hormone.

Can testosterone levels be raised through exercise alone?

Yes, provided it involves regular strength training targeting large muscle groups. However, running very long distances can, conversely, lower testosterone levels due to excessive accumulation of the stress hormone cortisol.

Will testosterone gels help if I just want to get in shape faster at the gym?

This is a dangerous mistake. Introducing the hormone from outside blocks the body’s own production. After a short time, your testicles will ‘shut down’, and restoring their function will be very difficult. Hormone therapy is intended for treating illness, not for fitness.

Does testosterone level depend on the regularity of your sex life?

The relationship here is two-way. High hormone levels support libido, whilst regular activity (and even the anticipation of intimacy) stimulates the brain to signal the production of a new batch of testosterone. It is a system that operates on a ‘use it or lose it’ principle.