You have not felt yourself for months: less energy, less drive, slower recovery from your training, and a shorter temper than before. You google your complaints and end up at testosterone. Makes sense, because testosterone gets all the attention. But male hormonal health is about far more than that one hormone. Your energy, libido, muscle mass, bones and mood are driven by a whole system, and one number without the rest can seriously lead you astray.
From age 30 your testosterone declines gradually by about 1 to 2 percent per year, but lifestyle has more influence than age for many men. On this page you read which hormones count, how to spot an imbalance, and which blood values really give clarity. One thing upfront: complaints alone tell you little, blood values tell you the story.
Which hormones shape male health?
The main male hormones are testosterone, free testosterone, SHBG, LH, FSH, oestradiol and cortisol. Together they form a feedback system that drives your drive, strength and recovery. A brief explanation per hormone:
- Total testosterone: the main hormone for libido, strength, muscle mass and mental drive. Most is bound and not active.
- Free testosterone: the small, biologically active fraction (about 1 to 3 percent). This is the form your tissues actually use.
- SHBG (sex hormone binding globulin): the protein that binds testosterone. A high SHBG can make a normal total testosterone clinically low.
- LH (luteinising hormone): the signal from your pituitary that prompts your testicles to produce testosterone.
- FSH (follicle stimulating hormone): drives sperm production together with testosterone. Mainly relevant for fertility.
- Oestradiol: a form of oestrogen that men need too, but too much can cause complaints. Fat tissue converts testosterone to oestradiol.
- Cortisol: your main stress hormone. Chronically high cortisol suppresses testosterone.
The feedback system: from your brain to your testicles
Your testosterone production begins not in your testicles, but in your brain. The hypothalamus releases GnRH, which prompts your pituitary to make LH. LH travels through your blood to the Leydig cells in your testicles, which then make testosterone. When testosterone is high enough, your body reports back and the signalling drops again. This explains why LH is so telling: it tells whether a low testosterone comes from your brain or your testicles, and that difference decides which approach makes sense. You do not need to memorise these names. The point is that one marker without the rest can mislead you.
How do you spot a hormonal imbalance?
A hormonal imbalance in men rarely shows in one complaint. More often you see a combination: persistent fatigue, less libido, loss of muscle mass, gain of belly fat, irritability and poor sleep. One or two complaints say little. Three or more lasting longer than six weeks call for clarification via blood testing. The complaints usually fall into four groups:
- Physical: fatigue, reduced strength, more belly fat, loss of muscle mass, sometimes hot flushes.
- Sexual: less urge for sex, fewer spontaneous morning erections, erection problems and hormones that gradually worsen.
- Mental: irritability, low mood, reduced concentration and motivation.
- Sleep: trouble falling asleep, restless sleep, waking unrested.
Picture a man of 45 who has been listless for months, sleeps worse and has less urge for sex. For him the combination of complaints plus blood values says more than each number alone. Important: these complaints also fit stress, sleep loss, thyroid problems or iron deficiency. That is why blood testing is needed to distinguish the hormonal side from other causes.
How do your hormones change over the years?
In men testosterone declines gradually from around age 30, by 1 to 2 percent per year. This is far slower than the female change of life, with large individual differences. Most men notice little until their 50s. Complaints that touch your daily life often arise only between 50 and 70.
Age is not the only factor. A healthy 60-year-old sometimes has higher values than a stressed 35-year-old with excess weight and poor sleep. What can speed the decline is well studied: excess weight, chronic sleep loss, heavy alcohol use and prolonged stress. A man who loses belly fat often sees a measurable rise in his free testosterone, because fat tissue converts less testosterone to oestradiol. You cannot change age, you can change these factors.
That is why a baseline reading around age 40 is worthwhile. A measurement in a complaint-free period gives you a personal reference point. For the early phase, also read our piece on penopause and the male change of life.
Which blood values give insight into your hormones?
Five markers together tell the story: total testosterone, free testosterone, SHBG, LH and FSH. Their global reference values in adult men:
- Total testosterone: usually 10 to 35 nmol/L. Always test in the morning.
- Free testosterone: about 0.225 to 0.725 nmol/L. The biologically active fraction.
- SHBG: about 18 to 54 nmol/L. A high SHBG can make a normal total low in practice.
- LH: about 1.5 to 9.3 IU/L. Tells whether your brain gives the signal to make testosterone.
- FSH: about 1.4 to 18.1 IU/L. Mainly relevant for fertility questions.
The strength is in interpreting the pattern, not in one number. The decision aid below helps you understand your result. It is a tool, not a replacement for your doctor's judgement.
| Pattern | What it can mean | Logical next step |
|---|---|---|
| Low testosterone + low LH | The brain signal drops, often fits stress, sleep loss, excess weight or medication | Responds best to lifestyle. Discuss with your GP. |
| Low testosterone + high LH | The testicles respond insufficiently, may point to primary hypogonadism | Calls for medical evaluation. |
| Normal testosterone + high SHBG + complaints | Too little free testosterone remains | Measuring free testosterone or SHBG is the key here. |
| Normal testosterone + normal SHBG + complaints | The cause probably lies elsewhere | Think thyroid, iron, cortisol or sleep. |
Two practical points. Always test in the morning before 10 am, because testosterone follows a daily rhythm and is highest then. And confirm an abnormal value with a second reading, because a single result can swing due to sleep, illness or stress on the test day. The Dutch College of General Practitioners (NHG) uses this principle of repeated measurement and assessment in context as a basis for hormonal complaints.
If you want to map these five markers in one go, the Men's Hormones test covers them all, including free testosterone. For a broader picture with thyroid and metabolism, look at the Men over 40 Panel. If you only want to track testosterone, a focused testosterone panel often suffices.
Common hormonal themes in men
Hormonal complaints come in a few recognisable forms. Below are the main themes, each with an article that goes deeper. See this as the signpost of the cluster.
Understanding and optimising testosterone
Testosterone is the most-discussed and most misunderstood male hormone. What a normal value is, why free testosterone counts, and what lifestyle really does, you read in understanding your testosterone levels.
Boosting testosterone naturally
Sleep, training, body composition and food together shape your hormone balance. What really works and what is a myth, you read in boosting testosterone naturally.
Low testosterone and penopause
Penopause is not an official diagnosis, but the complaints are real. What the difference is with late-onset hypogonadism, we cover in penopause and the male change of life.
Stress, cortisol and testosterone
Chronic stress lowers testosterone via your stress hormone cortisol. How that mechanism works and what you can do, you read in cortisol and testosterone.
Erection problems and hormones
Erection problems are often an early signal, not just a sexual issue. The hormonal and vascular factors are in erection problems and hormones.
Fertility and hormones
FSH, LH and testosterone together drive your sperm production. What every man can know about the hormonal side of fertility, you read in male fertility.
Men's health after 40
After 40 more changes than just testosterone. Which tests give a broader picture of hormones, heart and metabolism, we discuss in men's health after 40.
Prostate and PSA
The prostate connects to your hormonal health and becomes more important over the years. What PSA does and does not say, you read in prostate health.
What can you do yourself for your hormone balance?
Lifestyle has more influence on testosterone than age for many men. The four interventions with the strongest evidence are sleep, strength training, body composition and stress reduction. None is a miracle, but together they can make a noticeable difference.
- Sleep 7 to 9 hours per night: with chronically short nights testosterone can measurably drop.
- Strength training with compound exercises: squats, deadlifts and bench press at 70 to 85 percent of your 1RM, 3 to 5 times per week.
- Keep your body fat between 12 and 20 percent: too much belly fat can convert testosterone to oestradiol, too little fat can suppress production.
- Limit chronic stress: high cortisol can suppress testosterone via the stress axis. Walking, breathing exercises and recovery time help.
- Limit alcohol: structurally heavy drinking is associated with lower testosterone.
The nice thing is that these factors reinforce each other. Better sleep lowers your cortisol, lower cortisol makes training more effective, and more effective training improves your body composition. You do not have to do everything perfectly at once. Building one habit at a time works better than a radical overhaul you drop after two weeks. The Dutch Heart Foundation (Hartstichting) and the Netherlands Nutrition Centre (Voedingscentrum) stress exactly this building approach to sleep, movement and food for your overall health. Supplementation with boosters from the supplement shop shows no clinically relevant effect in well-designed studies. Vitamin D and zinc can help, but mainly if your values are already low. Measure first, then supplement.
When do you see the GP?
Make an appointment with the GP if you recognise three or more typical complaints lasting longer than six weeks that touch your daily life. Also with sudden erection problems or blood values outside the reference range: do not wait. The GP can rule out other causes and refer if needed. What to bring to the consult:
- A list of your complaints with start dates and intensity.
- Recent blood results, ideally a morning reading of testosterone, SHBG, LH and FSH.
- An overview of your medication and supplements. Some medicines can suppress testosterone.
- Information about sleep, alcohol, weight and stress.
Testosterone replacement therapy (TRT) is a serious, lifelong step and not a first-line solution for age-related complaints. Per the Endocrine Society guideline, TRT only comes into view with a repeatedly measured low testosterone combined with fitting complaints. The European Association of Urology (EAU) uses similar criteria for late-onset hypogonadism. The Dutch Health Council (Gezondheidsraad) also notes, in health screening, that a result only gains value with the right follow-up: an abnormal value is the start of a conversation, not an end point.
Further reading
Frequently asked questions
Which blood test best measures male hormones?
A reliable basic picture calls for a venous morning reading of total testosterone, free testosterone, SHBG, LH and FSH. The Men's Hormones test covers these markers. Finger-prick and saliva tests give an indication, but are less reliable than a venous draw in an accredited lab. Preferably measure before 10 am.
At what age should I have my hormones checked?
There is no fixed age, but a baseline around 40 is worthwhile for many men. If you have earlier complaints such as persistent fatigue, loss of libido or erection problems, testing at any moment is reasonable. A measurement in a complaint-free period gives you a personal reference point for later.
Can stress lower my testosterone?
Yes, chronic stress can lower testosterone. Long-term high cortisol suppresses the brain signal that drives your testicles, so production falls. This is one of the reasons sleep and stress reduction are as important as training and food for your hormone balance.
Is a low testosterone always a problem?
Not always. A low value without complaints calls for a different consideration than complaints with a low value. Only when a repeatedly measured low testosterone goes together with fitting complaints do doctors speak of a treatable condition. So always discuss your result in the context of your complaints with a doctor.
Getting started
Want to know where you stand? A baseline reading of your hormones is the most concrete first step. The Men's Hormones test maps your five core markers, so you can enter the conversation with your GP well informed.
Disclaimer
Caliberhealth works with BIG-registered doctors who assess your blood results. This article gives general information and is not a substitute for medical advice from a GP or specialist. A blood test is a tool to enter the conversation with your doctor better informed, not a diagnosis in itself. For serious complaints or concerns about your health: contact your GP, or in an emergency call 112.
الكاتب
