A blood test shows a part of your health you cannot feel: your hormones, your cholesterol, your blood sugar, your liver and kidneys, and in older men often your PSA too. In the Netherlands, close to half of adults have raised cholesterol, and many do not know it. Blood makes things like that visible before you notice anything.
Let us be honest: most men only get blood drawn once something is already wrong. I understand it, but it is a shame. The value of a blood test lies in the quiet moment, when nothing is going on and you have a baseline for later.
In this guide I walk you through the blood values that are often relevant for men, when you need to fast, whether it works without a referral, and how to read your result without panicking. Not a diagnosis, but a compass.
What does a blood test measure in men?
A blood test measures substances floating in your blood: hormones, fats, sugars, proteins, minerals and waste products. Together they give a snapshot of how your body is doing at that moment. It is data, not a verdict. A doctor always looks at the whole, not one isolated number.
Some values move fast, others slowly. Your glucose changes within an hour of eating. Your HbA1c is more like an average over two to three months. The same question, a very different timescale.
Think of the dashboard lights in your car. They do not tell you exactly what is broken, but they point the mechanic in a direction. Blood works the same way: it points, it does not diagnose.
Which blood values matter for men?
There is no fixed list that fits every man, because it depends on your age, your symptoms and your family history. Still, a number of values keep returning in mens panels: hormones, blood fats, blood sugar, thyroid, prostate and a few vitamins and minerals. The table below lays them out.
| Blood value | What it broadly relates to | What a deviation can mean |
|---|---|---|
| Testosterone (total and free, with SHBG) | Energy, libido, muscle mass, mood | Low testosterone is sometimes associated with fatigue and reduced libido, with many possible causes |
| PSA | Prostate | A raised PSA can relate to the prostate, but by no means always to cancer |
| Cholesterol and LDL | Heart and blood vessels | A higher LDL is sometimes associated with cardiovascular risk |
| HbA1c and glucose | Metabolism and blood sugar | A higher HbA1c can point to a higher average blood sugar over months |
| TSH | Thyroid | An abnormal TSH can relate to an over- or underactive thyroid |
| Vitamin D | Bones, muscles, general health | Low vitamin D is common in the Dutch winter |
| Ferritin | Iron stores | Low ferritin can point to iron deficiency, in men too |
These values are not a shopping list to tick off. They mainly show that blood touches several systems at once. Which values make sense for you is best discussed with your GP.
Hormones: is it really all about testosterone for men?
Testosterone is the best-known male hormone, but it never stands alone. Free testosterone, SHBG, LH and sometimes estradiol belong with it, because together they set how much active hormone is available. One testosterone number without context says little.
Testosterone declines gradually with age in men. Research from the Baltimore Longitudinal Study of Aging shows a slow, steady decline from around age thirty (PMID: 11158037). That is normal, not a disease. Still, a low value together with symptoms can be a reason to look further.
Important: testosterone is drawn in the morning, usually fasting, because the value drops through the day. Draw it in the afternoon and your testosterone can look lower than it is. More on that hormonal interplay in male hormonal health.
Heart and vessels: what do cholesterol and blood sugar say?
Cholesterol and blood sugar are the values where cardiovascular risk often shows up first. LDL cholesterol shifts slowly with your eating pattern over weeks. Glucose responds fast to what you just ate, and HbA1c averages that out over months.
Cardiovascular disease is still one of the leading causes of death in men in the Netherlands, according to the Hartstichting. That makes these values interesting for many men, certainly if something runs in the family.
Picture a 45-year-old man who feels fine, but whose father had an early heart attack. His LDL and HbA1c then say more than his reflection. What your blood shows about your heart is worked out in cardiovascular disease in men.
Prostate: what does your PSA value mean?
PSA stands for prostate-specific antigen, a protein your prostate makes. A raised PSA can relate to an enlarged or inflamed prostate, and sometimes to prostate cancer. It is emphatically not a yes-no test for cancer, but a signal that asks for context.
PSA rises with age on average, and many things can raise it temporarily: cycling, sex, or a recent prostate exam. That is why a doctor looks at the whole picture and sometimes at the trend over time.
If you want to know how the PSA test works and what your value can broadly mean by age, read PSA levels by age. The choice to test your PSA is best discussed with your GP, because the test has downsides too.
Thyroid, liver, kidneys and vitamins: the quiet passengers
On almost every broad blood test, values ride along that have nothing to do with hormones or the prostate. Your TSH says something about your thyroid, your ALT and GGT about your liver, and your creatinine and eGFR about your kidneys. They rarely complain, but blood makes them visible.
Vitamin D is one of those. The RIVM estimates that a large part of the Dutch population has a low vitamin D status in winter, especially with little sun and darker skin. That says nothing about you personally, but it shows why this value is often included.
Low ferritin occurs in men too, though it is rarer than in women. In men, a deficiency is never simply normal and always deserves a doctor attention.
Do you need to fast for a blood test?
For some values yes, for others no. Fasting usually means eating nothing for eight to twelve hours and only drinking water. Glucose and triglycerides often ask for it, while your PSA or TSH does not.
If you eat when you were supposed to fast, your sugar and fats can look higher than average. That can make a result needlessly alarming.
What you may and may not do before the draw, from coffee to exercise, is listed in fasting blood test preparation. When in doubt, always ask at the draw location.
Can you get a blood test without a referral?
Yes, you can. In the Netherlands you can get blood drawn on your own initiative without your GP writing a referral. You pay yourself, and you choose which values to measure. For many men that is a low threshold to get started at all.
The flip side: you get a result without a doctor sitting next to you. That is why every test with us includes a professional assessment by a BIG-registered doctor, who puts your values in context.
What you can test yourself and when it is better to see your GP anyway is covered in blood test without a referral.
How do you read your result without a scare?
A result compares your value to a reference range: the range within which most healthy people fall. Outside that range does not automatically mean ill, and inside it does not automatically mean peak fitness. It is a statistical range, not a line between good and bad.
Reference ranges also differ by lab, by age and by sex. A value that falls just outside the range at one lab can sit just inside it at another.
How to read reference ranges and the difference between normal and optimal is explained in understanding your blood values. For what your specific result means, your GP stays the point of contact.
Which blood test suits you?
That depends on where you stand and what you want to know. Want a broad first check, then a basic panel is logical. Looking specifically at hormones and prostate, then a mens panel fits better. The table below helps you pick a direction. See it as a tool, not a prescription.
| Your situation or question | Panel that may fit | What you broadly see in it |
|---|---|---|
| I want a broad first check, no symptoms | Basic health checkup | A number of core values for a first picture |
| I want a broader picture with more markers | Extended health checkup | More values on heart, metabolism, liver and kidneys |
| I want to focus on male-specific values | Complete mens health panel | Hormones, prostate and general health together |
| I am forty-plus and want an age-focused panel | Men over 40 panel | Values that often play a role for men over 40 |
| I mainly want my testosterone in view | Testosterone panel | Testosterone and the hormones that set the context |
Doubting between two panels, then pick the broader one, or talk it over with your GP. A deeper overview of the mens panels is in complete blood test for men.
How often should you test your blood?
There is no fixed recipe, and I am not going to push an interval on you. Some men choose to test periodically to see a line over the years, others only with symptoms or a concrete question. What fits you depends on your age, your health and your family history.
What does help is a baseline. One measurement is a photo, several measurements are a film. That film often says more than a single number, because you see your own trend rather than a population average.
Different values play a role in different life stages. I work that out in how often should a man test his blood, a blood test in your 30s, mens health after 40 and mens health in your 50s.
What I would leave you with
If I could say one thing: do not wait until something squeaks. A blood test at a quiet moment gives you a baseline, and that baseline is worth gold later. You do not have to test everything, you just have to start.
Pick a panel that fits your age and your question, get it drawn calmly, and go through your result with your GP if something stands out. That turns blood from a vague concept into a concrete tool for staying in control.
Sources
- Harman SM, Metter EJ, Tobin JD, et al. Longitudinal effects of aging on serum total and free testosterone levels in healthy men. J Clin Endocrinol Metab. 2001;86(2):724-731. PMID: 11158037.
- RIVM. Vitamin D. National Institute for Public Health and the Environment. https://www.rivm.nl
- Hartstichting. Cardiovascular disease figures. https://www.hartstichting.nl
- Thuisarts.nl. PSA test in men. Dutch College of General Practitioners. https://www.thuisarts.nl
Every blood test result includes a professional assessment from a BIG-registered doctor. If you want to act on your result, discuss it with your GP.
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