Men's health
The PSA test: what it can and cannot tell you
PSA is the main blood test we have for prostate cancer, and it is genuinely useful. It is also imprecise in both directions. Knowing that before you test is the difference between a number that helps and a number that frightens you.
Prostate cancer is the most common cancer in men in the UK. About 1 in 8 men will get it at some point. The blood test most people have heard of is PSA, and it is the best single starting point we have. But it is not a cancer test. It is a clue, and a noisy one, which is why the UK still does not screen every man with it.
What PSA actually measures
PSA stands for prostate-specific antigen. It is a protein made by the prostate, and a small amount leaks into your blood normally. The key word is prostate-specific, not cancer-specific. Anything that irritates, enlarges or inflames the prostate can push the number up. Cancer is one of those things. So is simply getting older.
Why there is no test for everyone, and what changed in 2026
For years the UK had no prostate screening programme at all, because the evidence said PSA was too blunt to offer to every man: it misses some cancers and finds many things that are not cancer. That position has now partly changed.
New in 2026: targeted screening
In May 2026 the UK National Screening Committee recommended, for the first time, a targeted prostate screening programme: a PSA test every two years for men aged 45 to 61 who have a BRCA2 gene change together with a family history of breast, ovarian, pancreatic or prostate cancer. The government accepted this for England in June 2026. What did not change is the wider position: screening every man with PSA is still not recommended, because the test is not reliable enough to do more good than harm across the whole population.
Outside that targeted group, the NHS runs something different: informed choice. Any man aged 50 or over can ask his GP for a PSA test, and the GP should talk through the benefits and the drawbacks first so the decision is genuinely yours. Younger men at higher risk can ask earlier.
The two ways PSA gets it wrong
This is the part that rarely makes it into a headline, and it is the part worth understanding before you decide. Picture two rooms of a hundred people each.
100 people with a RAISED PSA
About 25 have prostate cancer. About 75 do not, and the rise came from something else.
100 people with a NORMAL PSA
Roughly 10 have prostate cancer anyway (studies put it between 7 and 15), so a normal result is reassuring, not a guarantee.
has prostate cancer does not
What the numbers actually look like
What else pushes PSA up
A raised PSA is common and usually has an innocent explanation. The most frequent is simply an enlarged prostate, which happens to most men with age. Other causes include a urine infection, prostatitis (inflammation of the prostate), and recent activity.
Before you test, give the number a fair chance
Some of these are avoidable, and avoiding them saves you an unnecessary scare. Do not have a PSA test if you have ejaculated in the last 48 hours, or done vigorous exercise, particularly cycling, in the last 48 hours (long rides raise PSA by around 10% on average). If you have had a urine infection, wait about six weeks after finishing treatment. Also mention any recent prostate examination or procedure to whoever reviews your result.
Is there a normal level?
There is no single cut-off that means healthy. PSA rises naturally with age, so what counts as worth investigating depends on how old you are.
Above these levels (µg/L) UK guidance suggests a conversation about further tests. They are prompts, not diagnoses, and your own trend over time often says more than any single reading.
Your background changes the age to start
Risk is not spread evenly, and the age at which it is worth having the conversation moves with it. This is the part most often got wrong, in both directions.
Black men
1 in 4Around double the risk, and it tends to appear younger.
Talk to a GP from 45
White men
1 in 8The figure usually quoted for men overall in the UK.
Talk to a GP from 50
Asian men
1 in 13Lower than average risk. Lower is not nil, and stigma still delays conversations.
Talk to a GP from 50
Black men are the group at genuinely raised risk. About 1 in 4 will develop prostate cancer, roughly double the risk of other men, and it tends to appear younger. Prostate Cancer UK advises Black men to talk to their GP about their risk from 45 rather than waiting until 50.
For South Asian men the picture is the opposite of what many people assume. Asian men in England have a lower lifetime risk than White men, around 1 in 13 against 1 in 8, and there is no separate guidance recommending an earlier start. The standard advice from 50 applies. That is worth saying plainly, because it is often assumed to run the other way.
Lower risk is not no risk
Prostate cancer is still the most common cancer in men, and a lower-than-average lifetime risk is nothing like immunity. Community work with South Asian men in the UK has repeatedly found that prostate cancer is treated as a taboo subject, which makes people slower to mention symptoms or ask for a test. Whatever your background, urinary symptoms are worth raising with a GP, and a family history of prostate, breast, ovarian or pancreatic cancer changes the picture more than ethnicity does.
Other things that move the age
- Your father or brother has had prostate cancer. Consider starting the conversation at 45
- There is breast, ovarian or pancreatic cancer in your family, or a known BRCA2 change. This is now the group offered organised screening from 45
- You are over 50 and would rather know than wonder. Any man can ask his GP
- You have symptoms such as going more often, especially at night, or a weaker flow. Speak to a GP rather than starting with a test
What happens after a raised result
A raised PSA does not lead straight to a biopsy any more. UK practice is now to do an MRI scan of the prostate first. That scan spares a lot of men a biopsy they did not need, and where a biopsy is still wanted it makes it far more targeted. This is a real improvement on how prostate testing worked ten years ago, and it is part of why the balance of harms has shifted.
Screening every man with the PSA test is not recommended, because the test is not reliable enough to identify prostate cancer that needs treatment.
UK National Screening Committee position, 2026
So should you have one?
That is genuinely a personal decision, and we would rather say so than sell you a certainty that does not exist. A PSA test is worth considering if you are over 50, or over 45 with the risk factors above, and you would rather have the information than not. It is less useful if a borderline result would cause you significant anxiety without changing what you would do next. Whatever you decide, a PSA number on its own settles nothing. It is read alongside your age, your symptoms, your history and, if needed, a scan. For a fuller discussion of your own risk, Prostate Cancer UK has a good risk checker, and your GP can talk it through with you.
PSA will be included in our men's health and longevity panels when we open.
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