It’s not known exactly what causes the disease to develop, but certain things can increase the risk of getting it.
Some factors that raise the risk can’t be controlled, such as age, ethnicity and family history.
With regards to age, the risk rises as you get older. Most cases are diagnosed in men over the age of 50.
With regards to ethnicity, the condition is more common among men of African-Caribbean and African descent, while it is less common in Asian men.
Regarding family history, having a brother or father who developed prostate cancer before the age of 60 increases the risk.
Having a close female relative who developed breast cancer may also increase the risk of prostate cancer.
However, other factors associated with prostate cancer can be controlled, such as being overweight and the type of diet you follow.
According to Prostate Cancer UK, some studies have found eating and drinking lots of dairy products, such as milk, yoghurt or cheese, might increase the risk of prostate cancer.
The cancer charity said this could be due to the calcium found in dairy products, or could be due to something else.
“Research is ongoing into the links between diet and prostate cancer, and there is some evidence that a diet high in calcium is linked to an increased risk of developing prostate cancer,” added the NHS.
“We need more research to find out whether eating less calcium or fewer dairy products might help to prevent prostate cancer,” said Prostate Cancer UK.
“Until we know more, you might want to try reducing these foods in your diet.”
Prostate Cancer UK warned, however, of the importance of still including some calcium in your diet, as it is essential in keeping the bones healthy.
The cancer charity advises getting about 700mg of calcium a day.
700mg comprises a 200ml glass of milk, 30g of cheese and a small yoghurt.
Some previous studies had also found eating red or processed meat might increase the risk of prostate cancer.
Red or processed meat includes foods such as sausages, burgers, bacon and ham.
However, according to Prostate Cancer UK, more recent research has led to uncertainty over whether these foods actually do increase the risk.