Do you know how old your heart is?

Fifty people die every day from heart attacks or strokes that could have been prevented.

Every 30 minutes an early death could have been avoided if middle-aged people ate better, smoked less and exercised more, says Public Health England.

You can check your “heart age” using an online calculator.

It is estimated that four out of five middle-aged people have hearts prematurely damaged by unhealthy habits. One in six men over 40 has a heart 10 years older than he is, PHE estimates.

The test assesses weight, blood pressure, cholesterol, smoking and other illnesses to estimate the age you could reach before having a heart attack.

Jamie Waterall, PHE’S head of cardiovascular disease, said: “Millions are at risk of cardiovascular disease but don’t know it, putting themselves at real risk of suffering ill health or dying younger. Knowing your heart age is a simple way of finding out whether you’re at risk of a heart attack or stroke.

“By making important lifestyle changes you can reduce your risk before it’s too late.”

Damage to the heart accumulates invisibly. Professor Waterall added: “The purpose [of the test] is to make it visible and make people see the impact that these things are having over many years.”

John Deanfield, the professor of cardiology who developed the test, said: “It is never too early to invest in the future health of your arteries to delay or prevent heart attacks and strokes.”

Take the test at nhs.uk/ oneyou/be-healthier/check-yourhealth/heart-age-test