More than 446,000 adults in the North West could have undiagnosed high blood pressure, according to a new consumer poll by Blood Pressure UK.

The survey, which focused on adults aged 18 to 64, revealed that more than 11 per cent of the region's population has never had their blood pressure checked.

Undiagnosed high blood pressure can mean a higher risk of strokes, heart attacks, kidney disease or early death.

High blood pressure is largely symptomless and is the single biggest preventable cause of death in the UK.

High-salt diets are a major contributor to high blood pressure.

A total of  21 per cent of the respondents were consuming nearly double the six-gram NHS recommended amount, taking in 12 grams of salt daily.

Despite 90 per cent awareness of the impact of salt intake on blood pressure, 40 per cent of the respondents had not made dietary changes to reduce their salt consumption.

Phil Pyatt, CEO of Blood Pressure UK, said: "It’s hard to believe a little bit of salt can have such an impact on our health, especially when it risks raising our blood pressure.

"Given this, we are urging all adults of all ages to check their blood pressure and take control of their health, along with simple improvements in diet and lifestyle such as eating less salt, more fruit and vegetables and doing more exercise."

Dr Pauline Swift, chair of Blood Pressure UK, said: "Reducing salt is the most cost-effective measure to lower blood pressure and reduce the number of people suffering from strokes, heart and kidney disease and life-changing disabilities associated with this – all of which is completely avoidable.

"We hope our new government will encourage the food industry to use much less salt in their products, with strict target enforcement."

Consequently, national charity Blood Pressure UK is advocating for all adults to check their blood pressure as part of 'Know Your Numbers!' week, September 2 - 8.

Hemini Bharadia, marketing manager for Blood Pressure UK, said: "Having your blood pressure checked at home, at your local pharmacy or GP is a cost-effective and reliable method to manage blood pressure, with growing evidence supporting its benefits.

"With 'Know Your Numbers!' week now upon us, what better way to prioritise your health and get your blood pressure monitored for free.

"You have the power."

For more information, visit bloodpressureuk.org.