Improving diet can help reduce levels of cholesterol

The project, based in Cardiff, involves identifying the problem early and educating children of the risks.

Following its success, hospitals in England are now looking to follow suit.

One in 500 people is affected by a genetic disorder which means cholesterol is not broken down in the usual way and accumulates.

High levels of of cholesterol are associated with coronary heart disease and, in some cases, patients can suffer a heart attack during their teens.

The severity of the problem varies, depending on whether one or both parents have the condition.

Researchers at Llandough Hospital in Cardiff are tracing children who have inherited the condition.

High cholesterol levels can be inherited

Special clinics are being run to educate them about the risks they might face.

The work being done with youngsters involves encouraging them to eat less saturated fat - which can increase blood cholesterol - and to take more exercise. They may also have to take medication.

The study was supported by the charity Heart UK, which aims to spread awareness of the fact that high cholesterol levels can lead to heart disease.

The organisation has committed to tracing more than 100,000 people in the UK who have inherited high cholesterol levels, and provide an advisory service for those who want to reduce the risks of heart disease.