Cholesterol is a fatty substance that is made by the liver. It can be found all over our bodies and plays an important role in our day-to-day functioning.
If the levels of the different types of cholesterol in our bloodstream become abnormal, they can start to affect how well our heart and circulation works. This is why it is so important that we are aware of our cholesterol levels and take steps to control them.
Too much cholesterol in your blood builds up in the walls of the coronary arteries causing plaques to form. This leads to a narrowing of the coronary arteries, just like hard water furs up a water pipe. Heart attacks can then happen when a blood clot forms in a narrowed coronary artery.