elevated cholesterol is harmful
Cholesterol is a fatty substance that is naturally produced by
the body. It is a vital building block of cell membranes (the
protective covering of cells) and hormones, such as estrogen and
testosterone. About 80% of the body's cholesterol is produced by
the liver, while the rest comes from our diets.
Cholesterol only becomes a problem when too much of it builds up
in the blood, particularly the so-called 'bad' cholesterol, LDL.
High levels of LDL cholesterol can encourage the development of
plaques (or bulges) on the inside walls of arteries. When combined
with other risk factors, such as excessive blood clotting and high
blood pressure, this may lead to a heart attack.
Certain dietary and lifestyle factors promote high cholesterol
levels. These include smoking, sedentary behaviour, obesity and
diets high in saturated fats (those found in meat and dairy foods).
Genes also influence cholesterol levels and some people have an
inherited condition, called familial hypercholesterolemia, which
promotes excess blood cholesterol.
Reducing cholesterol, particularly the harmful LDL cholesterol,
can significantly reduce a person's chances of developing heart
disease. Even if you already have heart disease, lowering your
cholesterol level is an important way to stay healthy.