1. Cholesterol is a subcategory of lipids called steroids. This is part of the cell membrane and is used to synthesize some of the human sex and other hormones.

Cholesterol is insoluble in blood and is transported by molecules called lipoproteins.

There are two types of lipoproteins:  high density (HDL) and low density (LDL).

HDL known as “good cholesterol” is mostly protein and not so much fat. It helps prevent cholesterol building up in the arteries. Low levels of HDL increase the risk of heart disease.

LDL known as “bad cholesterol” is mostly fat and not much protein. This can be taken up by the cells lining the arteries and restricting the blood flow. High levels of LDL increase the risk of heart disease.

80% of the cholesterol is produced in our body by the liver and cells and 20% comes from the food we eat. All foods of animal origin have cholesterol including red meat and eggs. Foods with high levels of saturated fats and trans fats should be avoided.

Cholesterol is measured in millimol per litre of blood . The normal level should be under 5mmol/l.