Cholesterol: an essential and vital lipid

Cholesterol is a fat substance that is essential for the proper functioning of our body. It is often misunderstood and sometimes even demonised, yet it plays a crucial role in the production of cell membranes, hormones and vitamin D. In this article, we explain what cholesterol is, what effects it has on health and how to manage it effectively.

What is cholesterol?

Cholesterol is a lipid that is mainly produced by the liver, but is also absorbed through certain foods of animal origin such as meat, cheese and eggs. It travels in the blood by binding to lipoproteins: LDL (low density lipoprotein) and HDL (high density lipoprotein).

In fact, total cholesterol is made up of HDL and LDL, known as good and bad cholesterol respectively. These are lipoproteins that transport cholesterol in the blood:

• Low-density lipoproteins (LDL): often referred to as "bad" cholesterol, transport cholesterol from the liver to the cells. Excess LDL can lead to plaque formation in the arteries and increase the risk of cardiovascular disease.
• High density lipoproteins (HDL): Known as "good" cholesterol, these transport cholesterol from the cells to the liver where it is broken down and removed from the body. A high HDL level is often associated with a reduced risk of heart disease.

What effects does cholesterol have on health?

Excess cholesterol (especially LDL), also known as hypercholesterolaemia, is caused by genetic predispositions, but also by behavioural factors. This excess can cause serious health problems, such as

• Arteriosclerosis: a disease in which the arteries become narrowed and stiff due to the formation of cholesterol plaques, which impairs blood flow.
• Coronary heart disease: The result of a reduced blood supply to the heart, which can cause chest pain (angina pectoris) or a heart attack.
• Cerebrovascular accident (CVA): Caused by a blockage in the blood vessels leading to the brain.

How can you recognise excess cholesterol?

Regular check-ups are essential to detect hypercholesterolaemia. A blood test makes it possible to determine the lipid level in the blood. The normal values are as follows

• LDL cholesterol: < 3.5 mmol/L
• HDL cholesterol: > 1.0 mmol/L for men, > 1.3 mmol/L for women
• Total cholesterol: < 5.0 mmol/L
• Triglycerides: < 1.7 mmol/L

This lipid profile therefore makes it possible to assess the risk of developing cardiovascular disease.

How to Prevent High Cholesterol Levels?

Maintaining healthy cholesterol levels is crucial for the prevention of cardiovascular diseases. A healthy lifestyle is the best way to achieve this, thanks to:

• A balanced diet: Prefer foods that are rich in soluble fiber, such as fruits, vegetables, and whole grains, which can help lower LDL levels. Limit saturated fats found in processed foods, fatty meats, and high-fat dairy products.
• Exercise: Regular physical activity can increase HDL levels and improve overall cardiovascular health.
• Quitting smoking: Smoking lowers HDL levels and increases the risk of heart disease.

Although cholesterol is essential for our bodies, it must be kept at a proper level to prevent cardiovascular diseases. A healthy diet, regular physical activity, and healthy lifestyle habits are key to effectively managing cholesterol levels. Regular lipid profile monitoring is recommended to keep track of blood cholesterol levels. Thus, medical supervision and treatments can play a crucial role in cholesterol management. Understanding and managing cholesterol is therefore essential for a long and healthy life.