the cholesterol-LDL “bad cholesterol”

Cholesterol - LDL bad cholesterol

Cholesterol – LDL “bad cholesterol”  :

There are several fractions or forms of cholesterol in the blood and in the tissues. The cholesterol-LDL corresponds to the bulk of the total cholesterol in the blood. Although product in the body, it is modified by external factors, such as diet, physical activity or tobacco. The cholesterol-LDL is also known as “bad cholesterol” because its increase is related to an increase of cardiovascular risk.

the cholesterol-LDL "bad cholesterol" cholesterol

What is the cholesterol-LDL?

Bad cholesterol The cholesterol-LDL is a lipoprotein, that is to say, a substance formed of lipids and proteins called low density. This fraction corresponds to the bulk of the total cholesterol carried in the blood. When it is not used or it is found in excess, the cholesterol-LDL is deposited in the walls of vessels to form of atherosclerotic plaque, thus constituting a cardiovascular risk factor. Dosage of cholesterol-LDL in the blood, that is the fraction of the cholesterol contained in lipoproteins LDL type This corresponds to the essential of cholesterol transported in the blood. The formula of Friedewald allows you to calculate the value of the cholesterol -LDL from the total cholesterol, the cholesterol-HDL and triglycerides. The dosage of the cholesterol-LDL and its relationship with the fraction LDL and triglycerides is a useful element to assess the risk atheromateux.

How does the levy?

The levy is done from venous blood (in general in the crease of the elbow). It is essential to be fasted for 12 hours. Normal Values of cholesterol-LDL Rights: 2.84 – 4.13 mmol/l is 1.10 – 1.60 g/l Women: 2.58 – 3.87 mmol/l is 1.00 – 1.50 g/l The normal values of cholesterol-LDL in the blood can also be considered according to the presence or not of cardiovascular risk factors: less than or equal to 1.5 g/l for a person without other cardiovascular risk factor (overweight or obesity, diabetes, physical inactivity, smoking etc. ) and less than or equal to 1.20 g/l for a person presenting a risk factor.
Cholesterol-LDL and coronary risk The report Cholesterol- LDL/ Cholesterol- HDL is connected to a risk factor of coronary heart disease (the risk increases when this report increases).
Overall, this risk is low when LDL -cholesterol / HDL -cholesterol < 3.5 Variations physiological and pathological cholesterol-LDL Globally, the high rates of cholesterol-LDL are regarded as favoring the occurrence of cardiovascular complications. In contrast, the risk decreases when the level of cholesterol-LDL are normal.
The interpretation of the rate must be made in the context of an assessment of cardiovascular risk global which will take into account, among other factors, the total cholesterol, the other fractions of cholesterol, triglycerides, family histories and habits of hygiene of life (physical activity, tobacco, alcohol, food, etc. ).


In principle, a low rate of cholesterol-LDL is good news.


tobacco, alcohol, physical inactivity, power grasse ¦ some medicines (cortisone, contraceptive pills, retinoids, certain antihypertensive agents etc. ).
Abnormally high levels are sometimes observed in cases of hypothyroidism.
Increase in the diseases atherosclerotic plaques and the hyperlipoproteinemies type IIa, IIb and III.
 the cholesterol-LDL "bad cholesterol" cholesterol