What is the normal cholesterol level?

What Do Cholesterol Levels In The Blood Mean?

The total level of cholesterol in the blood is calculated by measuring the proportions of all cholesterol components in an individual’s blood, which include bad cholesterol, or the so-called low-density lipoprotein, good cholesterol, or so-called high-density lipoprotein, and triglycerides, or so-called very-low-density lipoprotein. . It should be noted that the total values ​​of blood cholesterol cannot be explained in the absence of any of the cholesterol components listed below.

What is the normal cholesterol level?

Types of blood cholesterol

Bad cholesterol

This type of cholesterol accumulates on the surface of the inner walls of an individual’s arteries, increasing the risk of heart disease. For the purpose of verifying  whether the individual does not have any the cardiovascular diseases, or if he is not at risk of developing heart diseases, he should review the following general indicators, where the numbers refer to the percentage of bad cholesterol in the blood, which determines the individual’s health status according to the following:

  • An ideal level if the level of bad cholesterol is 2.6 mmol/L (100 mg/dL).
  • A near-ideal level or slightly higher if the ratio is between 2.6-3.3 mmol/L (100-129 mg/dL).​
  • The ratio is at the upper end of the normal level if it ranges between 3.4-4.1  mmol/L (130-159mg/dL).
  • A case of a high level of bad cholesterol if the ratio ranges between 4.14-4.9 mmol/L (160-189 mg/dL).​
  • A case of a significant increase in cholesterol level if the ratio is 4.92 mmol/L (190 mg/dL) or higher.​

Thus, the therapeutic goal for individuals with cardiovascular disease should be an LDL cholesterol level of less than 1.8 mmol/L (70 mg/dL). The therapeutic goal for individuals who live with a high degree of risk of developing these diseases, that is, individuals with diabetes or who have been diagnosed with several factors that make them susceptible to heart disease, is that the level of bad blood cholesterol is less than 2.6 mmol/L (100 mg/dL).

Good cholesterol

This type of cholesterol protects the individual from heart disease, as it expels bad cholesterol from the blood and prevents it from accumulating in the arteries. And the numbers that indicate the level of healthy cholesterol in the blood of an individual reflect his health condition according to the following:​

  • The ratio is considered low and becomes a risk factor if it is less than 1 mmol/L (40 mg/dL).​
  • The ratio is considered good and helps reduce the risk of heart disease if it is 1.6 mmol/L (60 mg/dL) or higher.​

Triglyceride

It is the chemical form in which most types of fat appear, whether in food or in the human body. Triglycerides are normally carried by very-low-density lipoprotein and also by chylomicrons, the microscopic fatty particles found in the digestive system. It should be noted that very-low-density lipoprotein is produced by the liver and contains cholesterol as well. As for the chylomicrons, they come from dietary fats.

Cholesterol and triglycerides are involved in the formation of fats in the blood plasma. It is known that an increase in the levels of triglycerides in the plasma is related to the incidence of some individuals with coronary artery disease. It is possible to notice and diagnose high levels of cholesterol and triglycerides in the plasma by examining plasma samples. It is necessary that these samples be taken from the patient after abstaining from food and alcoholic beverages throughout the night until the time of blood sampling. And the numbers that refer to the level of triglycerides in the blood of an individual reflect his health condition according to the following:​

  • Normal if it is less than 1.7 mmol/L (150 mg/dL).
  • The ratio is at the upper end of the ideal level if it ranges between 1.7 – 2.25 mmol/L (150 – 199 mg/dL).​
  • The ratio is considered high if it ranges between 2.26 – 5.64 mmol/L (200 – 499 mg/dL).​
  • The ratio is considered too high if it reaches 5.65 mmol/L (500 mg/dL) or higher.

What is the normal cholesterol level?

Who are the people who should have a blood cholesterol test?

All people over the age of 20 should have their blood cholesterol tested at least once every five years. This test is called a person’s data on levels of lipoproteins, which includes:

  • Total cholesterol level.
  • Good cholesterol level.
  • Triglyceride level.

As for the level of bad cholesterol, it is calculated based on the three values ​​mentioned above

What affects the determination of blood cholesterol levels?

There are various factors that can affect the determination of blood cholesterol levels, which are:

  • The nature of food: saturated and unsaturated fats and cholesterol in the food that an individual eats contribute to an increase in cholesterol levels in the blood. Therefore, the individual is advised to reduce the amount of saturated and unsaturated fats and cholesterol and to take this aspect into account when choosing the type of foods he eats, as this approach helps the individual reduce blood cholesterol levels. It is worth noting that eating saturated and unsaturated fats has the greatest effect on raising cholesterol levels.
  • Body weight: Obesity leads to an increase in triglycerides, and being overweight is a risk factor for heart disease. Therefore, losing weight, thus helps reduce triglyceride levels and also raises the level of good cholesterol
  • Exercising: Exercising in physical activities helps lower the level of bad cholesterol and raises the level of good cholesterol. Therefore, the patient is advised to try to do physical activities for 30 minutes a day on most days of the week.
  • Age and gender of the individual: The older the individual, the higher the levels of cholesterol in his blood. It is also known that the total levels of blood cholesterol in premenopausal women are lower than in men of the same age, but it has been noted that the levels of bad cholesterol in women tend to rise after menopause.​
  • Genetic factor: An individual’s genetic genes can determine the levels of cholesterol contained in his body. It has been found that high blood cholesterol can be inherited by members of the same family.

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