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High Cholesterol Levels in the Blood

Everything you need to know about high cholesterol levels in the blood, accompanying symptoms, and treatment.


What is Cholesterol?

Cholesterol is a waxy, fat-like substance that the body needs to perform many functions normally. However, high levels of cholesterol in the blood can pose a serious risk to human health.

Cholesterol travels in the blood attached to proteins called lipoproteins, and there are several types. The most important are:

  • Low-Density Lipoprotein (LDL):
    Known as “bad cholesterol,” it carries cholesterol throughout the body and can accumulate on artery walls, causing them to harden and narrow.
  • High-Density Lipoprotein (HDL):
    Known as “good cholesterol,” it transports cholesterol from the cells to the liver where it can be broken down and eliminated.

Functions of Cholesterol

  • Helps build certain hormones and synthesize vitamin D
  • Plays a role in producing bile acids that aid in digestion
  • Contributes to building cell membranes

Normal Cholesterol and Lipoprotein Levels

For Adults:

Type

Optimal Level

Total Cholesterol

< 200 mg/dL

LDL (Low-Density Lipoprotein)

< 100 mg/dL

HDL (High-Density Lipoprotein)

> 60 mg/dL

For Children:

Type

Optimal Level

Total Cholesterol

< 170 mg/dL

LDL (Low-Density Lipoprotein)

< 110 mg/dL

HDL (High-Density Lipoprotein)

> 45 mg/dL


Risk Factors That May Lead to High Cholesterol

  • Being overweight or obese
  • Leading a sedentary lifestyle
  • Smoking
  • Having diabetes
  • Aging
  • Following a diet high in saturated fats
  • Genetic factors and ethnicity

Complications Resulting from High Cholesterol

  • Heart disease, such as:
    • Heart attack
    • Artery blockage
    • Angina (chest pain)
  • Stroke

How to Treat High Cholesterol

In addition to medication, lifestyle changes are essential for effective treatment, including:

  • Following a balanced, healthy diet as a long-term lifestyle, and weight loss if overweight
  • Engaging in a regular exercise routine, such as walking at least 30 minutes daily
  • Quitting smoking
  • Reducing sugar intake

General Tips for a Balanced Diet

  • Eat 4–5 servings of vegetables and 2–3 servings of fruit daily
  • Limit fast food consumption
  • Avoid foods high in saturated fat and hydrogenated oils like fried foods and butter
  • Choose foods rich in unsaturated fats such as vegetable oils and raw nuts
  • Remove chicken skin when cooking
  • Some foods, like garlic, may help lower cholesterol

Recommended and Limited Foods

Food Group

Recommended Foods

Foods to Limit or Avoid

Carbohydrates

Bran bread, oats

Sugar-added sweets like frosted cake

Dairy

Skimmed milk

Full-fat milk

Fruits

Apples, bananas, peaches, plums, fresh fruit

Fruits cooked with fat, like fried bananas

Vegetables

Fresh, boiled, or grilled vegetables (e.g., carrots, zucchini)

Fried vegetables like cauliflower, zucchini, French fries

Fats

Olive oil, raw nuts

Butter, roasted nuts

Proteins

Skinless chicken, grilled fish, veal, legumes (e.g., lentils, chickpeas)

Fried meats, fish, chicken; high-fat meats; processed meats like sausages



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