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Elevated cholesterol: When is it a cause for concern?
High Cholesterol: When to Be Concerned
Concerns about high cholesterol are among the common reasons people visit their doctor. Learn everything about cholesterol and how to lower it effectively. 
What is Cholesterol?
Cholesterol is a type of fat essential for building cells, as it is a key component of the cell membrane. It participates in metabolic processes such as the synthesis of sex hormones, adrenal hormones, and vitamin D, and serves as a precursor for bile acids, which are important for fat digestion and absorption.
Because cholesterol is essential for the body, its levels are not determined solely by dietary intake—it is also produced internally. Approximately 20% of cholesterol comes from food (exogenous cholesterol), while about 80% is synthesized in the liver (endogenous cholesterol).
Differences Between LDL and HDL Cholesterol
Cholesterol in the blood binds to proteins, forming particles called lipoproteins. The two most important types are:
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LDL cholesterol (low-density lipoprotein) – carries cholesterol from the liver to cells. Excess LDL can deposit in the walls of arteries, forming atherosclerotic plaques, which can eventually block blood vessels. This is why LDL is called “bad cholesterol.”
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HDL cholesterol (high-density lipoprotein) – collects excess cholesterol from blood and tissues and transports it back to the liver for processing. This reduces the risk of cholesterol buildup in arteries and cardiovascular disease, earning HDL the nickname “good cholesterol.”
Recommended Cholesterol Levels
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Total cholesterol: < 5.0 mmol/L
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LDL cholesterol: < 3.0 mmol/L
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HDL cholesterol: > 1.0 mmol/L for men, > 1.2 mmol/L for women
Negative Effects of High Cholesterol
High total and LDL cholesterol, along with low HDL cholesterol, increase the risk of cardiovascular diseases, especially atherosclerosis. Atherosclerosis is the buildup of plaques in artery walls, narrowing vessels and potentially causing high blood pressure, stroke, or heart attack. Cholesterol deposits in the gallbladder can also lead to gallstones.
Factors That Raise Cholesterol
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Genetic predisposition
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Older age
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Male sex
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Decreased estrogen (postmenopausal women)
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Other health conditions (diabetes, liver, thyroid, kidney disorders)
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Certain medications (oral contraceptives, glucocorticoids)
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Poor diet
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Physical inactivity
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Obesity
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Smoking
When to See a Doctor
The first-line therapy for high cholesterol is lifestyle changes: improved diet, increased physical activity, weight reduction, and quitting smoking. If diet alone does not reduce cholesterol, medication may be prescribed, alongside continued dietary adjustments.
Routine check-ups are especially important for:
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Older adults
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Men and postmenopausal women
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Individuals with chronic conditions such as diabetes, liver, thyroid, or kidney disorders
How to Lower Cholesterol Through Diet
Diet affects cholesterol levels, including synthesis, absorption, and metabolism. Key recommendations:
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Daily cholesterol intake: up to 300 mg for healthy adults; 200 mg if LDL is high
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Total fat: ≤ 30% of total energy intake
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Saturated fat: < 10% of total energy intake
Limit foods high in cholesterol and saturated fats, such as:
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Egg yolks
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Organ meats
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Processed meats
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Red meat
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Fried foods
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Full-fat dairy products (milk, cheese, cream, butter)
Prefer:
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Plant oils (olive, sunflower)
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Cooking methods like boiling and steaming
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High-fiber foods (whole grains, oatmeal, brown rice, barley)
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Five servings of fruits and vegetables daily
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Lean proteins: white poultry meat (without skin), fish, egg whites, legumes, soy, low-fat dairy
Does Physical Activity Help?
Yes. Along with diet, regular aerobic exercise is recommended: walking, running, cycling, swimming—at least 30 minutes daily. Exercise helps regulate body weight and raises HDL (“good”) cholesterol levels.
Medications for High Cholesterol
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Statins: reduce total and LDL cholesterol by helping the liver produce less cholesterol and remove it from blood. Reduce LDL by 30–50%.
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Fibrates: more effective for lowering triglycerides and raising HDL cholesterol; used for mixed dyslipidemia or high triglycerides.
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Resins and ezetimibe: bind bile acids in the intestine, reducing fat absorption and LDL cholesterol.
The choice of medication depends on age, cholesterol levels, and risk factors for heart attack or stroke.
Conclusion
High cholesterol is a major risk factor for cardiovascular disease. First-line therapy is proper diet, physical activity, and lifestyle changes. Medications are prescribed only when lifestyle measures are insufficient or in cases of significantly elevated cholesterol, always in combination with healthy habits.
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