High Cholesterol

 

High Cholesterol: Causes, Risks, Diagnosis, and Treatment

Introduction

High cholesterol is one of the most common health problems worldwide and a major risk factor for cardiovascular diseases. Although cholesterol is essential for many vital body functions, elevated levels in the blood can lead to serious complications if left untreated.

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What Is Cholesterol?

Cholesterol is a type of fat (lipid) found in all body cells. The liver produces most of the cholesterol the body needs, and it plays an important role in:

• Building cell membranes

• Producing hormones

• Synthesizing vitamin D

• Forming bile acids that help digest fats

Cholesterol is also obtained from foods such as:

• Red meat

• Full-fat dairy products

• Fried and processed foods

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Types of Cholesterol

Cholesterol travels through the bloodstream in particles called lipoproteins. The main types include:

1. Low-Density Lipoprotein (LDL) – “Bad Cholesterol”

• High levels lead to fat buildup in artery walls

• Increases the risk of atherosclerosis, heart attacks, and strokes

2. High-Density Lipoprotein (HDL) – “Good Cholesterol”

• Helps remove excess cholesterol from the arteries

• Protects against heart disease

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Who Is at Higher Risk of High Cholesterol?

• Middle-aged adults

• People with a sedentary lifestyle

• Smokers

• Individuals with high blood pressure or diabetes

• Men tend to develop high cholesterol earlier than women

• Postmenopausal women, especially those not receiving hormone replacement therapy

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Symptoms of High Cholesterol

In most cases:

• No noticeable symptoms

In severe cases:

• Yellow fatty deposits on the skin (xanthomas)

• Fatty plaques around the eyelids

• Symptoms related to atherosclerosis, such as chest pain

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Diagnosis

High cholesterol is usually detected through a blood lipid profile, often as part of a routine health check.

Screening Recommendations

• Every 5 years after the age of 21

• More frequently if high cholesterol or risk factors are present

Desirable Cholesterol Levels (mg/dL):

Type	Desirable	Borderline	High
Total Cholesterol	< 200	200–239	≥ 240
LDL Cholesterol	< 130	130–159	≥ 160
HDL Cholesterol	≥ 45	35–44	< 35
Total/HDL Ratio	< 4	—	≥ 5

For patients with coronary artery disease, the target LDL level is below 100 mg/dL.

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Treatment of High Cholesterol

Lifestyle Modifications

• Quit smoking

• Engage in physical activity for at least 30 minutes, 3–5 times per week

• Reduce saturated and trans fats

• Increase intake of fruits, vegetables, and whole grains

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Medications to Lower Cholesterol

Prescribed when lifestyle changes are insufficient or when additional cardiovascular risk factors are present.

1. Statins

• Lower total cholesterol and LDL

• Slightly increase HDL

• Proven to reduce heart attacks and strokes

2. Niacin (Vitamin B3)

• Effectively increases HDL

• Reduces LDL and total cholesterol

3. Bile Acid Sequestrants

• Reduce cholesterol absorption

• Lower LDL and total cholesterol

4. Gemfibrozil

• Effective in improving triglyceride levels

• Moderate effect on LDL and total cholesterol

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Prevention

• Maintain a healthy weight

• Follow a balanced diet

• Monitor cholesterol levels regularly

• Control chronic conditions such as diabetes and hypertension

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Conclusion

High cholesterol is a silent but dangerous condition. Early detection, lifestyle modification, and appropriate medical treatment can significantly reduce the risk of heart disease and stroke.