Causes of High Cholesterol and How to Test for It

High cholesterol is one of the leading risk factors for heart disease and stroke, yet many people do not know they have it because it usually has no obvious symptoms. The only reliable way to know your cholesterol level is through a laboratory blood test.

In this article, you’ll learn what cholesterol is, the common causes of high cholesterol, how it is diagnosed, treatment options, and practical ways to keep your heart healthy.

What Is Cholesterol?

Cholesterol is a waxy, fat-like substance found in every cell of your body. Your body needs cholesterol to produce hormones, vitamin D, and substances that help digest food.

Your liver makes most of the cholesterol your body needs, while the rest comes from foods such as meat, eggs, butter, cheese, and full-fat dairy products.

Problems arise when cholesterol levels become too high, especially Low-Density Lipoprotein (LDL) cholesterol, often called “bad cholesterol.”

Types of Cholesterol

Understanding the different types of cholesterol helps explain your test results.

Low-Density Lipoprotein (LDL)

LDL is known as bad cholesterol because excess LDL can build up inside your arteries, reducing blood flow and increasing the risk of heart attack and stroke.

High-Density Lipoprotein (HDL)

HDL is called good cholesterol because it helps remove excess cholesterol from the bloodstream and carries it back to the liver for disposal.

Triglycerides

Triglycerides are another type of fat found in the blood. High triglyceride levels combined with high LDL or low HDL further increase the risk of cardiovascular disease.

Causes of High Cholesterol

Several factors can contribute to high cholesterol.

1. Unhealthy Diet

Eating foods high in saturated fats and trans fats can raise LDL cholesterol.

Examples include:

• Fried foods.
• Fatty meat.
• Processed meat.
• Butter.
• Full-fat dairy products.
• Cakes and pastries.
• Fast food.

2. Lack of Physical Activity

A sedentary lifestyle can increase LDL cholesterol while reducing HDL cholesterol.

Regular exercise helps improve cholesterol balance and supports overall heart health.

3. Being Overweight or Obese

Excess body weight often increases LDL cholesterol and triglycerides while lowering HDL cholesterol.

Maintaining a healthy weight can improve cholesterol levels.

4. Smoking

Smoking damages blood vessels, lowers HDL cholesterol, and increases the risk of heart disease.

Quitting smoking benefits your heart and overall health.

5. Excessive Alcohol Intake

Drinking too much alcohol can raise triglyceride levels and contribute to obesity and high blood pressure.

6. Diabetes

People with diabetes often have higher triglycerides and lower HDL cholesterol, increasing cardiovascular risk.

Proper diabetes management helps reduce this risk.

7. Family History

Some people inherit genes that cause high cholesterol, a condition known as familial hypercholesterolemia.

These individuals may develop high cholesterol even if they eat a healthy diet.

8. Age

Cholesterol levels tend to rise with age because the body’s ability to remove excess cholesterol gradually decreases.

Risk Factors

Your risk of developing high cholesterol increases if you:

• Eat an unhealthy diet.
• Rarely exercise.
• Smoke.
• Are overweight.
• Have diabetes.
• Have high blood pressure.
• Have a family history of high cholesterol.
• Are over 40 years of age.

Symptoms of High Cholesterol

High cholesterol usually does not cause symptoms.

Many people only discover they have high cholesterol after a routine medical check-up or after developing complications such as heart disease or stroke.

This is why regular screening is important.

How Is High Cholesterol Diagnosed?

The most common test is a Lipid Profile, also called a Lipid Panel.

This blood test measures:

• Total cholesterol.
• LDL (bad cholesterol).
• HDL (good cholesterol).
• Triglycerides.

Some healthcare providers may recommend fasting before the test, while others may use a non-fasting sample depending on the clinical situation. Follow the instructions provided by your healthcare provider or laboratory.

Who Should Have a Cholesterol Test?

You should consider a cholesterol test if you:

• Are 20 years or older and have never been screened.
• Have diabetes.
• Have high blood pressure.
• Are overweight or obese.
• Smoke.
• Have a family history of high cholesterol or heart disease.
• Have previously had abnormal cholesterol results.

Regular screening helps detect problems early, even when you feel healthy.

How Can High Cholesterol Be Treated?

Treatment depends on your cholesterol level and overall risk of heart disease.

Your healthcare provider may recommend:

• A heart-healthy eating plan.
• Regular physical activity.
• Weight management.
• Quitting smoking.
• Limiting alcohol intake.
• Cholesterol-lowering medications when appropriate.

Never start or stop medication without consulting a qualified healthcare professional.

How to Prevent High Cholesterol

Healthy habits can reduce your risk:

• Eat more fruits and vegetables.
• Choose whole grains.
• Limit fried and processed foods.
• Use healthier cooking oils in moderation.
• Exercise for at least 150 minutes each week.
• Maintain a healthy weight.
• Avoid smoking.
• Limit alcohol intake.
• Have regular medical check-ups.

Frequently Asked Questions

Can slim people have high cholesterol?

Yes. Although excess weight increases the risk, genetics, diet, diabetes, and other medical conditions can also cause high cholesterol in people who are not overweight.

Can high cholesterol be cured?

High cholesterol can often be controlled through healthy lifestyle changes and, when necessary, medication. Ongoing monitoring is important.

How often should cholesterol be checked?

The appropriate interval depends on your age, medical history, and risk factors. Your healthcare provider can advise how often you should be tested.

When Should You See a Doctor?

Seek medical advice if you:

• Have diabetes or high blood pressure.
• Have a family history of heart disease.
• Are overweight.
• Have never had your cholesterol checked.
• Have previously been told your cholesterol is high.

Routine screening can identify high cholesterol before it leads to serious health problems.

Conclusion

High cholesterol is a common condition that often develops without symptoms, making regular testing essential. A healthy lifestyle, combined with early detection and appropriate medical care, can significantly reduce the risk of heart disease and stroke.

If you have risk factors for high cholesterol or have never had your cholesterol checked, speak with your healthcare provider about a lipid profile test.

Cholesterol Testing at Omokos Diagnostics

At Omokos Diagnostics, we provide Lipid Profile (Cholesterol Testing) using standard laboratory procedures to help assess your risk of heart disease. We also offer blood sugar testing, kidney function tests, liver function tests, full blood count (FBC), urinalysis, and many other laboratory investigations to support preventive healthcare.

Early testing can help you and your healthcare provider make informed decisions about protecting your heart health.