High Cholesterol: What It Is and What to Do About It

High cholesterol is one of those conditions that gives no warning. Most people feel completely well while it slowly damages their blood vessels. By the time problems appear, often as chest pain, a heart attack, or a stroke, the underlying cholesterol issue has been there for years.

In India, high cholesterol affects roughly 25 to 30% of urban adults. Many do not know they have it because it produces no symptoms. The good news is that cholesterol is easy to measure with a simple blood test, and the treatments are well-established.

This is a practical guide to what cholesterol actually is, why high levels matter, and how to bring them under control.

What cholesterol is

Cholesterol is a waxy substance the body makes in the liver and absorbs from food. It is not all bad. The body uses it to make cell membranes, hormones (including estrogen and testosterone), vitamin D, and bile acids for digesting fat.

The problem starts when there is too much of certain types in the blood. Cholesterol travels in particles called lipoproteins. The two main types you will hear about:

1. LDL (low-density lipoprotein): often called "bad" cholesterol. Carries cholesterol from the liver to the rest of the body. High levels lead to cholesterol deposits in artery walls.

2. HDL (high-density lipoprotein): often called "good" cholesterol. Carries cholesterol from tissues back to the liver for removal. Higher levels protect against heart disease.

Two other measurements matter:

3. Total cholesterol: a sum of all cholesterol types.

4. Triglycerides: a different type of fat in the blood, with its own significance (covered in a separate blog).

Why high cholesterol is dangerous

When LDL levels are high for years, cholesterol deposits build up inside artery walls. This is called atherosclerosis. The arteries become narrower and stiffer. Blood flow reduces.

This affects several organs:

• Heart arteries: can cause angina (chest pain), heart attack
• Brain arteries: can cause stroke
• Leg arteries: peripheral arterial disease, pain on walking
• Kidney arteries: kidney problems
• Other arteries: various effects

A cholesterol-related plaque can also rupture suddenly, causing a clot that blocks the artery completely. This is what causes most heart attacks and many strokes.

Risk factors for high cholesterol

Some factors you cannot change:

• Age (cholesterol tends to rise with age)
• Family history (familial hypercholesterolemia is a genetic condition causing very high cholesterol from young age)
• Gender (men generally have higher cholesterol earlier; women's risk rises after menopause)
• Ethnic background (Indians are at higher risk)

Factors you can change:

• Diet high in saturated and trans fats
• Limited physical activity
• Overweight, especially abdominal weight
• Smoking
• Excess alcohol
• Diabetes and prediabetes
• Thyroid disorders
• Stress

Cholesterol numbers to know

A standard lipid profile measures total cholesterol, LDL, HDL, and triglycerides. Done after 9 to 12 hours of fasting (though some labs now do non-fasting tests).

Total cholesterol:

• Desirable: less than 200 mg/dL
• Borderline high: 200 to 239 mg/dL
• High: 240 mg/dL or above

LDL cholesterol:

• Optimal: less than 100 mg/dL
• Near optimal: 100 to 129 mg/dL
• Borderline high: 130 to 159 mg/dL
• High: 160 to 189 mg/dL
• Very high: 190 mg/dL or above

For people with diabetes, heart disease, or other high-risk conditions, the LDL target is much lower (often below 70 mg/dL, sometimes below 55 mg/dL).

HDL cholesterol:

• Low (risk factor): below 40 mg/dL in men, below 50 mg/dL in women
• Desirable: 40 to 60 mg/dL
• High (protective): 60 mg/dL or above

Triglycerides:

• Normal: less than 150 mg/dL
• Borderline high: 150 to 199 mg/dL
• High: 200 to 499 mg/dL
• Very high: 500 mg/dL or above

Another useful calculation:

Non-HDL cholesterol (total cholesterol minus HDL): captures all the "bad" cholesterol types. Target generally 30 mg/dL above the LDL target.

Symptoms (almost always none)

High cholesterol typically produces no symptoms. This is why so many cases go undetected for years.

In severe cases (especially familial hypercholesterolemia), some signs may appear:

• Yellowish deposits on skin (xanthomas), especially around eyes, elbows, knees, tendons
• Yellow-grey ring around the cornea (corneal arcus), especially if seen in younger people
• Tendon thickening

When symptoms of complications occur, the disease is already advanced:

• Chest pain on exertion (angina)
• Pain in calves when walking (claudication)
• Stroke symptoms
• Heart attack symptoms

When to get tested

Standard recommendation:

• Adults from age 20, every 5 years
• More often if you have risk factors
• Annually for people with diabetes, hypertension, heart disease, or known high cholesterol
• Children with family history of very early heart disease
• Earlier and more often if you have a family history of high cholesterol

In India, given the high prevalence and earlier onset of heart disease in Indians, many doctors recommend annual lipid screening from age 30 onwards.

How high cholesterol is treated

Treatment depends on your overall cardiovascular risk, not just the cholesterol numbers. A doctor calculates this from several factors: age, gender, blood pressure, smoking status, diabetes, family history, and existing heart disease.

1. Lifestyle changes (always the foundation)

These work for almost everyone and reduce LDL by 10 to 25% in many cases.

Diet:

• Less saturated fat (limit red meat, butter, ghee, full-fat dairy, fried foods)
• Avoid trans fats (vanaspati, bakery items, packaged snacks)
• More fibre, especially soluble fibre (oats, dals, beans, fruits, vegetables)
• More whole grains
• More fish (especially fatty fish)
• More nuts
• Plant sterols (in fortified products)
• Use mustard, olive, or rice bran oil over palm or coconut oil for everyday cooking

A separate blog in this series covers foods to lower cholesterol in detail.

Exercise:

• 150 minutes of moderate exercise per week
• Mix of cardio and strength training
• Raises HDL, lowers LDL and triglycerides

Weight management:

• Even 5 to 10% weight loss significantly improves cholesterol
• Belly fat reduction is particularly helpful

Stop smoking: smoking lowers HDL and increases overall cardiovascular risk dramatically.

Limit alcohol: moderate amounts may raise HDL slightly but excessive amounts raise triglycerides and other problems.

Manage diabetes if present.

Manage stress and sleep: both affect cholesterol and overall heart risk.

2. Medications

When lifestyle changes are not enough, or when cardiovascular risk is high, medications are used.

Statins: the most commonly prescribed cholesterol medications. Reduce LDL by 30 to 60%. Atorvastatin, rosuvastatin, simvastatin are commonly used.

Statins:

• Are extremely effective
• Reduce heart attack and stroke risk significantly
• Are generally safe long-term
• Common concerns include muscle aches (most are not severe), small risk of liver function changes (monitored with blood tests), small risk of diabetes (usually outweighed by cardiovascular benefits)
• Pregnancy and breastfeeding require alternative approaches

Statins are particularly important for:

• People with existing heart disease
• People with diabetes
• People with very high LDL
• Anyone with high overall cardiovascular risk

Ezetimibe: reduces cholesterol absorption from the gut. Often combined with statin for additional effect.

PCSK9 inhibitors: injectable medications that dramatically lower LDL. Used in severe cases or when other treatments are not enough.

Fibrates: mainly for high triglycerides; some effect on LDL.

Bile acid sequestrants: less commonly used now.

Niacin (vitamin B3): lowers LDL and triglycerides, raises HDL; less used now due to side effects.

The medication choice depends on which cholesterol problem dominates, other health conditions, drug interactions, and individual factors.

Common myths

"I feel fine, so my cholesterol must be normal." High cholesterol has no symptoms until complications develop.

"Eggs cause high cholesterol." Dietary cholesterol from eggs has less impact on blood cholesterol than was once thought. Most healthy people can have eggs in moderation.

"Statins are dangerous and damage the liver." Significant liver damage from statins is rare. Routine monitoring catches issues. The benefits in reducing heart attacks vastly outweigh the small risks.

"Statins cause memory loss." Studies do not support a meaningful link. The benefits of preventing strokes likely outweigh any small theoretical risk.

"Natural remedies are better than medications." Some natural approaches help mildly. Severe high cholesterol or high cardiovascular risk needs medication for adequate protection.

"Once cholesterol is normal, I can stop statins." Stopping statins usually returns cholesterol to previous levels and the cardiovascular protection ends. Most people need lifelong treatment.

"Thin people do not get high cholesterol." Cholesterol is significantly genetic. Thin people can have high cholesterol.

"Coconut oil is healthy." Coconut oil is high in saturated fat and raises LDL cholesterol. Not the best choice for everyday cooking in people with cholesterol concerns.

"I take medications, so I do not need to watch my diet." Diet still matters. Combining lifestyle and medication gives the best results.

"My HDL is high, so my LDL does not matter." LDL still matters. High HDL is helpful but does not cancel high LDL.

Special situations

1. High cholesterol in young adults

Family history matters greatly. If parents or siblings had early heart disease (men before 55, women before 65), screening should start earlier.

Familial hypercholesterolemia is a genetic condition where LDL is very high from young age. About 1 in 250 people. Often missed. Causes early heart disease. Treatment is essential and lifelong.

2. Cholesterol in women

Women generally have higher HDL and lower LDL than men until menopause. After menopause, the difference narrows and cardiovascular risk rises. Women often have atypical heart disease symptoms, leading to delayed diagnosis.

Hormone replacement therapy has complex effects on cholesterol and is not used solely for cholesterol management.

3. Cholesterol with diabetes

People with diabetes need lower LDL targets (usually below 70 mg/dL). Statins are often prescribed regardless of LDL level. Triglycerides tend to be high; specific treatment may be needed.

4. Cholesterol with thyroid disease

Hypothyroidism raises cholesterol. Treating the thyroid often normalises cholesterol without other treatment.

5. High cholesterol in pregnancy

Cholesterol normally rises in pregnancy. Treatment with statins is contraindicated. Diet and lifestyle measures are used; medications are restarted after delivery if needed.

Monitoring

For someone on cholesterol treatment:

• Lipid profile 4 to 12 weeks after starting or changing medication
• Then every 6 to 12 months once stable
• Liver function tests as recommended (less frequent than was once thought necessary)
• Discussion of any side effects
• Address related risk factors (blood pressure, diabetes, weight)

Care at Prakash Hospital Noida

At Prakash Hospital Noida, our cardiologists and physicians evaluate cardiovascular risk comprehensively, manage high cholesterol with personalised treatment plans combining lifestyle counselling and medications, and provide screening for related conditions (diabetes, hypertension, kidney disease). Cardiac evaluation including ECG, echocardiogram, and stress tests is available.

Whether you live in Sector 18, Sector 62, Greater Noida West, or anywhere nearby, Prakash Hospital Noida is a trusted name for cardiology and cholesterol management in Noida.

To book a consultation, call the number.

A practical takeaway

High cholesterol is common, silent, and significantly raises risk of heart attacks and strokes. A simple blood test detects it. Treatment is well-established and effective.

For most people, lifestyle changes (better diet, regular exercise, weight management, no smoking) form the foundation. Statins are added when risk is high or lifestyle changes are not enough. The combination prevents most cholesterol-related heart disease.

Get tested if you have not been. Know your numbers. Take action. The work you put in now prevents the dramatic problems that show up suddenly decades later.