High Cholesterol

High cholesterol is a buildup of harmful lipids in the blood, increasing the risk of heart attack, stroke, and vascular disease. Often silent without screening.

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By Kaveh Samani, MD · Internal Medicine PhysicianReviewed May 9, 20262 min read

Key takeaways

High cholesterol is a buildup of harmful lipids in the blood that raises the risk of heart attack, stroke, and vascular disease — and it's usually silent, detectable only through a lipid panel blood test.
LDL ('bad') cholesterol drives arterial plaque; HDL ('good') cholesterol helps clear it. Treatment focuses on lowering LDL, with the target matched to your overall cardiovascular risk rather than one universal number.
A heart-healthy lifestyle — diet, activity, weight management, and not smoking — is the foundation of treatment and lowers risk at every age.
Statins are first-line drug therapy, recommended for LDL of 190 mg/dL or higher, for most adults 40–75 with diabetes, and for others based on estimated 10-year cardiovascular risk. Ezetimibe and PCSK9 inhibitors are added when statins aren't enough.
Because damage accumulates silently for years, regular screening — especially with a family history of heart disease — is one of the most effective ways to protect long-term heart health.

Understanding High Cholesterol

Cholesterol is a fatty substance found in your blood. Your body needs it to build healthy cells, but too much of it can lead to serious health problems, including heart disease and stroke. High cholesterol doesn't usually cause symptoms, so many people don't realize they have it until it leads to complications.

There are two main types of cholesterol:

LDL (Low-Density Lipoprotein): Often called "bad" cholesterol because it can build up in the arteries and lead to blockages.
HDL (High-Density Lipoprotein): Known as "good" cholesterol because it helps remove excess cholesterol from the bloodstream.

What Causes High Cholesterol?

Unhealthy Diet: Eating too many saturated fats, trans fats, and processed foods can raise cholesterol levels.
Lack of Exercise: Physical inactivity can lower good cholesterol (HDL) and raise bad cholesterol (LDL).
Obesity: Excess weight is linked to higher levels of LDL and lower levels of HDL.
Smoking: Damages blood vessels, making it easier for cholesterol to build up in the arteries.
Genetics: If high cholesterol runs in your family, you may be more likely to develop it.
Certain Medical Conditions: Diabetes, thyroid disorders, and liver disease can contribute to high cholesterol.

Signs and Symptoms

High cholesterol itself doesn't cause symptoms, but it can lead to serious conditions over time, such as:

Chest pain (angina) due to reduced blood flow to the heart
Heart attack caused by a blocked artery
Stroke if cholesterol buildup blocks blood flow to the brain
Peripheral artery disease (PAD) — reduced blood flow to the legs, leading to pain and mobility issues

How is High Cholesterol Diagnosed?

The only way to know if you have high cholesterol is through a blood test called a lipid panel, which measures total cholesterol, LDL cholesterol, HDL cholesterol, and triglycerides.

Managing and Treating High Cholesterol

Lifestyle Changes

Eat heart-healthy foods — focus on fruits, vegetables, whole grains, lean proteins, and healthy fats like olive oil and avocados.
Exercise regularly — aim for at least 30 minutes of physical activity most days of the week.
Maintain a healthy weight — losing even a small amount of weight can help lower cholesterol.
Quit smoking — improves HDL levels and benefits overall heart health.
Limit alcohol intake — drinking in moderation helps maintain healthy cholesterol levels.

Medications

If lifestyle changes aren't enough, doctors may prescribe:

Statins: The most common drugs used to lower LDL cholesterol.
Ezetimibe: Helps reduce cholesterol absorption from food.
PCSK9 Inhibitors: Lower cholesterol in people with genetic conditions or high risk of heart disease.

Measure	Optimal level
LDL ("bad") cholesterol	Under 100 mg/dL — lower if you're high-risk
HDL ("good") cholesterol	40+ (men), 50+ (women)
Triglycerides	Under 150 mg/dL
Total cholesterol	Under 200 mg/dL

When to See a Doctor

Regular cholesterol screenings are important, especially if you have a family history of heart disease or other risk factors. Keeping your cholesterol levels in check is one of the best ways to protect your heart health for years to come.

Signs & symptoms

Signs and symptoms to watch for

Usually no symptoms — detected on a blood test (lipid panel)
Chest pain or pressure with exertion (angina) if arteries are affected
Fatty deposits around the eyelids (xanthelasma)
Fatty deposits on tendons or skin (xanthomas)
Symptoms of complications, such as heart attack or stroke, in advanced disease

When to see a specialist

Should you see a specialist?

Frequently asked

High Cholesterol questions, answered

Does high cholesterol have symptoms?

No, it causes no symptoms, which is what makes it dangerous. The only way to know is a blood test, and by the time it causes a heart attack or stroke, damage is already done.

How can I lower my cholesterol?

A diet lower in saturated fat, regular exercise, weight loss, and not smoking all help. When lifestyle isn't enough, medications like statins are very effective and safe for most people.

Is high cholesterol hereditary?

It can be. Some people inherit a tendency to very high cholesterol that needs treatment regardless of lifestyle, and a family history of early heart disease is a clue.

Do I really need a statin?

It depends on your cholesterol level and your overall cardiovascular risk, not the number alone. For higher-risk patients, statins meaningfully cut the chance of heart attack and stroke.

What is a healthy cholesterol level?

In general, an LDL ("bad") cholesterol under 100 mg/dL and a total cholesterol under 200 mg/dL are goals for many adults, though your target depends on your overall risk. Your doctor sets it based on your history.

Sources

References

Grundy SM, Stone NJ, Bailey AL, et al. 2018 AHA/ACC/Multisociety Guideline on the Management of Blood Cholesterol. Circulation 2019;139(25):e1082–e1143 — https://www.ahajournals.org/doi/10.1161/CIR.0000000000000625
Writing Committee. 2022 ACC Expert Consensus Decision Pathway on the Role of Nonstatin Therapies for LDL-Cholesterol Lowering. J Am Coll Cardiol 2022;80(14):1366–1418 — https://www.jacc.org/doi/10.1016/j.jacc.2022.07.006
US Preventive Services Task Force. Statin Use for the Primary Prevention of Cardiovascular Disease in Adults: Preventive Medication. JAMA 2022;328(8):746–753 — https://www.uspreventiveservicestaskforce.org/uspstf/recommendation/statin-use-in-adults-preventive-medication
Centers for Disease Control and Prevention: About Cholesterol — https://www.cdc.gov/cholesterol/about/index.html
National Heart, Lung, and Blood Institute: Blood Cholesterol — https://www.nhlbi.nih.gov/health/blood-cholesterol
MedlinePlus: Cholesterol — https://medlineplus.gov/cholesterol.html

SpecialtyInternal MedicineICD-10 codeE78.00Associated anatomyBlood vessels, liver, arteries

Also called Hypercholesterolemia, Hyperlipidemia, Dyslipidemia, Elevated Cholesterol, High LDL

This page is for general education and is not a substitute for medical advice from your physician. Contact a Remix Medical clinician about your specific situation.

Updated May 9, 2026. Medically reviewed by Kaveh Samani, MD.