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How Cholesterol Affects Heart Health
Cholesterol is a fatty, waxy substance found in every cell of the body — essential for building cell membranes, producing hormones, synthesizing vitamin D, and manufacturing bile acids for digestion....
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Dr. Michael Thompson
General Practitioner
8 min read
|May 2, 2026Medically reviewed by Dr. Michael Thompson · Editorial Policy
Cholesterol is a fatty, waxy substance found in every cell of the body — essential for building cell membranes, producing hormones, synthesizing vitamin D, and manufacturing bile acids for digestion. Despite its vital biological roles, high blood cholesterol — specifically elevated LDL cholesterol — is one of the most important modifiable risk factors for coronary artery disease, heart attack, and stroke. Understanding how cholesterol affects the heart, which fractions matter most, and how to manage cholesterol effectively is fundamental to cardiovascular health.
WHAT IS CHOLESTEROL?
Cholesterol is a lipid (fat-like molecule) that cannot dissolve in blood. To be transported through the bloodstream, cholesterol is packaged into lipoproteins — complex particles consisting of cholesterol, other lipids (triglycerides, phospholipids), and proteins (apolipoproteins) that serve as a water-soluble shell around the lipid core.
Different lipoproteins have different compositions, sizes, and functions — and different implications for cardiovascular risk:
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Primary Source
American Heart Association: CholesterolMedical Disclaimer: This article is for educational and informational purposes only. It is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of your physician or other qualified health provider with any questions you may have regarding a medical condition.
Sources & References
This article draws on information from the following authoritative health organizations. Always consult a qualified healthcare professional for personal medical advice.