EP53: What Is Cholesterol?

Welcome to my podcast. I am Doctor Warrick Bishop, and I want to help you to live as well as possible for as long as possible. I’m a practising cardiologist, best-selling author, keynote speaker, and the creator of The Healthy Heart Network. I have over 20 years as a specialist cardiologist and a private practice of over 10,000 patients. Episode Summary Introduction Dr. Warwick Bishop is a practicing cardiologist and author dedicated to educating patients about heart health, believing that informed patients receive better care. In this episode, he provides a foundational explanation of cholesterol—its chemical nature, biological functions, and how the body transports and manages it. Key Takeaways: Cholesterol is a steroid alcohol, a fatty compound that serves as an essential building block for cell membranes throughout the body. The body uses cholesterol to produce bile acids in the liver, which help break down and transport fats through the digestive system for removal. Cholesterol is a precursor for steroid hormones, including sex hormones like estrogen and testosterone. Because cholesterol is water-insoluble, the body requires special transport molecules called lipoproteins to move it through the bloodstream. The body produces the vast majority of its cholesterol internally through metabolic processes in the liver, with genetics playing a major role in determining production levels. Low-density lipoprotein (LDL) is the primary carrier that transports cholesterol from the liver to body tissues and is the type associated with coronary artery disease risk. High-density lipoprotein (HDL) performs reverse cholesterol transport, picking up excess cholesterol from tissues and returning it to the liver for disposal. Cholesterol metabolism involves three interconnected processes: endogenous production in the liver, exogenous consumption from diet, and reverse cholesterol transport back to the liver. Statin medications work by blocking the HMG-CoA enzyme, which reduces the body's internal cholesterol production.