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

Dr. Warwick Bishop, a practicing cardiologist and author focused on heart health education, discusses findings from the European Atherosclerosis Society conference in Brisbane regarding LDL cholesterol particle size and density. The episode challenges the popular assumption that large fluffy LDL particles are dramatically safer than small dense particles simply based on their size difference.

Key Takeaways:

• Endothelial pores in arteries are approximately 70 microns in diameter, while large fluffy LDL particles are about 50 microns and small dense particles are about 40 microns—a relatively modest difference of only 10 microns.

• The critical distinction between particle types lies in their density, not just diameter, with density differences related to the radius cubed (radius³), which creates a much more significant difference than the small diameter variance.

• The actual size difference between large fluffy and small dense particles (10 microns) may not be the major determining factor in whether particles penetrate artery walls, suggesting the conventional narrative oversimplifies the issue.

• Favoring large fluffy particles remains beneficial because they correlate with a healthier metabolic environment: lower insulin levels, lower triglycerides, and higher HDL cholesterol.

• Maintaining triglyceride levels below 1.1-1.3 millimoles per liter effectively shifts the LDL particle profile from small dense to large fluffy particles.

• Reducing carbohydrate intake is key, as carbohydrates drive insulin production, which directly promotes small dense LDL formation while simultaneously lowering HDL and raising triglycerides.

• While large fluffy particles remain preferable to small dense particles, particle size alone is likely not the primary driver of coronary event risk.