Inferring Particle Size from ApoB and LDL-C

High cholesterol is one of the most widely discussed—and established—risk factors in medicine. But reams of research now show that while it is key to cardiovascular risk, it is not the whole story.

In this episode of A Whole New Level, editorial director Mike Haney sits down with Dr. Ronald Krauss, one of the world’s leading lipid researchers and a pioneer in understanding how different forms of LDL—and the physiological factors around them—affect cardiovascular risk.

Dr. Krauss explains why the basic link between cholesterol and heart disease is well established among experts—but also why the standard cholesterol panel often misses the deeper metabolic story. Drawing on decades of research, he walks through how lipoproteins, particle size, triglycerides, and metabolic health interact to determine whether cholesterol actually becomes dangerous.

Along the way, the conversation explores why cardiovascular disease remains the leading killer despite statins and decades of research—and how factors like obesity, insulin resistance, and inflammation reshape the lipid landscape in ways that traditional tests may not capture.

The result is a clearer framework for understanding cardiovascular risk: not just how much cholesterol is in the blood, but how it’s being transported, how long those particles circulate, and what metabolic conditions are driving them.

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In this episode, we cover

• Why the cholesterol–heart disease link isn’t actually controversial among researchers
• Cholesterol vs. lipoproteins: why the particles carrying cholesterol matter more than the number itself
• Small dense LDL: how triglyceride metabolism produces the most harmful particles
• ApoB and particle counts: why many researchers prefer measuring particles instead of cholesterol mass
• Lipoprotein(a): the genetically driven risk factor affecting up to a third of the population
• Metabolic syndrome: the cluster of conditions that amplifies cardiovascular risk
• Why carbohydrates and metabolic dysfunction can drive harmful lipid patterns
• The saturated fat debate: why food context and metabolic health matter more than simple fat categories

🎙 What Dr. Ronald Krauss & Mike Haney discuss:

[01:09] — Why the cholesterol–heart disease link is largely settled science

[02:27] — Why cardiovascular disease remains the world’s leading killer

[04:42] — Inflammation and metabolic dysfunction in vascular disease

[06:12] — The discovery of small dense LDL and why particle size matters

[07:14] — Lipoprotein(a) as a major inherited cardiovascular risk factor

[09:18] — “Residence time”: why particles that circulate longer cause more damage

[11:24] — ApoB vs LDL-C: measuring particles instead of cholesterol mass

[13:31] — The HDL paradox: why raising HDL hasn’t improved outcomes

[15:28] — Metabolic syndrome and the five markers that amplify risk

[17:16] — Why the saturated fat debate misses the bigger metabolic picture

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Look for new shows every month on A Whole New Level, where we have in-depth conversations with thought leaders about metabolic health.

🔗 Helpful links

Watch the conversation: ⁠https://youtu.be/sS0orvd2TFs

Find us on YouTube: ⁠⁠⁠https://youtube.com/levelshealth?sub_confirmation=1⁠⁠⁠

📲 Connect

Connect with Dr. Ronald Krauss on LinkedIn: ⁠https://www.linkedin.com/in/ronald-krauss-81a38021/