Vitamin K2 and D3 Slow the Coronary Calcium Climb

Key Takeaway

In a double-blind, randomized controlled trial of 400 individuals with advanced coronary artery calcification, a daily combination of vitamin K2 (720 mcg) and vitamin D3 (25 mcg) attenuated calcium accumulation by 52 Agatston units over 24 months compared with placebo. Soft, potentially unstable plaque volume showed no compensatory increase. However, whether this deceleration translates into fewer myocardial infarctions remains unproven.

An Inexorably Rising Number

Picture a 71-year-old retired engineer sitting across from his cardiologist, studying his latest test results. His coronary artery calcium (CAC) score—a computed tomography (CT) quantification of mineral burden within his coronary arterial walls—reads 903. Two years earlier, the number was lower. He takes his statin diligently every evening, walks briskly every morning, and quit smoking decades ago. Looking up, he asks his physician: “What can I do to stop this score from climbing?”

For decades, the only honest clinical response was: nothing directly targets the calcium itself. A CAC score provides a powerful proxy for myocardial infarction risk, and over time, it rises almost without exception. While statins remain the cornerstone of preventive cardiology—lowering LDL cholesterol and substantially reducing cardiovascular events—they actually tend to drive CAC scores upward by calcifying and stabilizing softer lipid plaques. Clinicians have grown accustomed to reassuring patients that a rising calcium score on statin therapy is not necessarily an adverse sign. Yet that…