Finding out you have a high coronary artery calcium (CAC) score can feel overwhelming. Many people immediately think:
“I have calcified plaque in my arteries. Can I get rid of it? Can I reverse this?”
If you’ve just received a high CAC score, the most important thing to understand is this: The goal is not to erase calcium. The goal is to reduce cardiovascular risk and stabilize plaque.
Why Statins Should Come First
When CAC is elevated, lipid-lowering therapy is the foundation of treatment.
High-intensity statins consistently reduce heart attack risk and can lead to measurable plaque regression in many patients (Dawson et al., 2022). Additional medications such as ezetimibe or PCSK9 inhibitors may further lower LDL cholesterol and ApoB while enhancing plaque stabilization (Dawson et al., 2022).
This matters because LDL and ApoB particles drive plaque formation. Lowering these particles reduces the amount of cholesterol entering the artery wall.
Statins also reduce inflammation within plaque and promote a more stable plaque structure.
Diet alone has not consistently been shown to reverse established calcified plaque in patients with a high CAC burden. However, strong anti-inflammatory diet patterns such as the Mediterranean diet high in unsaturated fats, fruits, vegetables, and whole grains can slow atherosclerosis progression and reduce plaque burden in patients with coronary heart disease (Jimenez-Torres et al., 2021).
The Calcification Paradox: Why CAC Can Increase While Risk Decreases
One of the most confusing things about CAC scores is that they can increase even while treatment is working.
Therapies that stabilize plaque — particularly statins — may increase measured CAC scores. While this sounds alarming, it can actually reflect plaque healing and stabilization.
This happens because plaque calcification occurs in two different forms.
Microcalcification: A Marker of Unstable Plaque
Microcalcification consists of tiny, spotty calcium deposits that develop during active plaque inflammation.
These deposits are associated with unstable plaque and plaque rupture. They form when inflammatory immune cells promote cell death and early bone-like transformation within plaque (Shioi & Ikari, 2018; Jinnouchi et al., 2020).
These small calcium deposits create mechanical stress points that can make plaques more vulnerable to rupture (Shi et al., 2020).
Macrocalcification: A Marker of Plaque Healing
Macrocalcification consists of larger, dense sheets of calcium that develop during plaque healing.
Anti-inflammatory immune signaling promotes a more mature calcification process, creating dense and organized calcium structures (Shioi & Ikari, 2018; Pugliese et al., 2015). This dense calcification can act as a structural barrier that stabilizes plaque.
In simple terms, microcalcification reflects inflammation and instability, while macrocalcification reflects healing and stability.
Why Lowering Inflammation Is the Real Target
This is where statins and diet work together.
Statins reduce LDL and ApoB, lowering lipid accumulation in the artery wall. They also reduce inflammatory signaling within plaque.
As lipid-rich, inflamed plaque shrinks, it may be replaced by more stable calcified tissue (Razavi et al., 2022; Dawson et al., 2022).
Heart-healthy dietary patterns such as Mediterranean-style eating or the Portfolio Diet help reduce systemic inflammation, improve insulin sensitivity, lower triglycerides, and improve endothelial function.
In the CORDIOPREV trial, a Mediterranean diet slowed atherosclerosis progression in patients with coronary heart disease (Jimenez-Torres et al., 2021).
Other imaging studies show that intensive lifestyle interventions can reduce non-calcified plaque volume, even when total plaque burden changes modestly (Dawson et al., 2022).
Again, neither statins nor diet are trying to remove calcium. Instead, the goal is to:
- Reduce inflammation
- Shrink lipid-rich plaque
- Stabilize vulnerable plaque
- Reduce the risk of plaque rupture
If calcium increases because unstable plaque becomes stable and dense, that may represent progress.
This is why clinicians do not chase CAC numbers.
Why CAC Levels Are a Snapshot and Not an End Goal
CAC measures total plaque burden, not plaque vulnerability (Thomas et al., 2017).
Higher CAC scores predict higher cardiovascular risk because they reflect cumulative plaque development over time.
However, CAC scans cannot tell us whether plaque is:
- Inflamed
- Lipid-rich
- Stable
In patients taking statins, rising CAC typically reflects increased calcified plaque volume alone.
In patients not using statins, CAC progression typically reflects growth of both calcified and non-calcified plaque (Razavi et al., 2022).
This is an important distinction. Because CAC cannot differentiate harmful progression from stabilization,repeating CAC scans is not the best way to monitor treatment response.
What We Track Instead of CAC
Instead of focusing on CAC progression, clinicians typically monitor biomarkers that drive cardiovascular risk:
- LDL cholesterol
- ApoB
- Triglycerides
- Blood pressure
- Hemoglobin A1C and insulin resistance
- Inflammatory markers such as hs-CRP
These markers reflect the processes that drive plaque progression.
Lowering ApoB reduces cholesterol particle entry into the artery wall. Improving insulin sensitivity reduces metabolic stress. Lowering inflammation reduces plaque instability.
These processes are what truly move the needle when it comes to reducing cardiovascular events.
What Your Goals Should Be After a High CAC Score
If you’ve learned you have coronary artery calcification, the focus should shift to risk reduction and plaque stabilization.
Your goals should include:
- Aggressively lower LDL and ApoB
- Reduce systemic inflammation
- Improve metabolic health
- Stabilize plaque
- Lower your overall cardiovascular risk
The CAC score itself is not the goal. It is simply a signal that atherosclerosis is present.
The real goal is creating an internal environment where plaque is less inflamed, less lipid-rich, and more stable. Medication and nutrition work together to achieve that..
The Bottom Line
A high CAC score means atherosclerosis is already present. It does not mean your arteries are doomed.
Statins and other lipid-lowering therapies reduce cardiovascular events and often increase calcified plaque as part of the stabilization process.
Anti-inflammatory dietary patterns support the same process by improving metabolic and inflammatory drivers.
This combined strategy is how we reduce heart attack risk, which is ultimately the outcome that matters most.
About the Author
Joseph Lehrberg, MS, RD is a registered dietitian specializing in cardiovascular and metabolic health and founder of CardioFunction Integrative Nutrition Services, a nutrition practice based in Boston. He works with patients with elevated cholesterol, high coronary artery calcium scores, high triglycerides, statin intolerance, and other cardiometabolic risk factors to develop evidence-based nutrition strategies for long-term heart health.
Learn more about working with him here.
References
Shioi A, Ikari Y. Plaque Calcification During Atherosclerosis Progression and Regression. Journal of Atherosclerosis and Thrombosis. 2018.
Jinnouchi H, Sato Y, Sakamoto A, et al. Calcium Deposition Within Coronary Atherosclerotic Lesion: Implications for Plaque Stability. Atherosclerosis. 2020.
Pugliese G, Iacobini C, Blasetti Fantauzzi C, Menini S. The Dark and Bright Side of Atherosclerotic Calcification. Atherosclerosis. 2015.
Shi X, Gao J, Lv Q, et al. Calcification in Atherosclerotic Plaque Vulnerability: Friend or Foe? Frontiers in Physiology. 2020.
Razavi AC, Agatston AS, Shaw LJ, et al. Evolving Role of Calcium Density in Coronary Artery Calcium Scoring and Atherosclerotic Cardiovascular Disease Risk. JACC: Cardiovascular Imaging. 2022.
Dawson LP, Lum M, Nerleker N, Nicholls SJ, Layland J. Coronary Atherosclerotic Plaque Regression: JACC State-of-the-Art Review. Journal of the American College of Cardiology. 2022.
Thomas IC, Forbang NI, Criqui MH. The Evolving View of Coronary Artery Calcium and Cardiovascular Disease Risk. Clinical Cardiology. 2017.
Jimenez-Torres J, Alcalá-Diaz JF, Torres-Peña JD, et al. Mediterranean Diet Reduces Atherosclerosis Progression in Coronary Heart Disease: An Analysis of the CORDIOPREV Randomized Controlled Trial. Stroke. 2021.
